WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
First perform the communication function inspections in HOW TO PROCEED WITH TROUBLESHOOTING to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
PERFORM ACTIVE TEST USING GTS (TURN SIGNAL LIGHT)
Using the GTS, perform the Active Test Click here.
Tester Display | Test Part | Control Range |
---|---|---|
Turn Light RH Relay Operation | Turn signal light operation | OFF - ON |
Turn Light LH Relay Operation | Turn signal light operation | OFF - ON |
OK |
---|
Turn signal light condition is switched by Active Test. |
NG |
CONFIRM LIGHT POSITION Click here |
OK |
READ VALUE USING GTS (HEADLIGHT DIMMER SWITCH)
Using the GTS, read the Data List Click here.
Tester Display | Measurement Item/Display | Normal Condition | Diagnostic Note |
---|---|---|---|
Turn Right Switch | Headlight dimmer switch signal (Turn R position)/ON or OFF | ON: Turn signal switch Turn R position OFF: Turn signal switch OFF |
- |
Turn Left Switch | Headlight dimmer switch signal (Turn L position)/ON or OFF | ON: Turn signal switch Turn L position OFF: Turn signal switch OFF |
- |
OK |
---|
Condition sign can be displayed. |
NG |
INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY Click here |
OK |
CHECK WINDSHIELD WIPER SWITCH ASSEMBLY
Temporarily replace the windshield wiper switch with a new or normally functioning one Click here.
Check the turn signal light operation.
OK |
---|
Turn signal light operation is normal. |
OK |
END (WINDSHIELD WIPER SWITCH WAS DEFECTIVE) |
NG |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
Remove the headlight dimmer switch Click here.
Inspect the headlight dimmer switch Click here.
OK |
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here |
NG |
REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Click here |
CONFIRM LIGHT POSITION
Check the malfunctioning turn signal light.
Result | Proceed to |
---|---|
All lights do not illuminate | A |
Lights on one side do not illuminate | B |
B |
CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER) Click here |
A |
CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - BATTERY AND BODY GROUND)
*1 | Front view of wire harness connector: (to Turn Signal Flasher) |
Disconnect the L125 turn signal flasher connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - TURN SIGNAL FLASHER)
*1 | Front view of wire harness connector: (to Main Body ECU) |
*2 | TRNL |
*3 | TRNR |
*4 | Front view of wire harness connector: (to Turn Signal Flasher) |
Disconnect the DA main body ECU connector.
Disconnect the L125 turn signal flasher connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK TURN SIGNAL FLASHER
Temporarily replace the turn signal flasher with a new or normally functioning one Click here.
Check the turn signal light operation.
OK |
---|
Turn signal light operation is normal. |
OK |
END (TURN SIGNAL FLASHER WAS DEFECTIVE) |
NG |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER)
*1: for LH
*2: for RH
Disconnect the L125 turn signal flasher connector.
Disconnect the B1*1 or B11*2 headlight connector.
Disconnect the S51*1 or S52*2 rear combination light connector.
Disconnect the z10*1 or z9*2 outer rear view mirror connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
for LH | |||||||||
|
|||||||||
for RH | |||||||||
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - TURN SIGNAL FLASHER)
*1 | Front view of wire harness connector: (to Main Body ECU) |
*2 | TRNL |
*3 | TRNR |
*4 | Front view of wire harness connector: (to Turn Signal Flasher) |
Disconnect the DA main body ECU connector.
Disconnect the L125 turn signal flasher connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK TURN SIGNAL FLASHER
Temporarily replace the turn signal flasher with a new or normally functioning one Click here.
Check the turn signal light operation.
OK |
---|
Turn signal light operation is normal. |
OK |
END (TURN SIGNAL FLASHER WAS DEFECTIVE) |
NG |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |