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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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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*
Power WindowECU (Passenger)
x3*
Power WindowECU (Passenger)
x3*
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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]
IntelligentTester Display
ContentsSetting
(Default /Available)
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
Customized Body Electrical Function [3/4]
System[Control
ECU]
IntelligentTester Display
ContentsSetting
(Default /Available)
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
Customized Body Electrical Function [4/4]
System[Control
ECU]
IntelligentTester Display
ContentsSetting
(Default /Available)
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
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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
B d El t i lM d l O tli E i Ch i B df T h i i
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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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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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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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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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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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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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TOYOTA Parking Assist-sensor System
System Diagram
ClearanceWarning ECU
Clearance Warning Buzzer
Telltale Light Assembly
Buzzer SoundAdjusting
Knob
CombinationMeter
Vehicle Speed
Shift Position
UltrasonicSensor (RL)
UltrasonicSensor (RR)
UltrasonicSensor (RCL)
UltrasonicSensor (RCR)
UltrasonicSensor (FR)
UltrasonicSensor (FL)
LIN
Neutral StartSwitch
LIN
Clearance Warning Indicator
Clearance Sonar Main Switch
Dimmer SignalTaillight Relay
-G
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TOYOTA Parking Assist-sensor System
Layout of main components
Clearance Warning ECU
Clearance
WarningBuzzer
UltrasonicSensor (RL)
UltrasonicSensor (RR)
UltrasonicSensor (RCL)
UltrasonicSensor (RCR)
Telltale Light Assembly
ClearanceSonar Main
Switch
ClearanceWarningIndicator
Buzzer
SoundAdjusting
Knob
UltrasonicSensor (FL)
UltrasonicSensor (FR)
-G
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TOYOTA Parking Assist-sensor System
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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TOYOTA Parking Assist-sensor System
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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TOYOTA Parking Assist-sensor System
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
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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
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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
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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
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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
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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
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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
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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
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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
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Door Lock Control System
8/22/2019 COROLLA (Body Electrical)
51/51
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