atsg honda baxa maxa m6ha
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INDEX
Copyright © ATSG 1999
HOND A ACCO RD BAXA/MAX AHOND A PREL UDE M6HA
OVERVIEW .............. ............... ............... ............... ............ ............... ............... ............... ............... ............... ........ 3CLUTCH APPLICATION CHART............. ............... ............... ............... ............... ............... ............... ............... 4COMPONENT LOCATOR......................... ............... ............... ............... ............... ............... ............... ............... ... 5SOLENOID FUNCTION CHART ............... ............... ............... ............... ............... ............... ............... ............... . 7LOCKUP OPERATION.................. ............... ............... ............... ............... ............... ............... ............... ............... 13
SOLENOID OPERATION................... ............... ............... ............... ............... ............... ............... ............... .......... 14PRESSURE SWITCH DIAGNOSIS ............... ............... ............... .............. ............... ............... ............... ............. 18SPORT SHIFT MODE (PRELUDE ONLY) .............. ............... ............... ............... ............... ............... ............... .. 19GRADE LOGIC CONTROL SYSTEM.......... ............... ............... ............... ............... ............... ............... ............. 20CODE RETRIEVAL PROCEDURE (ACCORD)..... ............... ............... ............... ............... ............... ............... .. 22CODE CLEARING PROCEDURE (ACCORD) ............. ............... ............... ............... ............... ............... ........... 23CODE RETRIEVAL PROCEDURE (PRELUDE)................. ............... ............... ............... ............... ............... ..... 24CODE CLEARING PROCEDURE (PRELUDE)................ ............... ............... ............... ................ ............... ....... 25DIAGNOSTIC TROUBLE CODE DEFINITIONS ............. ............... ............... ............... ............... ............... ..... 26TCM WIRING DIAGRAM AND TERMINAL LOCATIONS (ACCORD)................... ............... ............... ......... 29TCM WIRING DIAGRAM AND TERMINAL LOCATIONS (PRELUDE)................ ............... ............... ........... 30TROUBLE SHOOTING GUIDES ............. ............... ............... ............... ............... ............... ............... ............... .... 31A/T GEAR POSITION SWITCH CONTINUITY CHART.............. ............... ............... ............... ............... ......... 35OIL PRESSURE CHART............... ............... ............... ............... ............... ............... ............... ............... ............... .. 36AUTOMATIC TRANSMISSION FLUID REQUIREMENTS..... ............... ............... ............... ............... ............ 37
TRANSMISSION REMOVAL............. .............. ............... ............... ............... ............... ............... ............... ........... 38DIS-ASSEMBLY END COVER AND IDLER GEARS (BAXA)..... ............... ............... ............... ............... ........... 43DIS-ASSEMBLY END COVER AND IDLER GEARS (M6HA)...... ............... ............... ............... ............... .......... 44GENERAL DIS-ASSEMBLY.............. ............... ............... ............... ................ ............... ............... ............... ............ 46VALVE BODY DIS-ASSEMBLY............... ............... ............... ............... ............... ............... ............... ............... ..... 50INSPECTION AND RE-ASSEMBLY............... ............... ............... ............... ............... ............... ............... ............ 61GENERAL RE-ASSEMBLY............... ............... ............... ................ ............... ............... ............... ............... ........... 85TORQUE CONVERTER AND DRIVE PLATE....................... ............... ............... ............... ............... ............... ... 94TRANSMISSION INSTALLATION......... ............... ............... ............... ............... ............... ............... ............... ..... 95SPECIFICATIONS (BAXA)...... ............... ............... ............... ............... ............... ............... ............... ............... .... 101SPECIFICATIONS (M6HA)....... ............... ............... ............... ............... ............... ............... ............... ............... ... 106SPECIAL TOOLS............. ............... ............... ............... ......... ............... ............... ............... ............... ............... .... 109BULLETINS................... ............... ............... ............. ............. ............... ............... ............... ............... ............... ..... 110
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INTRODUCTIONHONDA ACCORD BAXA/MAXA
HONDA PRELUDE M6HA
DALE ENGLANDFIELD SERVICE CONSULTANT
ED KRUSETECHNICAL CONSULTANT
WAYNE COLONNATECHNICAL SUPERVISOR
PETER LUBANTECHNICAL CONSULTANT
JIM DIALTECHNICAL CONSULTANT
GREGORY LIPNICK TECHNICAL CONSULTANT
JERRY GOTTTECHNICAL CONSULTANT
JON GLATSTEINTECHNICAL CONSULTANT
DAVID CHALKER TECHNICAL CONSULTANT
ROLAND ALVAREZTECHNICAL CONSULTANT
GERALD CAMPBELLTECHNICAL CONSULTANT
1
No part of any ATSG publication may be reproduced, stored in any retrieval system or transmitted in any form or by any means, including but not limited to electronic, mechanical, photocopying, recording or otherwise,without written permission of Automatic Transmission Service Group. This includes all text illustrations,tables and charts.
"ATSG would like to thank Honda Motor Co. for the illustrationsand information contained in this manual."
The information and part numbers contained in this booklet havebeen carefully compiled from industry sources known for their
reliability, but ATSG does not guarantee its accuracy.
Copyright © ATSG 2006
Updated August, 2006
The USA built BAXA and the Japan built MAXA and the M6HA transaxle is part of a new generation of 3 shafttransaxles. The features that make these units unique are the use of 6 solenoids, 2 pressure switches and NO one-way clutches.This new generation transaxle's PCM has a unique solenoid strategy to control shift overlap for upshifts anddownshifts. The PCM also requires a full complement of sensors to control shift timing and shift feel.All pertinent information for tear-down and assembly as well as some electrical diagnosis, covering 1997 to2001 models, has been included in this manual.
AUTOMATIC TRANSMISSION SERVICE GROUP 18639 S.W. 107TH AVENUEMIAMI, FLORIDA 33157
(305) 670-4161
MIKE SOUZATECHNICAL CONSULTANT
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HONDA ACCORD BAXA/MAXAHONDA PRELUDE M6HA
SHIFT CONTROLSOLENOID "C"
(SCS"C")BROWN CONNECTOR
SHIFT CONTROLSOLENOID "B"
(SCS"B")BLACK CONNECTOR
CLUTCH PRESSURE CONTROL SOLENOID "B"
(CPCS"B")BLACK CONNECTOR
MAINSHAFT SPEED SENSOR
COUNTERSHAFT SPEED SENSOR
CLUTCH PRESSURE CONTROL SOLENOID "A"
(CPCS"A")BROWN CONNECTOR
3rd GEAR PRESSURE SWITCH
(Accord Only)
2nd GEAR PRESSURE SWITCH
SHIFT CONTROLSOLENOID "A"
(SCS"A")
LOCK-UPCONTROL SOLENOID
(LUCS)
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BAXA/MAXA/M6HACLUTCH APPLICATION CHART
AUTOMATIC TRANSMISSION SERVICE GROUP
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HONDA PRELUDE M6HACOMPONENT LOCATOR
TRANSMISSIONCONTROL MODULE (TCM)
ENGINE CONTROLMODULE (ECM)
2ND CLUTCH
PRESSURE SWITCH
"A & B" CLUTCHPRESSURE CONTROLSOLENOID ASSEMBLY
SHIFT CONTROLSOLENOID "C"
SHIFT CONTROLSOLENOID "B"
LOCK-UP CONTROL&SHIFT CONTROL
SOLENOID "A" ASSEMBLY
COUNTERSHAFT
SPEED SENSOR
A/T GEAR
POSITION SWITCH
MAINSHAFTSPEED SENSOR
VEHICLESPEED SENSOR
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8
1 s t C l u t c h
3 r d C l u t c h
3 r d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
P r e
s s u r e S w i t c h
2 n d C l u t c h
4 t h C l u t c h
" O N "
E N G A G E M E N T F R O M N E U T R A L T O
R E V E R S E A N D R E V E R S E S O L E N O I D A P P L I C A T I O N
N E U T R A L T O R E V E R S E T R A N S I T I O
N
R E V E R S E
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
G e a r
G e a r
P r e s s u r e M o d e
P r e s s u r e M o d e
S C S " A "
S C S " A "
S C S " B "
S C S " B "
S C S " C "
S C S " C "
C P C S " A "
C P C S " A "
C P C S " B "
C P C S " B "
L U C
S
L U C
S
D 4
D 4
R R
O F F
O F F
O N
O N
O N
O F F
O F F
O F F
m o d u l a t i n g
O F
F
O F
F
O F F
C P C
L I N E
S u m m a r y : S h i f t S o l e n o i d " C " i s O N w h i c h s h
u t s o f f o i l t o t h e b o r e p l u g s i d e o f t h e R e v e r s e C P C v a l v e . L i n e P r e s s u r e
i s s e n
t t o t h e R e v e r s e C P C v a l v e w h i c h i s c o n t r o l l e d b y t h e m o d u l a t i o n o f C l u t c h P
r e s s u r e C o n t r o l S o l e n o i d v a l v e
" A " . T h i s c o n t r o l s t h e a p p l i c a t i o
n o f t h e 4 t h c l u t c h v i a t h e S e r v o V a l v e
a n d M a n u a l V a l v e .
S u m m a
r y : S h i f t S o l e n o i d " C " i s t u r n e d O F F
w h i c h s t r o k e s t h e R e v e r s e C P C v a l v e . T h i s s w i t c h e s 4 t h c l u t c h p r e s s u r e
f r o m C P C m o d e t o L i n e p r e s s u r e m o d e v i a t h e S e r v o V a l v e a n d M
a n u a l V a l v e .
N E U T R A L
S e l e c t o r p o s i t i o n
G e a r
P r e s s u r e M o d e S C S " A "
S C S " B " S C S " C "
C P C S " A " C P C S " B " L U C
S
N
N
O F F
O N
O F F
O F F
O F F
O F
F
n / a
SOLENOID CONTROL
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SOLENOID CONTROL
AUTOMATIC TRANSMISSION SERVICE GROUP
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1 s t C l u t c h
" O N "
3 r d C l u t c h
3 r d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
4 t h C l u t c h
E N G A G E M E N T F R O M N E U T R A
L T O D 4 " 1 s t " G E A R S O L E N O I D A P P L I C A T I O N
N E U T R A L
N E U T R A L T O
D 4 - 1 s t G E A R T R A N S I T I O N
D 4 - 1 s t G E A R
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
G e a r
G e a r
G e a r
P r e s s u r e M o d e
P r e s s u r e M o d e
P r e s s u r e M o d e
S C
S " A "
S C
S " A "
S C
S " A "
S C S " B "
S C S " B "
S C S " B "
S C S " C "
S C S " C "
S C S " C "
C P C S " A "
C P C S " A "
C P C S " A "
C P C S " B "
C P C S " B "
C P C S " B "
L U C S
L U C S
L U C S
N D 4
D 4
N 1 s t
1 s t
O F F
O N
O F F
O N
O N
O N
O F F
O N
O N
O F F
m o d u l a t i n g
O F F
O F F
O F F
O F F
O F F
O F F
O F F
n / a
C P C
L I N E
S u m m a r y : S h i f t S o l e n o i d s " A " a n d " C " a r e t u
r n e d O N t o c o n n e c t 1 s t c l u t c h a p p l y o i l t o t h e s p r i n g s i d e a n d c e n t e r o f
C P C v a l v e " A . " C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " A " o i l m o d u l a t e s o n t h e b o r e p l u g s i d e o f C P C v a l v e " A "
t o c o n t r o l 1 s t c l u t c h a p p l i c a t i o n . T h e 1 s t c l u t c h i s a p p l i e d w i t h r e d u c e d p r e s s u r e , w h i c h i s C P C m o d e .
S u m m a r
y : S h i f t S o l e n o i d " A " i s t u r n e d O F F w
h i c h s w i t c h e s t h e p o r t o n S h i f t V a l v e " A " f r o m C P C t o L i n e P r e s s u r e .
1 s t C l u t c
h p r e s s u r e i s n o w L i n e P r e s s u r e
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SOLENOID CONTROL
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1 s t C l u t c h
3 r d C l u t c h
3 r d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
P r e s s u r e S w i t c h
" O N "
2 n d C l u t c h
" O N "
4 t h C l u t c h
" 1 s t " T O " 2 n d " U P S H I F T A N D " 2 n d " G E A R S O L E N O I D A P P L I C A T I O N
D 4 - 1 s t G E A R
D 4 - 1 s t T O 2 n d G E A R T R A N S I T I O N
D 4 - 2 n d G E A R
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
G e a r
G e a r
G e a r
P r e s s u r e M o d e
P r e s s u r e M o d e
P r e s s u r e M o d e
S C S " A "
S C S " A "
S C S " A "
S C S " B "
S C S " B "
S C S " B "
S C S " C "
S C S " C "
S C S " C "
C P C S " A "
C P C S " A "
C P C S " A "
C P C S " B "
C P C S " B "
C P C S " B "
L U C
S
L U C
S
L U C
S
D 4
D 4
D 4
2 n d
2 n d
1 s t
O N
O N
O F F
O N
O N
O N
O N
O N
O N
O N
m o d u l a t i n g
m o d u l a t i n g
O F F
O F F
O F
F
O F
F
O F F
O F
F
C P C
L I N E
L I N E
S u m m a r y : S h i f t S o l e n o i d s " A " a n d " C " a r e t u r n e d O N t o c o n n e c t 1 s t c l u t c h a p p l y o i l t o t h e s p r i n g s i d e a n d c e n t e r o f
C P C v a
l v e " A . " C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " A " o i l m o d u l a t e s o n t h e b o r e p l u g s i d e o f C P C v a l v e " A "
w h i c h t u r n s 1 s t c l u t c h p r e s s u r e b a c k t o C P C m o d e . C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " B " o i l m o d u l a t e s o n t h e
b o r e p l u g s i d e o f C P C v a l v e
" B " w h i c h c o n t r o l s t h e a p p l i c a t i o n o f
t h e 2 n d c l u t c h .
S u m m a r y : S h i f t S o l e n o i d " C " i s t u r n e d O F
F w h i c h s w i t c h e s 2 n d c l u t c h p r e s s u r e
t o L i n e p r e s s u r e m o d e v i a t h e
M a n u a l v a l v e , a n d c o n n e c t s t h e 1 s t c l u t c h t o a n e x h a u s t v i a S h i f t V a l v e " C . " C l u t c h
P r e s s u r e C o n t r o l S o l e n o i d v a l v e
" A " i s t u r n e d o n t o b l o c k
p r e s s u r e f r o m t h e b o r e p l u g s i d e o f C P
C v a l v e " A . "
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1 s t C l u t c h
3 r d C l u t c h
" O N "
3 r d C l u t c h
P r e s s u r e S w i t c h
" O N "
2 n d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
4 t h C l u t c h
" 2 n d " T O " 3 r d " U P S H I F T A
N D " 3 r d " G E A R S O L E N
O I D A P P L I C A T I O N
D 4 - 2 n d T
O 3 r d G E A R T R A N S I T I O N
D 4 - 3 r d G E A R
D 4 - 2 n d G E A R
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
G e a r
G e a r
G e a r
P r e s s u r e M o d e
P r e s s u r e M o d e
P r e s s u r e M o d e S
C S " A "
S
C S " A "
S
C S " A "
S C S " B "
S C S " B "
S C S " B "
S C S " C "
S C S " C "
S C S " C "
C P C S " A "
C P C S " A "
C P C S " A "
C P C S " B "
C P C S " B "
C P C S " B "
L U C
S
L U C
S
L U C
S
D 4
D 4
D 4
3 r d
3 r d
2 n d
O N
O N
O N
O F F
O F F
O N
O F F
O F F
O N
O F F
O N
m o d u l a t i n g
m o d u l a t i n g
O F
F
O F
F
O F
F
O N
O F F
C P C
L I N E
L I N E
S u m m a r y : S h i f t S o l e n o i d " B " i s t u r n e d O F
F , w h i c h s t r o k e s S h i f t V a l v e B , t o c o n n e c t t h e 2 n d c l u t c h b a c k t o C P C
v a l v e
" B . " 2 n d c l u t c h p r e s s u r e i s c h a n g e d t o C P C m o d e t h r u t h e m o d u l a t i o n o f C l u t c h P r e s s u r e C o n t r o l S o l e n o i d
v a l v e "
B " a c t i n g o n t h e b o r e p l u g s i d e o f C P C v a l v e " B . " C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " A " a c t i n g o n t h e
b o r e p l u g s i d e o f C P C v a l v e " A " c o n t r o l s t h e a p p l i c a t i o n o f t h
e 3 r d c l u t c h .
S u m m
a r y : S h i f t S o l e n o i d " C " i s t u r n e d O N w h i c h s t r o k e s S h i f t V a l v e " C " a n d s w i t c h e s 3 r d c l u t c h p r e s s u r e t o L i n e
p r e s s u r e m o d e v i a t h e M a n u a l v a l v e ,
a n d c o n n e c t s t h e 2 n d c l u t c h t o a n e x h
a u s t v i a S h i f t V a l v e " C . "
SOLENOID CONTROL
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SOLENOID CONTROL
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1 s t C l u t c h
3 r d C l u t c h
3 r d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
P r e s s u r e S w i t c h
2 n d C l u t c h
4 t h C l u t c h
" O N "
" 3
r d " T O " 4 t h " U P S H I F T A
N D " 4 t h " G E A R S O L E N O I D A P P L I C A T I O N
D 4 - 3 r d T
O 4 t h G E A R T R A N S I T I O N
D 4 - 4 t h G E A R
D 4 - 3 r d G E A R
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
S e l e c t o r p o s i t i o n
G e a r
G e a r
G e a r
P r e s s u r e M o d e
P r e s s u r e M o d e
P r e s s u r e M o d e S
C S " A "
S
C S " A "
S
C S " A "
S C S " B "
S C S " B "
S C S " B "
S C S " C "
S C S " C "
S C S " C "
C P C S " A "
C P C S " A "
C P C S " A "
C P C S " B "
C P C S " B "
C P C S " B "
L U C
S
L U C
S
L U C
S
D 4
D 4
D 4
4 t h
4 t h
2 n d
O F F
O F F
O N
O F F
O F F
O F F
O N
O N
O F F
O N
O F F
m o d u l a t i n g
m o d u l a t i n g
O F
F
O F
F
O F
F
O F F
O N
C P C
L I N E
L I N E
S u m m
a r y : S h i f t S o l e n o i d " A " i s t u r n e d O F F , w h i c h s t r o k e s S h i f t V a l v e " A , " t o c o n n e c t t h e 3 r d c l u t c h b a c k t o C P C
v a l v e
" A " . " 3 r d c l u t c h p r e s s u r e i s t u r n e d t o C P C m o d e t h r u t h e m o d u l a t i o n o f C l u t c h P r e s s u r e C o n t r o l S o l e n o i d
v a l v e " A " a c t i n g o n t h e b o r e p l u g s i d e o f C P C v a l v e " A . " C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " B " o i l a c t s o n t h e
b o r e p l u g s i d e o f C P C v a l v e " B " w h i c h c o n t r o l s t h e a p p l i c a t i o n o f t h e 4 t h c l u t c h .
S u m m a
r y : S h i f t S o l e n o i d " C " i s t u r n e d O F F
w h i c h s t r o k e s S h i f t v a l v e " C . " T h i s s w
i t c h e s 4 t h c l u t c h p r e s s u r e t o L i n e
p r e s s u r e v i a t h e M a n u a l v a l v e . C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " A " i s O N t o b l o c k p r e s s u r e t o t h e b o r e p l u g
s i d e o f C P C v a l v e " A . " T h e 3 r d c l u t c h i s c o n n e c t e d t o a n e x h a u s t v i a S h i f t V a l v e " C . "
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LOCK-UP CONTROLThe Lock-up Solenoid is an 'ON/OFF" solenoid which strokes the lock-up shift valve to turn lock-up "ON".The PCM/TCM controls lock-up apply feel by the use of the A/T Clutch Pressure Control Solenoids actingon the lock-up control and timing valves as soon as the Lock-up Solenoid is turned "ON" providing partialand full lock-up. Accord models attain lock-up in 3rd and 4th gears. Prelude models attain lock-up in 2nd,3rd and 4th gears.
D 4 - 4 t h G E A R - T C C A P P L I E D
S e l e c t o r p o s i t i o n
G e a r
P r e s s u r e M o d e
S C S " A "
S C S " B "
S C S " C "
C P C S " A "
C P C S " B " L U C S
D 4
4 t h
O F F
O F F
O N
m o d u l a t i n g
O N
O F F
L I N E
S u m m a r y : T h e L o c k - u p C o n t r o l S o l e n o i d i s t u r n e d O N w h i c h d r a i n s t h e o i l o n t h e
s p r i n g s i d e o f
t h e L o c k - u p s h i f t v a l v e . T h e c o m p u t e r c o n t r o
l s t h e s w i t c h i n g o f P a r t i a l , H a l f , a n d F
u l l C o n v e r t e r
C l u
t c h a p p l i c a t i o n t h r u t h e m o d u l a t i o n o f t h e C l u t c h P r e s s u r e C o n t r o l S o l e n o i d
v a l v e " A "
a c t i n g o n t h e L o c k - u p t i m i n g a n d c o n t r o l v a l v e . E x a m p l e : W h e n C l u t c h P r e s s u r e C o n t r o l
S o
l e n o i d v a l v e " A " p r e s s u r e i s l o w , a n d t h e L o c k - u p C o n t r o l S o l e n o i d i s O N , t h e T o r q u e
C o
n v e r t e r C l u t c h i s a p p l i e d p a r t i a l l y . W h
e n C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " A "
S u m m a r y : T h e L o c k - u p C o n t r o l S o l e n o i d i s t u r n e d O N w h i c h d r a i n s t h e o i l o n t h e
s p r i n g s i d e o f
t h e L o c k - u p s h i f t v a l v e . T h e c o m p u t e r c o n t r o
l s t h e s w i t c h i n g o f P a r t i a l , H a l f , a n d F
u l l C o n v e r t e r
C l u
t c h a p p l i c a t i o n t h r u t h e m o d u l a t i o n o f t h e C l u t c h P r e s s u r e C o n t r o l S o l e n o i d
v a l v e " B "
a c t i n g o n t h e L o c k - u p t i m i n g a n d c o n t r o l v a l v e . E x a m p l e : W h e n C l u t c h P r e s s u r e C o n t r o l
S o
l e n o i d v a l v e " B " p r e s s u r e i s l o w , a n d t h e L o c k - u p C o n t r o l S o l e n o i d i s O N , t h e T o r q u e
C o
n v e r t e r C l u t c h i s a p p l i e d p a r t i a l l y . W h
e n C l u t c h P r e s s u r e C o n t r o l S o l e n o i d v a l v e " B "
T O R Q U E C O N V E R T E
R C L U T C H E N G A G E M E N T
D 4 - 3 r d G E A R - T C C A P P L I E D
S e l e c t o r p o s i t i o n
G e a r
P r e s s u r e M o d e
S C S " A "
S C S " B "
S C S " C "
C P C S " A "
C P C S " B " L U C S
D 4
2 n d
O N
O F F
m o d u l a t i n g
O F F
O N
O N
L I N E
T O R Q U E C O N V E R T E R
C L U T C H " O F F "
T O R Q U E C O N V E R T E R
C L U T C H " P A R T I A L A P P L I C A T I O N
"
T O R Q U E C O N V E R T E R
C L U T C H " H A L F A P P L I C A T I O N "
T O R Q U E C O N V E R T E R
C L U T C H " F U L L A P P L I C A T I O N "
T C C
C L U T C H
T C C
C L U T C H
T C C
C L U T C H
T C C
C L U T C H
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SOLENOID CHECK AND OPERATION
LOCK-UP CONTROL AND SHIFT CONTROL SOLENOID "A" OFF
LOCK-UP CONTROL AND SHIFT CONTROL SOLENOID "A" ON
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1 4 1
1 4 1
LOCK-UP CONTROL SOLENOID
LOCK-UP CONTROL SOLENOID
MODULATING VALVE PRESSURE TO LOCK-UP
SHIFT VALVE (spring side)
MODULATING VALVE PRESSURE TO LOCK-UP
SHIFT VALVE (spring side)
MODULATING VALVE PRESSURE TO SHIFT
VALVE "A"
MODULATING VALVE
PRESSURE TO SHIFT VALVE "A"
SHIFT CONTROL SOLENOID "A"
SHIFT CONTROL SOLENOID "A"
solenoid gasket
solenoid gasket
XBLOCKED
XBLOCKED
X
X
When the Lock-up control Solenoid is OFF, Modulating Pressure is HIGH, which prevents the Lock-up Shift Valve from stroking.
When Shift Control Solenoid "A" is OFF, Modulating Pressure is HIGH, which strokes Shift Valve "A."
When the Lock-up control Solenoid is ON, Modulating Pressure is EXHAUSTED, which allows the Lock-up ShiftValve to stroke.
When Shift Control Solenoid "A" is ON, Modulating Pressure is EXHAUSTED, which allows Shift Valve "A" tobe held to the right by its spring.
CONNECTED
CONNECTED
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SOLENOID CHECK AND OPERATION
SHIFT CONTROL SOLENOID "B" AND "C" OFF
SHIFT CONTROL SOLENOID "B" AND "C" ON
X
X
X
X
FROM MODULATORVALVE
FROM MODULATORVALVE
FROM MODULATORVALVE
FROM MODULATORVALVE
TO SHIFT VALVE "B" AND SERVO
CONTROL VALVE
FROM SHIFT VALVE "B" AND SERVO
CONTROL VALVE
TO SHIFT VALVE "C" AND REVERSE
CPC VALVE
FROM SHIFT VALVE "C" AND REVERSE
CPC VALVE
SCS "B"ON
(black connector)
SCS "B"OFF
(black connector)
SCS "C"ON
(brown connector)
SCS "C"OFF
(brown connector)
Summary: When Shift Control Solenoid "B" and "C" are OFF, oil from the Modulating valve isapplied to stroke the valves that the solenoids control.
CONNECTED
CONNECTED
CONNECTED
CONNECTED
Summary: When Shift Control Solenoid "B" and "C" are ON, oil from the Modulatingvalve is blocked at the end of the solenoid. The valves, that the solenoids control, are
connected to the exhaust at the top of the solenoid.
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From Modulating Valve( Solenoid regulator)
From Modulating Valve( Solenoid regulator)
Pressure port
Pressure port
To CPC valve "A" Reverse CPC valve
Shift valve "C"
To CPC valve "A" Reverse CPC valve
Shift valve "C"
To CPC valve "B" Shift valve "C" Shift valve "D"
To CPC valve "B" Shift valve "C" Shift valve "D"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE OPERATION "OFF"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE OPERATION "ON"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE "B"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE "A"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE "A"
CLUTCH PRESSURE CONTROL SOLENOID AND VALVE "B"
CLUTCH PRESSURECONTROL
SOLENOIDS "OFF"
CLUTCH PRESSURECONTROL
SOLENOIDS "ON"
X
X
X
X
Clutch Pressure Control Solenoid and Valve "A" supply modulating pressure to CPC valve "A", ReverseCPC valve and Shift valve "C" when "OFF."
Clutch Pressure Control Solenoid and Valve "B" shut off the supply of modulating pressure to CPC valve
Clutch Pressure Control Solenoid and Valve "A" shut off the supply of modulating pressure to CPC valve"A", Reverse CPC valve and Shift valve "C" when "ON."
Clutch Pressure Control Solenoid and Valve "B" supply modulating pressure to CPC valve "B", Shiftvalve "C" and Shift Valve "D" when "ON."
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CLUTCH PRESSURE CONTROL SOLENOID
VALVE "A" OFF
CLUTCH PRESSURE
CONTROL SOLENOIDVALVE "A" ON
CLUTCH PRESSURE CONTROL SOLENOID
VALVE "B" OFF
CLUTCH PRESSURE CONTROL SOLENOID
VALVE "B" ON
APPLY AIR
PRESSURE HERE
APPLY AIR PRESSURE HERE
AIR WILL EXHAUSTTHRU THIS HOLE
AIR WILL EXHAUST
THRU THIS HOLE
AIR IS BLOCKEDTO THIS HOLE
AIR IS BLOCKEDTO THIS HOLE
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CLUTCH PRESSURE CONTROL SOLENOID VALVES "A" AND "B" OFF
SOLENOID CHECK AND OPERATION
SOLENOID CHECK AND OPERATION
CLUTCH PRESSURE CONTROL SOLENOID VALVES "A" AND "B" ON
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PRESSURE SWITCH CHECK AND OPERATION2nd OR 3rd GEAR PRESSURE SWITCH "OFF"
2nd OR 3rd GEAR PRESSURE SWITCH "ON"
0.L
.001
OFF
OFF
RPM
RPM
RPM
RPM
COM
COM
mA
mA
A
A
V
V
V
V
mV
mV
V
V
mA A
mA A
mA A
mA A
NO PRESSURE APPLIED
40-100 psi.OF PRESSURE
APPLIED
CLOSED AT APPROXIMATLY
40 psi.
SUMMARY: THE 2nd AND 3rd GEAR PRESSURE SWITCHES ARE "OPEN" WITH NO PRESSURE APPLIED
SUMMARY: THE 2nd AND 3rd GEAR PRESSURE SWITCHES "CLOSE" WHEN 40-100 psi. OF PRESSURE IS APPLIED TO THE SWITCH.
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CLUTCH PRESSURE CONTROLThe PCM/TCM regulates the A/T Clutch Pressure Control Solenoids "A" and "B" thereby controllingall clutch apply pressure via the clutch pressure control (CPC) valves as well as lock-up apply
pressure.
SOLENOID CONTROL
SEQUENTIAL SPORTSHIFT MODE (PRELUDE ONLY)When in the D4 position, while sliding the shift lever to the Sequential Sportshift Mode position, thedriver can use the shift lever to upshift and downshift similar to the operation of a manualtransmission.Pushing the shift lever towards the "+" indicator results in an upshift to the next higher gear.Pushing the shift lever towards the "-" indicator results in a downshift to the next lower gear.The number of the selected gear is displayed in the shift indicator next to the D4 indicator as seenbelow. The transmission does not automatically shift, it remains in the selected gear position.
The transmission will upshift or downshift automatically under the following conditions:1. Downshift from 4th to 3rd when more power is required such as when climbing a hill.2. Provide engine braking when on a steep incline.3. Downshift to 1st gear when the vehicle comes to a stop.4. Under proper conditions, the PCM/TCM will allow a downshift to avoid engine overreving.5. A coast downshift will occur to a lower gear when vehicle speed drops low enough to require the
downshift signal at which time the shift indicator will flash several times to indicate a lower gear position.
SPORTSHIFT MODESHIFT INDICATOR
2
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GRADE LOGIC CONTROL SYSTEM
The PCM/TCM compares actual driving conditions with memorized driving conditions, by the use of aFuzzy Logic System and input from various sensors to control shifting while the vehicle is ascending ordescending a hill, or during speed reduction.
ASCENDING CONTROLWhen the computer determines that the vehicle is climbing a hill in the D4 or D3 positions, the GradeLogic System extends the engagement area of 2nd and 3rd gear to prevent the transmission fromfrequently shifting between 2nd and 3rd gears, and between 3rd and 4th gears in order to shiftbusyness and to also have adequate power.Shift schedules stored in the computer between 2nd and 3rd gears, and between 3rd and 4th gears,enable the computer's Fuzzy Logic to automatically select the most suitable gear according to how steepthe hill is as shown in the graph below.
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DESCENDING CONTROLWhen the computer determines that the vehicle is going down a hill in D4 or D3 positions, the closedthrottle upshift speed from 3rd to 4th gear and from 2nd to 3rd becomes faster than the set speed for flat
road driving to widen the 3rd and 2nd gear driving area. This in conjunction with engine braking fromdeceleration lock-up, achieves smooth driving when the vehicle is descending. There a two descendingmodes with different 3rd and 2nd gear driving areas depending on the gradient encountered as seen inthe graph below.
GRADE LOGIC CONTROL SYSTEM
DECELERATION CONTROLWhen the vehicle turns a corner and needs to decelerate first and then accelerate, the computer sets thedata for deceleration control to reduce the number of times the transmission shifts. When the vehicle isdecelerating from speeds above 27 mph (43 km/h), the computer shifts the transmission from 4th to 2ndgear earlier than normal to cope with upcoming acceleration.
IMPORTANT NOTE:
NEVER ROAD TEST A VEHICLE EQUIPPED WITH GRADE LOGIC CONTROL ON ALIFT!
THE VEHICLE WILL SHIFT HUNT AND/OR SKIP A GEAR, THE GRADE CONTROLSYSTEM BECOMES CONFUSED WITH THE WHEELS OFF THE GROUND AND WILLCOMMAND THE SHIFT SOLENOIDS IN SUCH A MANNER THAT IT WILL APPEAR TOBE A TRANSMISSION MALFUNCTION!
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CODE RETRIEVAL PROCEDURE (ACCORD)
RETRIEVE CODES When the PCM/TCM senses an abnormality, the "D4" Lamp will begin to flash steadily as seen below.
In some instances the "MIL" Lamp will also be illuminated, check for those related codes first.Connect an OBD-II scan tool conforming to SAE J1978, to the Data Link Connector (DLC), as shownbelow, and check for codes in the generic category, and the transmission control system as well asany other system codes that may be pertinent. Also check for recorded freeze frame information andrefer to the code chart shown beginning on page15.
D4 LAMP FLASHESWHEN A FAULT IS
PRESENT
DATA LINKCONNECTOR
(DLC)
OBD-IISCAN TOOL
MILLAMP
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CLEAR CODES Reset the PCM/TCM memory with the scan tool or remove the 7.5 AMP BACK-UP FUSE from thepassenger side under dash fuse box as shown below.
IMPORTANT NOTE:Remember to obtain the radio anti-theft codes so they may reinstalled in the event they are lost during thecode clearing process.
PASSENGER SIDEUNDER DASH
FUSE BOX
7.5 AMPBACK-UP FUSE
REMOVE THIS FUSETO CLEAR CODES
CODE CLEARING PROCEDURE (ACCORD)
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CODE RETRIEVAL PROCEDURE (PRELUDE)
RETRIEVE CODES When the PCM/TCM senses an abnormality, the "D4" Lamp will begin to flash steadily as seen below.The Prelude offers two methods of code retrieval:
1. Connect an OBD-II compliant scan tool to the 16 pin Data Link Connector (DLC) shown, below left.2. Locate the 2 pin Service Check Connector, shown below right, and jump the SCS connector with the tool shown or a suitable substitute and read the "flash" codes shown in () found in the code chart beginning on page 15.
16 PINDATA LINK CONNECTOR
FOR SCAN TOOL USE
2 PIN SERVICECHECK CONNECTOR
D4 LAMPFLASHES STEADILY
JUMP SERVICECONNECTOR FOR
FLASH CODES
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DTC 2
DTC 15
2 SHORT FLASHES
1 LONG FLASH
5 SHORT FLASHES
CODE RETRIEVAL PROCEDURE (PRELUDE)
The "flash" code format is shown directly below. Single digit codes are indicated by individual shortflashes.Two digit codes are indicated by long flashes followed by short flashes.
CODE CLEARING PROCEDURE (PRELUDE)
CLEAR CODES Reset the PCM/TCM memory with the scan tool or remove the 7.5 AMP BACK-UP FUSE from theunder hood fuse box for at least 10 seconds as shown below.
IMPORTANT NOTE:Remember to obtain the radio anti-theft codes so they may reinstalled in the event they are lost during thecode clearing process.
UNDER HOODFUSE BOX
REMOVE 7.5 AMPBACK-UP FUSE
TO CLEAR CODES
7.5
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*DTC D4 LAMP MIL LAMP SYMPTOM POSSIBLE CAUSE
P0715
(15) ON·Erratic Shifting ·Faulty Mainshaft Speed Sensor
or Circuit
P0720(9) FLASHES ON
·Erratic Shifting·No 4th Gear ·No Lock-up·No Speedometer (Accord Only)
·Faulty Countershaft Speed Sensor or Circuit
P0725(11) OFF OFF
·No Lock-up (Prelude Only) ·Loss of Engine RPM Signal·Faulty Distributor/Ignition Coil·Wire or Connection·Faulty Ignition Coil
P0730(41)
OFF ON
·Failure to shift through the gears·Skipped Shifts
·Mechanically Bad Shift Solenoids·Mechanically Bad A/T Pressure·Control Solenoids·Low Clutch Pressure·Internal Component Slipping
P0740(40)
OFF ON
·Lock-up Clutch Does Not Apply·Lock-up Clutch Does Not Disengage
·Mechanically Bad Lock-up·Control Solenoid·Mechanically Bad A/T Pressure·Control Solenoids·Lock-up Shift, Control or Timing Valve Problems·Faulty Torque Converter ·Faulty Speed Sensor
P0753(7) ONFLASHES
FLASHES
·Does Not Shift, Stuck in 4th Gear ·Fails to Shift to 4th Gear ·Erratic Shifting
·Electrically Bad Shift Solenoid 'A'·Shift Solenoid "A" Circuit Fault
P0758(8)
FLASHES ON
·Electrically Bad Shift Solenoid 'B'·Shift Solenoid "B" Circuit Fault
·3rd Gear Starts·Fails to Shift to 1st or 2nd Gear ·Erratic Shifting
P0763(22)
FLASHES ON
·Electrically Bad Shift Solenoid 'C'·Shift Solenoid "C" Circuit Fault·Faulty 2nd Clutch Pressure Switch·Faulty 3rd Clutch Pressure
Switch (Accord Only)
·Late Shift From N to D or N to R·Excessive Shock or Flare on 1-2,2-3 or 3-4 Shift
·Excessive Shock or Flare on 2-1, 3-2 or 4-3 Shift
P0780(45)
FLASHES ON
·Incorrect Gear Ratio·Mechanical Problem in Hydraulic System
·Mechanical Fault with ShiftSolenoid A, B or C
·Mechanical Fault with A/TPressure Control Solenoid A or B
·Internal Hydraulic Leak
*DTC's in parentheses is the code the D4 Lamp will flash when the 2 pin Service Connector is jumped (Prelude Only), or a Scan Tool capable of displaying flash codes is connected to the16 pin DLC
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DIAGNOSTIC TROUBLE CODE DEFINITION CHART
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*DTC D4 LAMP MIL LAMP SYMPTOM POSSIBLE CAUSE
P01655(37)**
ON
·Lock-up Does Not Apply ·Short or Open in SEAF Wire
Between TCM Terminal B18 and ECM·Short or Open in SEFA Wire Between TCM Terminal B19 andECM·Faulty ECM
P01705(5)
ON
P01706(6)
OFF ON
P01709(24)
FLASHES OFF
P01738(25) OFFOFF
FLASHES
·Slide, Bump On The 1-2 Shift·Flare On The 1-2 Shift
·2nd Clutch Pressure Switch Circuit Failure·Faulty 2nd Clutch Pressure Switch
P01739(26)
P01750(46)
FLASHES ON
·Incorrect Gear Ratio·Transmission Slipping
·Mechanical Fault with A/TPressure Control Solenoid A or B
·Internal Hydraulic Leak
FLASHES
·A/T Gear Position Switch Circuit Fault·Faulty A/T Gear Position Switch
·Erratic Shifts·Shift Quadrant Indicator Lamps Do Not Indicate Correct Gear Shift Position·Shift Lever Does Not Operate Properly
·A/T Gear Position Switch Circuit Fault·Faulty A/T Gear Position Switch
·Erratic Shifts·Shift Quadrant Indicator Lamps Do Not Indicate Correct GearShift Position
·Shift Lever Does Not Operate Properly
·Transmission Does Not Shift Into Sequential Sportshift Mode (Prelude Only)
·Mode Switch Circuit Faults·Faulty Mode Switch
OFFOFF
·Slide, Bump On The 2-3 Shift·Flare On The 2-3 Shift
·3rd Clutch Pressure Switch Circuit Failure·Faulty 3rd Clutch Pressure Switch
P01751(47)
FLASHES ON
·Incorrect Gear Ratio·Transmission Slipping
·Mechanical Fault with A/TPressure Control Solenoid A or B
·Mechanical Fault with ShiftSolenoid 'B'
·Internal Hydraulic Leak
*DTC's in parentheses is the code the D4 Lamp will flash when the 2 pin Service Connector is jumped (Prelude Only), or a Scan Tool capable of displaying flash codes is connected to the16 pin DLC **The D4 Indicator Lamp cannot flash code (37) even when the Service Check Connector is jumped.
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DIAGNOSTIC TROUBLE CODE DEFINITION CHART
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*DTC's in parentheses is the code the D4 Lamp will flash when the 2 pin Service Connector is jumped (Prelude Only), or a Scan Tool capable of displaying flash codes is connected to the16 pin DLC
*DTC D4 LAMP MIL LAMP SYMPTOM POSSIBLE CAUSE
P01753(1) ON
·Lock-up Does Not Apply ·Short or Open in Lock-up
Solenoid Circuit·Faulty Lock-up Solenoid
P01768(16)
ON
P01773(23)
P01790(3)
FLASHES ON
FLASHES
FLASHES
·A/T Clutch Pressure Control Solenoid 'A' Circuit Fault·Faulty A/T Clutch Pressure Control Solenoid 'A'
·Excessive Shock or Flares on Shifts·Lock-up Clutch Does Not Operate Smoothly·Lock-up Clutch does Not Apply
·Lock-up Clutch Does Not Apply (Prelude Only)
·Vehicle Speed Sensor Circuit Fault·Faulty Vehicle Speed Sensor
FLASHES ON
·Excessive Shock or Flares on Shifts·Lock-up Clutch Does Not Operate Smoothly·Lock-up Clutch does Not Apply
·A/T Clutch Pressure Control Solenoid 'A' Circuit Fault·Faulty A/T Clutch Pressure Control Solenoid 'A'
FLASHES ON
·Lock-up Clutch Does Not Apply ·Throttle Position Sensor CircuitFault
·Faulty Throttle position Sensor
P01791(4)
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Technical Service Information
28
DIAGNOSTIC TROUBLE CODE DEFINITION CHART
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TCM CIRCUIT DIAGRAM AND TERMINAL LOCATIONS (ACCORD)
2 3 4
121314151617
252627
5 6
1819
282930
20
8
21
9 10
23
32
24
1 2
9
19
10
20
11
3
12
21
4
13
22
5
14
23
16
2425
1718
7 8 1 2 3
1314
25
15
5
16
26
6
17
27
7
18
28
19
8
20
29
9
21
30
10 1
6
1314
7
2 3
8
15
9 10
16
11 12
5
PCM CONNECTOR TERMINAL LOCATIONS
32 PIN 25 PIN 31 PIN 16 PIN
CRUISE CONTROLUNIT
MULTIPLEXCONTROL UNIT(DRIVERS)
D4
D4 INDICATORLAMP
P
R
N
D4
D3
2
1
TRANSMISSIONRANGESWITCH
P R N D3 2 1
A/T GEAR POSITIONINDICATOR
INSTRUMENT CLUSTER
SOLENOID POWERSUPPLY
BRAKE LAMPS
BRAKE SWITCH
B+
DATA LINKCONNECTOR
ENGINE COOLANTTEMPERATURESENSOR
THROTTLEPOSITIONSENSOR
IGNITIONSWITCH
BATTERY
PGM-FIMAINRELAY
PGM-FICONTROLUNIT
TRANSMISSIONCONTROLMODULE
A/T CLUTCHPRESSURECONTROLSOLENOID 'A'
A/T CLUTCHPRESSURECONTROLSOLENOID 'B'
SHIFTSOLENOID 'A'
SHIFTSOLENOID 'B'
SHIFTSOLENOID 'C'
LOCK-UPSOLENOID
MAINSHAFTSPEED SENSOR
COUNTERSHAFT
SPEED SENSOR
2ND CLUTCHPRESSURE SWITCH
3RD CLUTCHPRESSURE SWITCH
A5
B24
B14
A28
D16
D10
D12
D11
D1
D3
D2
D7
B18
B25
B8
B17B8
B10
B1
B9
B21
C28
C27
C18
C26
A10
A32
B20
B22
D5
A9
D6
D9
D8
D14
D15
D13
A14
#13 7.5 AMP FUSE(PASSENGER UNDER DASH FUSE BOX)
#46 15 AMP FUSE(UNDER HOOD FUSE BOX)
#1 15AMPFUSE(DRIVER UNDER DASH FUSE BOX)
#42 50AMP FUSE(UNDER HOOD FUSE BOX)
#41 100AMP FUSE(UNDER HOOD FUSE BOX)
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Technical Service Information
29
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TCM CIRCUIT DIAGRAM AND TERMINAL LOCATIONS (PRELUDE)
15 16 17 19 20 21 22 23 25 26 12 13 14 15 16 17 18 19 20 21 22
3 4 5 6 7 8 9 10 11 12 13 1 4 5 7 8 9 10 112
14
T-MODE SWITCH
SHIFT SWITCH
MODE SWITCH
D4
D4 INDICATOR LAMP
D4
D3
P
R
N
2
1
A/T GEAR POSITIONINDICATOR
SHIFT INDICATOR
E N G I N E C O N T R O L M O D U L E ( E C M )
VEHICLE SPEEDSENSOR
THROTTLEPOSITIONSENSOR
DATA LINKCONNECTOR (DLC)
IGNITIONSWITCH
BATTERY
2ND CLUTCHPRESSURE SWITCH
BRAKE LAMPS
BRAKE SWITCH
IGNITIONCOIL
MULTIPLEXCONTROLUNIT
COUNTERSHAFTSPEED SENSOR
MAINSHAFTSPEED SENSOR
LOCK-UPSOLENOID
SHIFTSOLENOID 'C'
SHIFTSOLENOID 'B'
SHIFTSOLENOID 'A'
A/T PRESSURE CONTROLSOLENOID 'B'
A/T PRESSURE CONTROLSOLENOID 'A'
TRANSMISSIONCONTROLMODULE(TCM)
P R N 2 1D3
A12
A25
A23
B20
B4
B7
B18
B19
B5
A13
A26
A14
A21
A20
A19
A10
A11A4
A9
A8
A7
A6
A17
B13
B16
B15
B14
B12
A5
A22
B8
B9
B17
B10
A15
A16
A2
A3
B22
B11
B21
B1
BACK-UP B+
5 VOLT REFERENCE
TPS 5 VOLT SUPPLY
TPS SIGNAL
TPS GROUND
SEAF TRANSMISSION DATA OUTPUT
SEFA PGM-FI DATA INPUT
VSS INPUT
GROUND
GROUND
GROUND
#32 100 AMPFUSE(UNDER HOOD
FUSE BOX)
#14 15 AMPFUSE(UNDER DASH
FUSE BOX)
#43 7.5 AMP FUSE(UNDER HOOD FUSE BOX)
#33 50 AMPFUSE(UNDER HOOD
FUSE BOX)
26 PIN 22 PIN
TCM CONNECTOR TERMINAL LOCATIONS
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
30
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TROUBLESHOOTING GUIDE
PROBABLE CAUSE LIST
ELECTRONIC DEVICE FAMILY TORQUE CONVERTER FAMILY
TRANSMISSION FAMILY
HYDRAULIC CONTROL FAMILY
13 3rd clutch pressure switch defective (ACCORD ONLY)
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
31
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TROUBLESHOOTING GUIDE
SYMPTOM CHECK THESE ITEMS ON THEPROBABLE CAUSE LIST
CHECK THESE ITEMSON THE NOTES LIST
5, 13, G, J, P, Q, g, h
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
32
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TROUBLESHOOTING GUIDE
PROBABLE CAUSE LIST
ELECTRONIC DEVICE FAMILY TORQUE CONVERTER FAMILY
TRANSMISSION FAMILY
HYDRAULIC CONTROL FAMILY
13 3rd clutch pressure switch defective (ACCORD ONLY)
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
33
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TROUBLESHOOTING GUIDE
Flush transmission cooler
NOTES
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
34
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A/T GEAR POSITION SWITCH
1
10
2 34 5 6 7
8 9
GEARPOSITION
TERMINAL 1 2 3 4 5 6 7 8 9 10
P
R
N
D4
D3
2
1
CONNECTOR VIEWOF A/T GEAR
POSITION SWITCH
BATTERY
A/T GEAR POSITION SWITCH CONTINUITY CHECK CHART
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
35
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OIL PRESSURE CHART
ACCORD BAXA/PRELUDE M6HA
SELECTOR
LEVER
POSITION
GEAR PRESSURE
PORT
PRESSURE
IN
PSI
N or P N or P LINE (A)
1
D3 or D4
D4
FIRST 1ST CLUTCH (B)
SECOND 2ND CLUTCH (C)
THIRD 3RD CLUTCH (D)
FOURTH 4TH CLUTCH (E)
4TH CLUTCH (E)R REVERSE
120-130
CONDITIONS
ENGINE @ 2000 RPM
ENGINE @ 2000 RPM, WHEELS FREE
ENGINE @ 2000 RPM, WHEELS FREE
ENGINE @ 2000 RPM, WHEELS FREE
ENGINE @ 2000 RPM, WHEELS FREE
ENGINE @ 2000 RPM, WHEELS FREE
2
120-130
120-130
120-130
120-130
120-130
2ND CLUTCH PRESSURE(MARKED WITH A "C")
LINE PRESSURE(MARKED WITH AN "A")
TCC/SHIFT SOLENOID "A"ASSEMBLY
A/T GEARPOSITION SWITCH
4TH CLUTCH PRESSURE(MARKED WITH AN "E")
1ST CLUTCH PRESSURE(MARKED WITH A "B")
3RD CLUTCH PRESSURE(MARKED WITH A "D")
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
36
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FLUID LEVEL & CAPACITY
NOTE: Use of a fluid other than the recommended fluidmay cause shift quality concerns.If this is so, a friction modifier added to this fluid may benecessary.
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
37
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TRANSMISSION REMOVAL
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
38
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TRANSMISSION REMOVAL
(PRELUDE ONLY)
NOTE: Accords will have a3rd Clutch Pressure Switch to disconnect as well.
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
39
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TRANSMISSION REMOVAL
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
40
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TRANSMISSION REMOVAL
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
41
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TRANSMISSION REMOVAL
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
42
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TRANSMISSION DISASSEMBLY
END COVER & IDLER GEARS
ACCORD BAXA
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
43
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TRANSMISSION DISASSEMBLY
END COVER & IDLER GEARS
PRELUDE M6HA
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
44
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TRANSMISSION DISASSEMBLY
END COVER & IDLER GEARS
PRELUDE M6HA LEGEND
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
45
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
TRANSMISSION HOUSING
ACCORD BAXA
46
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
TRANSMISSION HOUSING
PRELUDE M6HA
FEED PIPESCONTAIN FILTER SCREENS
47
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
TRANSMISSION HOUSING
PRELUDE M6HA LEGEND
48
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
TRANSMISSION HOUSING REMOVAL
49
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
VALVE BODY
ACCORD BAXA
50
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
VALVE BODY
PRELUDE M6HA
51
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
TRANSMISSION DISASSEMBLY
VALVE BODY
PRELUDE M6HA LEGEND
52
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
53
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
PUMP CLEARANCE
54
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
MAIN VALVE BODY
55
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
MAIN VALVE BODY
No.
1 Lock-up Control Valve Spring
Servo Control Valve Spring
Reverse CPC Valve Spring
Spring
Modulator Valve Spring
Shift Valve C SpringShift Valve D Spring
Shift Valve E Spring
Lock-up Shift Valve Spring2
3
45
6
7
8
Standard (New) mm (in.)
Wire Diameter O.D. Free Length No. of Coils
0.7 (0.028) 42.9 (1.689) 14.2
0.9 (0.035)
6.6 (0.260)
63.0 (2.480) 22.4
0.7 (0.028)
7.6 (0.299)
32.2 (1.268) 13.4
0.7 (0.028)
6.6 (0.260)
35.7 (1.406) 17.20.8 (0.031)
1.6 (0.063)
0.7 (0.028)
0.7 (0.028)
6.6 (0.260)6.6 (0.260)
10.4 (0.409)
6.1 (0.240)
49.1 (1.933)
17.8 (0.701)
35.7 (1.406)
21.7
9.8
7.9
17.2
9
10
Converter Check Valve Spring
Cooler Check Valve Spring
1.1 (0.043)
0.6 (0.024)
6.6 (0.260)
8.4 (0.331)
5.8 (0.228)
33.5 (1.319)
38.2 (1.504)
14.5 (0.571) 6.8
14.0
56
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
No.
1 Regulator Valve B Spring
Spring
Lock-up Timing Valve Spring
Relief Valve Spring
Stator Reaction Spring
Regulator Valve A Spring2
3
4
5
Standard (New) mm (in.)
Wire Diameter O.D. Free Length No. of Coils
1.6 (0.063) 9.2 (0.362) 44.0 (1.732) 14.0
1.9 (0.075) 14.7 (0.579) 77.4 (3.047) 15.2
4.5 (0.177) 35.4 (1.394) 30.3 (1.193) 1.92
1.9 (0.035) 6.6 (0.260) 39.8 (1.567) 20.4
0.65 (0.026) 6.6 (0.260) 34.8 (1.370) 15.6
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
REGULATOR VALVE BODY
MAKE CERTAIN THISORIFICE IS CLEAR
57
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
SERVO VALVE BODY
No.
1 Shift Valve B Spring
4th Accumulator Spring (PRELUDE)
4th Accumulator Spring (ACCORD)
Spring
3rd Accumulator Spring (PRELUDE)
3rd Accumulator Spring (ACCORD)
CPC Valve B Spring
CPC Valve A Spring
Shift Valve A Spring2
3
4
5
6
7
8
Standard (New) mm (in.)
Wire Diameter O.D. Free Length No. of Coils
0.8 (0.031) 7.1 (0.280) 40.4 (1.591) 16.9
0.8 (0.031) 7.1 (0.280) 40.4 (1.591) 16.9
0.7 (0.028) 6.1 (0.240) 17.8 (0.701) 7.9
0.7 (0.028) 6.1 (0.240) 17.8 (0.701) 7.9
3.8 (0.150)
3.5 (0.138)
3.8 (0.150)
3.5 (0.138)
19.6 (0.772)
19.6 (0.772)
19.6 (0.772)
19.6 (0.772)
59.8 (2.354)
61.7 (2.429)
59.8 (2.354)
61.7 (2.429)
61.7 (2.429)
7.8
9.6
7.8
9.6
58
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA
ACCUMULATOR VALVE BODY
No.
1
2nd Accumulator Spring A
2nd Accumulator Spring B
Spring
1st Accumulator Spring A
1st Accumulator Spring B
2
3
4
Standard (New) mm (in.)
Wire Diameter O.D. Free Length No. of Coils
2.5 (0.098)
2.6 (0.102)
2.7 (0.106)
2.6 (0.102)
12.8 (0.504)
19.6 (0.772)
14.8 (0.583)
21.6 (0.850)
49.5 (1.949)
69.7 (2.744)
51.0 (2.008)
73.2 (2.882)
8.5
10.8
9.6
10.0
59
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
VALVE BODY DISASSEMBLY, INSPECTION & REASSEMBLY
PRELUDE M6HA
ACCUMULATOR VALVE BODY
No.
1
2nd Accumulator Spring A
2nd Accumulator Spring B
Spring
1st Accumulator Spring
2
3
Standard (New) mm (in.)
Wire Diameter O.D. Free Length No. of Coils
3.5 (0.138)
2.6 (0.102)
2.8 (0.110)
19.6 (0.772)
14.4 (0.567)
21.6 (0.850)
61.7 (2.429)
51.0 (2.008)
68.2 (2.685)
9.6
11.0
8.9
60
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
MAINSHAFT
2000-01
ACCORD
ONLY
LUBRICATION
PITOT
FLANGE
IDLER
GEAR
TRANSMISSION
HOUSING
BEARING
61
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Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
MAINSHAFT CLEARANCE
62
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
COUNTERSHAFT
63
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
SECONDARY SHAFT
64
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
SECONDARY SHAFT CLEARANCE
65
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
SECONDARY SHAFT CLEARANCE
No. Part No. (Accord) ThicknessPart No. (Prelude)
4.90mm (0.193 in)90406-P6H-00090406-POZ-0001
2 90407-POZ-000 90407-P6H-000 4.95mm (0.195 in)
3 90408-POZ-000 90408-P6H-000 5.00mm (0.197 in)
4 90409-POZ-000 90409-P6H-000 5.05mm (0.199 in)
5 90410-POZ-000 90410-P6H-000 5.10mm (0.201 in)
6 90411-POZ-000 90411-P6H-000 5.15mm (0.203 in)7 90412-POZ-000 90412-P6H-000 5.20mm (0.205 in)
NOTE: The chart above contains the part numbers for the 37x55mm
thrust shim for both the ACCORD and the PRELUDE.
Be sure to order the correct thrust shim for the application you
are working on.
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AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
1ST/2ND CLUTCH ASSEMBLIES
1.6mm (0.063 in.)
PRELUDE w/6 Frictions
2.3mm (0.091 in.)
ACCORD w/5 Frictions
The 1st clutch piston
does NOT use a reed valve
The 2nd clutch piston
does NOT use a reed valve
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ACCORD BAXA & PRELUDE M6HA
3RD/4TH CLUTCH ASSEMBLIES
The 3rd clutch piston
DOES use a reed valve
The 4th clutch piston
DOES use a reed valve
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ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
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ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
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ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
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DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
5. Reverse disassembly procedure for assembly.
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ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
CLUTCH SERVICE LIMIT
1st2nd (Prelude)
2nd (Accord)
1.15 - 1.35 mm (0.045 - 0.053 in.)
3rd4th
1.0 - 1.2 mm (0.039 - 0.047 in.)
0.7 - 0.9 mm (0.028 - 0.035 in.)
0.6 - 0.8 mm (0.024 - 0.031 in.)0.4 - 0.6 mm (0.016 - 0.024 in.)
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ACCORD BAXA & PRELUDE M6HA
CLUTCH DRUM ASSEMBLIES
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ACCORD BAXA & PRELUDE M6HA
DIFFERENTIAL
COMPONENTS BACKLASH INSPECTION
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ACCORD BAXA & PRELUDE M6HA
DIFFERENTIAL
BEARING REPLACEMENT DIFFERENTIAL CARRIER REPLACEMENT
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ACCORD BAXA & PRELUDE M6HA
DIFFERENTIAL
TAPERED ROLLER BEARING PRELOAD ADJUSTMENT
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ACCORD BAXA & PRELUDE M6HA
DIFFERENTIAL
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ACCORD BAXA & PRELUDE M6HA
DIFFERENTIAL
TAPERED ROLLER BEARING OUTER RACE
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ACCORD BAXA & PRELUDE M6HA
AXLE SEALS
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION CASE & HOUSING BEARINGS
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION CASE & HOUSING BEARINGS
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DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
TRANSMISSION CASE & HOUSING BEARINGS
NOTE:
After bearings are installed, make certain there is no
up and down movement of the bearings in the case,
if there is movement, the case will require replacement.
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DISASSEMBLY, INSPECTION & REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
PARK MECHANISM
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION REASSEMBLY
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION REASSEMBLY
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION REASSEMBLY
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ACCORD BAXA & PRELUDE M6HA
TRANSMISSION REASSEMBLY
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
NOTE: For 2000 and later models, install the pitot flange on the mainshaft idler gear, then install the lubrication pitot pipe
and the pitot pipe on the transmission housing.
LUBRICATION PITOTPIPE
PITOT PIPE
PITOT FLANGE
6 x 1.0 mm
12 N-m(1.2 kgf-m)
(8.7 lb. ft.)
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
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TRANSMISSION REASSEMBLY
ACCORD BAXA & PRELUDE M6HA
CONVERTER & DRIVE PLATE
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TRANSMISSION INSTALLATION
ACCORD BAXA & PRELUDE M6HA
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ACCORD BAXA & PRELUDE M6HA
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ACCORD BAXA & PRELUDE M6HA
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ACCORD BAXA & PRELUDE M6HA
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ACCORD BAXA & PRELUDE M6HA
99
MAINSHAFT
SPEED
SENSOR
A/T CLUTCH
PRESSURECONTROL
SOLENOIDS
A & B
HARNESS
CLAMPS
3RD CLUTCHPRESSURE
SWITCH
HARNESS
CLAMPS
GROUND
CABLE
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TRANSMISSION INSTALLATION
ACCORD BAXA & PRELUDE M6HA
COOLER LINE CONNECTIONS
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SPECIFICATIONS
ACCORD BAXA
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ACCORD BAXA
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ACCORD BAXA
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ACCORD BAXA
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ACCORD BAXA
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SPECIFICATIONS
PRELUDE M6HA
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PRELUDE M6HA
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PRELUDE M6HA
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SPECIAL TOOLS
ACCORD BAXA/PRELUDE M6HA
109
TOOL NUMBERREFERENCE NUMBER DESCRIPTION QUANTITY
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HONDA ACCORD1998 & LATER WITH BAXA/MAXA TRANSMISSION
DELAY IN REVERSE AND 1-2 BIND-UPHARSH DRIVE ENGAGEMENT
COMPLAINT:
CAUSE:
CORRECTION:
The transmission has been overhauled, and after the transmission is installed back intothe vehicle, the transmission delays in reverse and binds up on the 1-2 shift. A harshengagement into drive will also occur.
During the installation of the transmission the connectors for shift solenoids "B" and"C" were switched with the connectors for A/T Clutch Pressure Control solenoids "A"and "B".These connectors are identical in configuration (Refer to Figures 2 & 3) which permits
the cross connection of these solenoid connectors causing the above complaints.
When reconnecting these solenoid connectors, use the chart in figure 1 to insure thecorrect solenoid connections have been made.
NOTE: There are other Honda/Acura transaxles that are very similar to theBAXA/MAXA, causing the same possibility of cross connecting Shift Solenoid "A"and "B" connectors with A/T Clutch Pressure Control Solenoid connectors, these arelisted below:
B7XA...................................................................................1998-01 Honda Accord V6 M6HA......................................................................................1997-01 Honda Prelude
MDWA.................................................................1997-98 Honda Odyssey/Isuzu Oasis B7TA/B7YA.............................................................................1999-01 Honda Odyssey M7ZA...........................................................................................1996-99 Acura 3.0CL B6VA............................................................................................1998-99 Acura 2.3CL M7WA..........................................................................................1999-01 Acura 3.2TL
SOLENOID CONNECTOR WIRE COLORS
A/T CLUTCH PRESSURE CONTROL SOLENOID "A" WHITE AND RED
A/T CLUTCH PRESSURE CONTROL SOLENOID "B" GREEN AND ORANGE
SHIFT SOLENOID "B" GREEN/WHITE AND BLACK
SHIFT SOLENOID "C" GREEN AND BLACK
Figure 1
HONDA ACCORD L4 WITH BAXA/MAXA - SOLENOID CONNECTOR WIRE COLORS
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HONDA ACCORD1998 & LATER WITH BAXA/MAXA TRANSMISSION
DELAY IN REVERSE AND 1-2 BIND-UPHARSH DRIVE ENGAGEMENT
1 2
1 2
1 2
1 2
SHIFTSOLENOID
"B"
SHIFTSOLENOID
"C"
SHIFTSOLENOID "B"CONNECTOR
SHIFTSOLENOID "C"CONNECTOR
A/T CLUTCH PRESSURECONTROL SOLENOID
"B"
A/T CLUTCH PRESSURECONTROL SOLENOID
"A"
A/T CLUTCH PRESSURE
CONTROL SOLENOID"A"
CONNECTOR
A/T CLUTCH PRESSURECONTROL SOLENOID
"B"CONNECTOR
SHIFT SOLENOIDS "B" & "C" CONNECTORS HAVE SAME CONFIGURATION AS A/T CLUTCH PRESSURE CONTROL SOLENOIDS "A" & "B"
A/T CLUTCH PRESSURE CONTROL SOLENOIDS "A" & "B" CONNECTORS HAVE SAME CONFIGURATION AS SHIFT SOLENOIDS "B" & "C"
Figure 2
Figure 3
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Notes