ECT

ELECTRONIC CONTROL SYSTEM DIAGNOSTICS

2004 INTERNATIONAL TRUCK AND ENGINE CORPORATIONEGED-310-1

VEHICLE MOUNTED COMPONENTS

ENGINE MOUNTED COMPONENTS

IPR actuator

EOT MAT EOPswitch

ICP

MAF/IATsensor

BCSactuator

MAP

VT 275International

Body Builder

1A

RPM MPH

Instrument Panel

R

1 2

A/C clutchB+ at

Starter studAlternator

powerAlternator

control

1 2 3To starter solenoid

8 Pin connector

Act Pwr Gnd

IDM MPRIDM Logic Pwr

IDM Pwr Gnd

ALT I-SenseATA (-)ATA (+)

A/C Clutch (-)A/C Clutch (+)

IDM Main Pwr

12 Pin connector

VIGN

EGR valvecontroller

Mitsubishi EGR Valve

CKPO

VIGN

MAFSignal Ground

VREFAMAP

ICPEOPMATECTEOT

CMP (-)CMP/CKP SHD

CKP (+)

BCS

IPRGPCGPDIAHCIAHDOWL

CKPO

CAN 2 (+) CAN 2 (-)

CAN 2 SHD BOOBPS

CMPO

ATA (-)ATA (+)

ECM PWRECM PWRBattery Ground Battery Ground ECM MPRFPC

WIF RPRERVARA/C control

ECIFPM

TACHRASSCSCOO

AC demandCAN 1 (+)CAN 1 (-)

IAH relay

To battery power feed on starter

To battery powerfeed on starter

Glow plug relay

Glow plugs

Glow plugs

Diagnosticconnector A

(237) ED

CA B

JHG

F

WIFprobe

T-statswitch

A/C switchin control

head

In-cabcruise switches

To starter solenoid

Starter motor relay

A/Cclutch relay

40A

40A

Normally closedpressure switch

Normally openpedal switch

5A

5A

ECMrelay

10A

Fuel pump relay

20A

141516

1312

1

32

52341

67

E D C B A2 1

CAN 2 (+) R-LG

CAN 2 (+)CAN 2 (-)

IDM MPRIDM LOGIC PWRIDM MAIN PWRIDM MAIN PWR

ATA (+)

IDM GNDIDM GND

ATA (-)

C A A C

BPSBOO

Starter solOWL

IPR PWR

Act Pwr

IDMrelay

BAP

DDS

ACT PWR

4 CAN 2 (-)

ACT PWR GNDDB-LGBK

LB-W

Sensor Supply GroundPosition Sensor (W Phase)Position Sensor (V Phase)Position Sensor (U Phase)Sensor Supply R-PK

Y-WO-WBR-WBK-PK

2 3 12 3 12 1 12 1 2 1

CKP (-)

IAT

VIGN

10A

-+

-+

WARNING

NotesInformation on this form for vehicle mounted components was current at the time of publication. Updates may be made to introduce product improvements and technical advancements. See correct truck service manual for chassis wiring.

Colored lines on this schematic go to connector terminals for sensors and actuators.

Color code for schematic lines

Schematic Line description

Red 12 Volts (VBAT)

Purple Injectors (48 Volts) Blue VREF (5 Volts)Green Signal circuitBrown Data Communication LinkBlack Ground circuit

82

71

11

126

108

123

94

75

X3-1X3-19X3-20X3-22

X3-23X4-15X4-17X3-11X3-14

X4-6X3-21

X3-10X3-12X3-13X3-15X3-17

X3-9X3-5

X3-6X4-2X4-1X3-8X3-3

X3-24X4-18X4-24

X3-7

X4-20X4-21

X4-12X4-4

ECMChassis(white)

X-3 X-4

X1-7X2-2X1-6X1-14X2-3

X1-13X1-20

X2-14X1-8X2-1X1-9X1-10

X1-1X1-11

X1-2X2-18X2-24X1-12X1-17X1-21X1-18X2-11

X1-19X1-24X2-6X2-13X2-12X1-15X1-16

X1-23

ECMEngine(gray)

X-1 X-2

X3-5X3-10X3-30X3-31

X3-7X3-27X3-8

X3-24,25X3-1,2,3X3-22,26

X3-28X3-29

X3-4,23

IDMX-3

X-1X-2

WEL

VSS CAL (speedo)

CMP (+)

BAP

BAP

APS / IVS

2 13

ABCDEF

IVSVREFB

APS

Fromrelay B+

12

9

8

TMC Connector

(316)

21 11

22

Fuel heater

Fuel pump

Red

Low side driver controlBlack

High side driver control

High-pressureswitch

Low-pressureswitch

BA

CMPO

1 3 5

2 4 6

Glow Plug CircuitsYellow Red White

CAN 1 SHD

Signal Ground

86 87

85 30

2 5

31

2 5

1 3

85 30

86 87

1 3

2 5

BKP-ODB-LGR-YWW

LB-PKT

BK-W

DB-LGLB-RGY-RBR-WLG-BKDB-LG

R-WLG-R

BR-O

LG-RRO

GYDB

P-OY-R

W-LG

BRBK-PK

P

LG-YDB-O

P-O

BK

GYR-Y

R-LG

BKLB-W

W-R

DB-Y

W-BKR-W

Transmission position switch

32 4

10

PR 2

1

D

0 = Off1 = Acc2 = Run3 = Crank4 = Lock

72 Park interlock

9876

BKPosition Sensor Shield Drain

G-RBR-LGValve Motor + (U Phase)

Valve Motor + (V Phase)Valve Motor + (W Phase) P

8

Ignitiion switch

2 1

ColorCylinder

Cylinder

CKP CMP

Cylinder 1 Cylinder 5Cylinder 3

Cylinder 2 Cylinder 4 Cylinder 6

4

Injector drain wire ground

2143243 1

3312 4 312 4

X1-3X1-17X1-8

X1-1X1-23X1-6X1-24X1-2X1-19X1-5X1-20

X2-2X2-17X2-6X2-18X2-1X2-21X2-5X2-22X2-4X2-19X2-8X2-20

X1-18

243 1

12 4

Open coil groundOpen coil powerClose coil groundClose coil powerOpen coil groundOpen coil powerClose coil groundClose coil powerOpen coil groundOpen coil powerClose coil groundClose coil power

Close coil ground

Open coil groundOpen coil power

Close coil powerOpen coil groundOpen coil powerClose coil groundClose coil powerOpen coil groundOpen coil powerClose coil groundClose coil power

T-YLG-BKLG-RLG-OLG-YO-Y

O-LBLG-W

Y-LB

W-BKW-LBDB

LB-RW-LBO-YW

DB-O

DG-LGO-LG

LB-BK

BK-PKW-PDG-P

T-LG

To avoid serious personal injury, possible death or damageto the engine or vehicle, read all safety instructions in the "Safety Information" section of Engine Diagnostics ManualEGES-305 before doing diagnostic procedures.

R

N

2 1

1 WIF Water In Fuel 0V 7V 0V 7V No/Yes 0V No/Yes 0V B+ 0V = No water, 7V = water in fuel, EST No/Yes 3 VIGN ECM Switch Ignition voltage B+ B+ B+ 0V B+ Switched Ignition power key On = B+, Key Off = 0V5 ECM MPR ECM Main Power Relay Control 0.6V 1V 0.6V 1V 0.6V 1V 0.6V 1V/B+ 0.6V 1V = MPR On / B+ = MPR Off 6 Battery GND Battery Ground 0V 0V 0V 0V ECM Ground 7 Battery GND Battery Ground 0V 0V 0V 0V ECM Ground 8 DDS Driveline Disengagement Switch 0V B+ B+ B+ 0V B+ Key On = 0V in gear / B+ = Park and neutral 9 FPC Fuel Pump control 0V Off B+ On B+ Yes B+ Yes 0V B+ B+ = FPC On, 0V = FPC Off, EST Output State Test 10 A/C Demand Air Conditioner Demand 0V 0V 5V 0V 5V 0V 5V 5V with A/C switch on, freon switches closed. 0V Off11 TACH Tachometer Output Chassis body builder option only12 CAN 1 (+) CAN 1 (Public) 1V 4V 1V 4V 1V 4V 1V 4V Digital signal communication 13 CAN 1 (-) CAN 1 (Public) 1V 4V 1V 4V 1V 4V 1V 4V Digital signal communication 14 RAS Resume Accel Switch 0V Off B+ On 0V B+ 0V B+ 0V B+ Momentary switch 0V at normal state / B+ depressed15 CAN 1 SHD CAN 1 Shield 0V 0V 0V 0V Ground shield for CAN 117 VSS CAL Vehicle Speed Signal Chassis body builder option only19 RPRE Remote Preset (PTO) Chassis body builder option only20 RVAR Remote Variable (PTO) Chassis body builder option only 21 SCS Speed Control Switch 0V Off B+ On 0V Off B+ On 0V Off B+ On Momentary switch 0V at normal state / B+ depressed22 A/C control Air Conditioner Control B+ 0V Off B+ On 0V Off B+ On 0V B+ B+ A/C command Off, 0V A/C command On23 ECI Engine Crank Inhibit 0V / 4V 5V 4 5V 4 5V 0V B+ 0V allows cranking / 4 5V inhibits cranking24 BAP Barometric Pressure Alt. Depend. Alt. Depend Alt. Depend 0V 5V DMM set to V, EST Continuous Monitor session

WARNING: Read safety instructions in Diagnostic Manual EGES-305, before starting diagnostic procedures.

SIGNAL VALUES (All values with breakout box installed on ECM and harness)ELECTRONIC CONTROL SYSTEM DIAGNOSTICSInternational VT 275

X2 ENGINE CONNECTOR (GRAY)

X3 CHASSIS CONNECTOR (WHITE)

X1 ENGINE CONNECTOR (GRAY)

1 EOT Engine Oil Temperature LG-R Temp. depend. Temp. depend. Temp. depend. 0V 5V DMM set to V, EST Continuous Monitor Session2 MAF Mass Air Flow LB-R Performance Specs Performance Specs Performance Specs DMM set to Hz, EST Continuous Monitor Session3 MAP Manifold Air Pressure LG-BK Performance Specs Performance Specs Performance Specs DMM set to V, EST Continuous Monitor Session6 CAN 2 (+) CAN 2 (Private) R-LG 1 4V 1 4V 1 4V 1 4V Digital signal communication 11 IAHD Inlet Air Heater Diagnostic BR 0V Off B+ On 0V B+ Off/On 0V B+ Off/On 0V B+ 0V = IAHC off, B+ = IAHC on Output State Test12 CAN2 SHD CAN 2 Shield BK 0V 0V 0V Ground shield for CAN 213 CAN 2 (-) CAN 2 (Private) LB-W 1 4V 1 4V 1 4V Digital signal communication 14 MAT Manifold Air Temperature R-W Temp. depend. Temp. depend. Temp. depend. 0V 5V DMM set to V, EST Continuous Monitor Session18 BCS Boost Control Solenoid W-R 0V 0V B+ Off/On 0V B+ Off/On 0V B+ 0V = Not enabled, B+ = enabled, EST- Output State Test24 IPR PWR Injection Pressure Regulator Power P-O B+ B+ B+ B+ Switched Ignition power key On = B+, Key Off = 0V

Operating Range

Low Idle High Idle CommentsKey ONPin Item CircuitActual valueSignal

X4 CHASSIS CONNECTOR (WHITE)

1 CKP (+) Crankshaft Position GY 0V 650 700 Hz 700 rpm 3.3 k Hz 3400 rpm 0 Governed speed DMM set to DCV Hz, EST pid Engine speed2 CKP (-) Crankshaft Position DB6 SIGNAL GND Signal ground GY-R 0V 0V 0V 0V Ground for engine sensors7 IAT Inlet Air Temperature DB-LG Temp. depend. Temp. depend. Temp. depend. 0V 5V DMM set to V, EST Continuous Monitor Session 8 ECT Engine Coolant Temperature LG-R Temp. depend. Temp. depend. Temp. depend. 0V 5V DMM set to V, EST Continuous Monitor Session9 CMP (+) Camshaft Position R 0V 700 rpm 700 rpm 3400 rpm 3400 rpm 0 Governed speed DMM set to DCV rpm , EST pid Engine speed 10 CMP (-) Camshaft Position O11 CMP/CKP SHD Cam/Crank Shield BK 0V 0V 0V Ground shield for CMP/CKP sensors 12 IPR Injection Pressure Regulator Y-R 0V B+ Duty cycle, duty controlled; low side driver 13 EOP Engine Oil Pressure BR-O 5V at 0 psi 0V 40 psi 0V 40 PSI 0V 5V Switch Off = 5V = 0 psi / ON = 0V = 40 psi14 VREF A Voltage Reference A (Engine) BR-W 5V 0.5V 5V 5V 5V 0.5 VREF for engine sensors 15 BOO Brake On/Off GY 0V Off B+ On 0V 0V 0V B+ 0V at normal state, B+ depressed16 BPS Brake Pressure Switch R-Y B+ Off 0V On B+ B+ 0V B+ B+ at normal state, 0V depressed17 GPC Glow Plug control P-O 0V Off B+ On 0V B+ Off/On 0V B+ Off/On 0V B+ 0V = GPC off, B+ = GPC on, EST Output State Test18 IAHC Inlet Air Heater Control P 0V Off B+ On 0V B+ Off/On 0V B+ Off/On 0V B+ 0V = IAHC off, B+ = IAHC on, EST Output State Test 19 CKPO Crankshaft Position Out LG-Y 0 Hz 650 700 Hz 700 rpm 3.3 k Hz 3400 rpm 0 Governed speed DMM set to DCV - Hz 20 ICP Injection Control Pressure DB-LG 0.25V Performance Specs Performance Specs 0 4061 psi 1V = 625 psi, EST No Start session21 GPD Glow Plug Diagnostics W-LG 0V Off B+ On 0V B+ Off/On 0V B+ Off/On 0V B+ 0V = GPC off, B+ = GPC on, EST Output State Test 23 OWL Oil Warning Lamp BK-PK 0V B+ Chassis body builder option only24 CMPO Camshaft Position Out DB-O 0 rpm 700 rpm 700 rpm 3400 rpm 3400 rpm 0 Governed speed DMM set to DCV rpm

1 ECM PWR ECM Power B+ B+ B+ 0V 5V ECM B+ from ECM relay2 ECM PWR ECM Power B+ B+ B+ 0V 5V ECM B+ from ECM relay4 VREF B Voltage Reference B (Chassis) 5V 0.5 5V 0.5 5V 0.5 5V 0.5V 5V voltage reference for chassis sensors 6 COO Cruise ON / OFF Switch 0V Off B+ On 0V B+ Off/On 0V-B+ Off/On 0V Off B+ ON Cruise control On/Off switch12 IVS Idle Validation Switch 0V Off 0V B+ 0V B+ 0V at normal state, B+ pedal depressed 15 FPM Fuel Pump Monitor 0V Off B+ On B+ Yes B+ Yes 0V B+ B+ = FPC On, 0V = FPC Off, EST Output State Test17 WEL Warn Engine Lamp Chassis body builder option only18 APS Accelerator Position Sensor 0.7V 4.2V 0.7V 0% 4.2V 102% 0V 5V 0.7V = 10% / 4.2V = 102% 20 ATA (+) Communication Link 0.1V 1.2V 0.1V 1.2V 0.1V 1.2V 0V 5V Diagnostic / Programming21 ATA (-) Communication Link 0.0V 4.2V 0.0V 4.2V 0V 4.2V 0V 5V Diagnostic / Programming24 Signal GND Signal Ground 0V 0V 0V 0V Ground for chassis sensors

Signal Data List Actual value Signal Data List Actual value

R

R

CircuitColor

2 2

22

2

2