corolla (body electrical)

8/22/2019 COROLLA (Body Electrical)

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Body ElectricalModel Outline Engine Chassis Bodyfor Technician

1

Contents

Click a Section Tab


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MPX SystemEngine Room Relay BlockLightingCombination Meter

Wiper and WasherAir ConditioningTOYOTA Parking Assist-sensor SystemPower Window SystemDoor Lock Control System


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3

CAN and LIN Communication

MPX System

Meter ECU

Power SteeringECU

ECM

Skid ControlECU

Center AirbagSensor Assembly

DLC3JunctionConnector

TerminatingRegister

(120 ohm)

Optional ECUs are also included

: Main Wire (Hi): Main Wire (Lo)

CAN V Bus (500 kbps)

: Branch Wire (Hi): Branch Wire (Lo)

: LIN (20 kbps): Master ECU

for LIN

Ultrasonic

Sensor (FL)

UltrasonicSensor (RR)

UltrasonicSensor (RCR)

UltrasonicSensor (RCL)

Ultrasonic

Sensor (RL)

UltrasonicSensor (FR)

ClearanceWarning ECU

*: Only for Models with All doors One-touchAuto Up-and-down Function

A/C ControlAssembly(Auto A/C)

-G -J

Main Body ECU A/C Amplifier

Power WindowECU (Driver)

Power WindowMaster Switch*

Power WindowECU (Passenger)

x3*


x3*


x3*


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4

MPX System

Communication Wire and Drive Type Specification of communication wire

Item CAN LIN

WireHarness

Twisted-pair Wire AV Single Wire

Drive

Type Differential Voltage Drive Single Wire Voltage Drive

Feature

This communication line is a pair oftwisted wires.Communication occurs by applying Hior positive (+) and Lo or negative (-)voltages to the two lines in order tosend a signal.

This communication wire is thin andlightweight compared with theTwisted-pair Wire.Voltage is applied to this line in orderto drive the communication.

ECU ECUECU ECU

Hi Hi

Lo Lo

-G -J


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Reference(MPX System)

Difference Voltage Drive Differential voltage generated between two wires is

detected as a data signal, and has the feature that itcannot be easily influenced by the noise from outside.

Differential Voltage Drive

3.5 V

2.5 V

1.5 V

Single Wire Voltage Drive

4.0 V0 V

1 0 1 0 1 00 1Data Data

Noise

CancelEachOther

1 0

1 0

Noise

0 ?

1 0Abnormality

-G -J


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MPX System

Customized Body Electrical Function [1/4] Intelligent tester can change the system settings

System[Control

ECU]

IntelligentTester Display

ContentsSetting

(Default /Available)

Wireless DoorLock Control

System

[Main BodyECU]

Wireless Control Wireless door lock function ON/ OFF

Auto Lock TimeInterval between unlocking andautomatic relocking

30 sec/ 60 sec /120 sec

Hazard AnswerBack

Answer back function of turn signallights

ON / OFF

IlluminatedEntry

[Main BodyECU]

Lighting Time Lighting time after closing the door7.5 sec / 15 sec/

30 sec

I/L When ACCOFF

Illuminate when the ignition switchturned ACC to OFF

ON / OFF

I/L ON W/DoorKey Unlock

Illuminate when a door is unlocked ON / OFF

-G -J


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MPX System

Customized Body Electrical Function [2/4]

System[Control

ECU]


ContentsSetting


PowerWindow

System*1

[Main BodyECU]

Door Key LinkedP/W Up

Key-linked up function ON / OFF

Door Key LinkedP/W Down

Key-linked down function ON / OFF

P/W Upw/Transmitter

Transmitter-linked up function ON / OFF

P/W Downw/Transmitter

Transmitter-linked down function ON / OFF

Door LockControlSystem*1

[Main BodyECU]

Auto Lock /Shift*2

Shift-linked automatic door lockfunction

ON / OFF

Auto Unlock /Shift*2

Shift-linked automatic door unlockfunction

ON / OFF

All Unlock /Open-Close

Drivers door opening-linkedautomatic door unlock function

ON / OFF

Auto LockSpeed-sensitive automatic door lockfunction

ON / OFF

-G

*1: Only for SE-G grade model, and XEi grade model except low grade package*2: Only for A/T models

B d El ld l l E h B df h


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MPX System


System[Control

ECU]


ContentsSetting


LightControl*

[Main BodyECU]

SensitivitySensitivity of the automatic lightcontrol

LIGHT 2 / LIGHT 1/ NORMAL /

DARK 1 / DARK 2

Response TimeThe delay timing of lighting thetaillight when going into the tunnelin case that the light control switchis at AUTO position

LONG / NORMAL

Air

Conditioning(Auto A/C)

[A/CAmplifier]

Set TemperatureShift

Shifted temperature setting againstthe display temperature

+2 C / +1 C /NORMAL /-1 C / -2 C

Air Inlet ModeAutomatically change the mode torecirculated mode when turning theA/C ON

MANUAL / AUTO

CompressorMode

Automatically turn the A/C ON bypressing the AUTO button when theblower is ON

MANUAL / AUTO

*: Only for models with automatic light control system

-G

B d El i lM d l O li E i Ch i B df T h i i


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MPX System


System[Control

ECU]


ContentsSetting


AirConditioning(Auto A/C)

[A/C

Amplifier]

Compressor / AirInlet DEFOperation

Automatically turn the A/C ONlinking with the front DEF button

NORMAL / LINK

EvaporatorControl

Set the evaporator control to theautomatic position (AUTO) to savepower or to the coldest position(MANUAL) to dehumidify the air andto prevent the windows fogging up

MANUAL / AUTO

FOOT / DEF AutoMode

Automatically turn the air flow toFOOT/DEF ON when auto mode isON

ON / OFF

DEF AutomaticBlow Up Function

Automatically switch the blowerlevel up when the defroster is ON

ON / OFF

AmbientTemperatureShift

Shifted ambient temperature againstthe display ambient temperature

+3 C / +2 C /+1 C / Normal/

-1 C / -2 C /-3 C

-G

B d El t i lM d l O tli E i Ch i B df T h i i


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Engine Room Relay Block

Integration Relay and Integrated Fusible Link

[Integration Relay](Mechanical Relay)

IG2 RelayHORN Relay

EFI MAIN Relay

[Integrated Fusible Link]

HTR FuseABS No.1 FuseRDI FAN FuseH-LP CLN FuseH-LP MAIN Fuse

P/I FuseEPS FuseALT Fuse

Engine RoomRelay Block

-G -J



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Service Point(Engine Room Relay Block)

Integration Relay and Integrated Fusible Link Integration relay and integrated fusible link assembly

are non-disassembly parts (It must be replaced asassembly)

Non-disassembly parts

Relay Block

IntegratedFusible LinkAssembly

IntegrationRelay

Cover

-G -J



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Service Point(Engine Room Relay Block)

Integrated Fusible Link Integrated fusible link can check a meltdown portion

from clear cover portion without removing

Normal Blowout

Replace integratedfusible link assembly

-G -J

B d El ctric lM d l Outlin En in Ch ssis B df r T chnici n


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Lighting

Automatic Headlight Beam Level Control System The system automatically maintains the vertical

movement of the optical axes of the headlights (lowbeam)

-G

Maintains thebeam level

properly



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14

Lighting

Automatic Headlight Beam Level Control System System diagram

HeightControlSensor

Headlight Status

SpeedSignal

-G

HeadlightLeveling ECU

Main BodyECU

Meter ECU

Automatic HeadlightBeam Level Control

System Warning Light

HeadlightLeveling

Actuator RH

HeadlightLeveling

Actuator LHHeadlight Relay

(Low Beam)

DLC3



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Lighting

Automatic Headlight Beam Level Control System Location

-G

HeightControlSensor

Automatic HeadlightBeam Level Control

System Warning Light

HeadlightLeveling ECU



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Service Point(Lighting)

Automatic Headlight Beam Level Control System Initialize the system after the vehicle height changes

due to servicing or ECU replacement

Reinstall parts

Replace new ECU

Suspension

Height ControlSensor

-G

Using SST Check Wire

Using Intelligent Tester

Height SensorInitialization

Initialization



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Service Point(Lighting)

Automatic Headlight Beam Level Control System Initialization Procedure (Using SST Check Wire)

-G

2.Pull the light control switch (flashposition) 3 times within 20 sec.after the SST connection

3.The warning light blinks3 times and then goes OFF(Initialization is completed)

CG

LVL

NOTE: After the ECU replacement, the warning light continuously blinks twice at 2 Hzuntil the initialization is completed

Preconditions

Approx. 10 liters (10.6 US

qts, 8.8 Imp.qts)of fuel

On a levelsurface

Unload the trunkand vehicle

(no passenger)

HeadlightOFF

1.Connect terminal CG and LVL ofDLC3 after IG-ON

After the initialization, adjustthe headlight aim



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Lighting

Headlight Cleaner System This system sprays washer fluid on the headlight

lenses to clean them

-G

HeadlightCleaner Nozzle

HeadlightLens

System OFF In Operation

HeadlightCleanerNozzle



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Lighting

Headlight Cleaner System This system is controlled by the headlight cleaner

control relay

-G

HeadlightCleaner Motor

HeadlightCleanerSwitch

IG

Headlight Status

Main Body ECU

Headlight Relay(Low Beam)

HeadlightCleanerControlRelay

Washer Status

Wiper Switch

Washer Motor

IG +B



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Lighting

Headlight Cleaner System Location

-G

Headlight CleanerSwitch

HeadlightCleanerMotor

Headlight

CleanerControl Relay

WasherMotor

Front

Washer Tank



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Lighting

Headlight Cleaner System 2 operation conditions

-G

Ignition Switch: ONHeadlight Cleaner Switch: ON

Operation by theHeadlight Cleaner Switch

Ignition Switch: ONHeadlight (Low Beam): ONWasher Motor: ON*

Washer Linked Operation

*: Only for the First Time

Operates headlight cleanermotor for approx. 1 sec.



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Reference(Lighting)

Headlight Cleaner System Operation

-G

Ignition Switch

Headlight(Low)

HeadlightCleanerSwitch

WasherMotor

HeadlightCleanerMotor

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Approx. 1 sec.



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Lighting

Automatic Light Control System This system automatically turns the headlights and

taillights ON or OFF according to the ambient light

-G

Automatic LightControl Sensor

AUTOPosition



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Lighting

Automatic Light Control System This system automatically turns the headlights and

taillights ON or OFF according to the ambient light

-G

Ignition Switch

LightControlSwitch

Main BodyECU

Headlights(Low Beam)

Taillights

Headlight Relay(Low Beam)

Taillight Relay

Automatic LightControl Sensor

BrightDark

Hz



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y EM u E g yf

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Combination Meter

Sub-tank Fuel Level Warning Light (1ZZ-FBE Only) Sub-tank fuel level warning light is added for 1ZZ-FBE

model

Fuel Sub-tank

Sub-tank

Fuel SenderGauge

Sub-tank Fuel LevelWarning Light

-G



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Combination Meter

Sub-tank Fuel Level Warning Light (1ZZ-FBE Only) When the resistance of the sender gauge is lower than

the defined value, the warning light is illuminated

Fuel Sub-tank

Combination Meter

Sub-tank Fuel Sender

Gauge (Thermistor)

Meter ECU

NOTE: When the meter ECU detects the open circuit, the sub-tank fuel levelwarning light is illuminated

+B

Voltage

ON

ThermistorResistance

Lower than thedefined value

In The Air

Low Resistance

In The Fuel

High Resistance

ON

-G



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yg y

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Service Point(Combination Meter)

Sub-tank Fuel Level Warning Light (1ZZ-FBE Only) The sub-tank fuel level warning can be disabled

ODO/TRIP

Switch

IgnitionSwitch

LCDDisplay

OFF

ON

OFF

ON

OFF

ON

The warning enable/disenable state is not stored in EEPROM.

After the battery reconnection, the warning is in the enable state.

ODO/TRIPDisplay

ODO/TRIPDisplay

10 sec. 5 sec.

ON: 5 times

-G



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Wiper and Washer

Washer Nozzle The spray type washer nozzle sprays the washer fluid

over a wide area

WasherNozzle

Flow Distribution

FluidVolume

Wide

Main FlowCenter

-G -J



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Service Point(Wiper and Washer)

Washer Nozzle If adjustment is necessary, replace a washer nozzle

NOTE: Washer nozzle cannot be reused after removing

Aim Angle -2 0 +2

IdentificationMark

0

-2

+2

-G -J



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yg y

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Air Conditioning

Overall

Ambient Temp.Sensor*

MF (Multi-Flow) -IVSub-cool Condenser

10-cylinder, SwashPlate Type

Compressor withMagnetic Clutch

(10S15L)

Heater Control Panel

Auto A/C Manual A/C

Solar Sensor*

A/C Amplifier

Room Temp Sensor*

A/C Pressure Switch

*: Auto A/C Only

-G -J



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yg y

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Air Conditioning

Overall

Pulse signal detectiontype servo motor with

bus connector*

RS (Revolutionary Slim)Evaporator

Clean Air Filter(High Efficiency

Type Type ParticleFilter)

SFA-II (StraightFlow Aluminum

Heater)

Blower MotorBlower Controller (Auto A/C)

Blower Resister (Manual A/C)

*: Auto A/C Only

-G -J



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Air Conditioning

Bus Connector Light weight and eliminate number of the harness

MA/C Amplifier

CPU

CommunicationIC

: Communication / Drive IC

ServoMotor

Bus Connector

M

[with Bus Connector Type]

A/C Amplifier

CPU

Servo

Motor

[Conventional Type]

MDrive

IC

MDrive

IC

B BusBus

Bus G

-G



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Reference(Air Conditioning)

Bus Connector Built in Communication / servo motor drive IC

Bus Connector

-G



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Air Conditioning

Servo Motor Detection method of damper position is changed to

pulse signal from potentiometer voltage

Damper Opening AngleOutputVo

ltage

[Pulse Signal (New)]

[Potentiometer Voltage](Conventional)

Damper OpenCloseServo Motor

-G



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Air Conditioning

Servo Motor Continuity through contact points: Lo (0V)

No continuity through contact points : Hi (5V)

GND

5V

M

A

B

[Servo Motor]

Printed-circuitBoard

ConductionPortion

ContactPoints

5V (Hi)

0V (Lo)

[Bus Connector]

-G



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M

Air Conditioning

Servo Motor Detects damper position and movement direction by

the difference of pulse phase

[Servo Motor]

ABGND

A

B

GND

A

B

Printed-circuit BoardContact Points

1 Rotation

ConductionPortion

Hi

Lo

Hi

Lo

-G



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TOYOTA Parking Assist-sensor System

General Informs the driver of the distance between the

sensors and the obstacles by blinking indicator lightand sounding buzzer

-G



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System Diagram

ClearanceWarning ECU

Clearance Warning Buzzer

Telltale Light Assembly

Buzzer SoundAdjusting

Knob

CombinationMeter

Vehicle Speed

Shift Position

UltrasonicSensor (RL)





UltrasonicSensor (FL)

LIN

Neutral StartSwitch

LIN

Clearance Warning Indicator

Clearance Sonar Main Switch

Dimmer SignalTaillight Relay

-G



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Layout of main components

Clearance Warning ECU

Clearance

WarningBuzzer

UltrasonicSensor (RL)




Telltale Light Assembly

ClearanceSonar Main

Switch

ClearanceWarningIndicator

Buzzer

SoundAdjusting

Knob

UltrasonicSensor (FL)


-G



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Operating Conditions

MainSwitch

Shift Position Vehicle SpeedUltrasonic Sensor

Front CornerRear Cornerand Center

OFF

ON

P

R

Except P, RLow Speed

High Speed

: Detect : Prohibit

- Vehicle Speed -

Low Speed

High Speed

8 km/h

15 km/h

-G



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Detection Operation Indicator light

- Detection Range -

Distance to Obstacle [mm] DetectionLevel

Indicator ON / OFF[msec.]Corner Rear Center

250 or less 350 to less 4th Continuous

375 to 250 450 to 350 3rd 75 / 75

500 to 375 600 to 450 2nd 150 / 150

- 1500 to 600 1st 150 / 650

: Detection Range of Corner Sensor : Detection Range of Rear Center Sensor

A A

AA

-G

A Cross Section



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Detection Operation Buzzer beeping pattern

Detection Area Front Corner

HighestDetection

Level4th 3rd 2nd

NonDetection

RearCorneror

Re

arCenter

4th Pattern B Pattern A Pattern A Continuous

3rd Pattern A 75 / 75 75 / 75 75 / 752nd Pattern A 75 / 75 150 / 150 150 / 150

1st Pattern A 75 / 75 150 / 150 150 / 650

Non Detection Continuous 75 / 75 150 / 150 No Beep

Buzzer ON / OFF (msec.)

Pattern A

Pattern B

ON

OFF

ON

OFF

50

50

850

250

(msec.)50

50

OFF: 7 Times

OFF: 3 Times

-G


S


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Initial Check for Indicator and Buzzer After the system is activated, it illuminates the indicator

and sounds the buzzer for approx. 1 second, whilechecking for any malfunction in the ultrasonic sensors

Service Point(TOYOTA Parking Assist-sensor System)

PowerIndicator

SonarIndicator

(msec.)

Buzzer

1 cycle250

250 750

250

5 cycles

PowerIndicator

SonarIndicator

(msec.)

Buzzer

1 cycle250

250 750

250

5 cycles

-G

Sensor Malfunction Indication

Sensor Frozen Indication


P Wi d S t


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Power Window System

Overall 2 types of system

Driver Door One-touch Auto

Up-and-down Function

All Doors One-touch Auto

Up-and-down Function

-G -J


P Wi d S t


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Power Window

Master Switch

LIN

Each PowerWindow Switch

M

M

Driver PowerWindow Regulator

Motor Assembly

HallIC

PowerWindow

ECU

EEPROM

+B

Power Window System

System Diagram For models with driver door one-touch auto up-and-

down function

Power WindowMain Relay Each Power Window

Regulator Motor Assembly

-G -J

Main BodyECU


P Wi d S t


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Power Window System

System Diagram For models with all doors one-touch auto up-and-

down function

LIN

M

HallIC

PowerWindow

ECU

EEPROMM

Driver PowerWindow Regulator

Motor Assembly

HallIC

PowerWindow

ECU

EEPROM

+B

Main BodyECU

Each Power WindowRegulator Motor Assembly

Each PowerWindow Switch

-G

Power Window

Master Switch


P Wi d S t


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LOCK switch Close

UNLOCK switch Open

Power Window System

Function

-G

Key-linked Up-and-

Down Function

Transmitter-linked Up-and-

Down Function

LOCK side Close

UNLOCK side Open


P Wi d S t


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Power Window System

Power Window Regulator Motor Assembly Power Window ECU is built into the motor assembly

Window glass position is memorized in EEPROM

Power Window ECU(with EEPROM)

Hall IC

Power Window Regulator Motor Assembly

Motor

Magnet

-G -J


S i P i t ( S )


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Service Point(Power Window System)

Initialization of Power Window ECU Perform the initialization of power window position in

the following cases:Servicing

Power WindowSwitch Indicator

Procedure

Relation parts are reinstalled Power window regulatormotor assembly

Power window regulatorassembly, etc.

Illuminates

1. Disconnect the powerwindow regulator motor

connector while the powerwindow motor is operating2. Full close the door glass,

and hold the powerwindow master switch inAUTO UP position for 1sec. or more

Power window regulatormotor assembly is replaced

Blinks

Full close the door glass, andhold the power windowmaster switch in AUTO UPposition for 1 sec. or more

Initialization is not necessary when the battery terminal is reconnected

-G -J


Ser ice Point (P Wi d S t )


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Service Point(Power Window System)

Diagnosis System Diagnosis indication at malfunction

Power Window Switch Indicator Light Condition (Malfunction) Priority

Pattern 1

(when IG turned ON)

Window position is notmemorized in EEPROM

Window position(EEPROM) malfunction

Hall IC malfunction

2

Pattern 2

(after Window Switch is operated)

Lost communication withMain Body ECU

1

ON

OFF

0.5 sec.1.5 sec.

0.5 sec.

Continues

ON

OFF

0.5 sec.

1.5 sec.

Approx. 10 sec.

-G -J


Door Lock Control System


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Door Lock Control System

Function

-G

Speed-sensitive

Automatic Door Lock

Shift-linked Automatic

Door Lock (A/T Only)

Shift-linked AutomaticDoor Unlock (A/T Only)

Drivers Door Opening-linked Automatic Door

Unlock

All DoorLocked

All Door

Unlocked

Approx.20 km/h

Km/h

corolla (body electrical)

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