Turn Signal Light Does Not Illuminate

LIGHTING: LIGHTING SYSTEM: Turn Signal Light does not Illuminate
- Turn Signal Light does not Illuminate

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
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.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (TURN SIGNAL LIGHT)

(a) Using the Techstream, perform the Active Test.

Main Body

OK:

Turn signal light condition is switched by Active Test.

NG -- CONFIRM LIGHT POSITION
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)

(a) Using the Techstream, read the Data List.

Combination Switch

OK:

Condition sign can be displayed.

NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK WINDSHIELD WIPER SWITCH (OPERATION)

(a) Temporarily replace the windshield wiper switch with a new or normally functioning one Removal.

(b) Check the turn signal light operation.

OK:

Turn signal light operation is normal.

NG -- REPLACE MAIN BODY ECU

OK -- END (REPLACE WINDSHIELD WIPER SWITCH) Removal

4. CONFIRM LIGHT POSITION

(a) Check the malfunctioning turn signal light.

Result

B -- READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)

C -- CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER AND BODY GROUND)

D -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - FRONT MULTIPLEX NETWORK DOOR ECU)

E -- CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)
A -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - BATTERY AND BODY GROUND)

(a) Disconnect the L1 flasher connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - TURN SIGNAL FLASHER)

(a) Disconnect the DA ECU connector.

(b) Disconnect the L1 flasher connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. CHECK TURN SIGNAL FLASHER

(a) Measure the voltage according to the value(s) in the table below.

Standard voltage:

NG -- CHECK TURN SIGNAL FLASHER (OPERATION)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (TURN SIGNAL FLASHER - TURN SIGNAL LIGHT)

8. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)

(a) Using the Techstream, read the Data List.

Combination Switch

OK:

Condition sign can be displayed.

NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

9. CHECK WINDSHIELD WIPER SWITCH (OPERATION)

(a) Temporarily replace the windshield wiper switch with a new or normally functioning one Removal.

(b) Check the turn signal light operation.

OK:

Turn signal light operation is normal.

NG -- REPLACE MAIN BODY ECU

OK -- END (REPLACE WINDSHIELD WIPER SWITCH) Removal

10. CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER AND BODY GROUND)

(a) Disconnect the L1 flasher connector.

(b) Disconnect the B1 or B11 light connector.

(c) 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 -- REPLACE HEADLIGHT ASSEMBLY Removal

11. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - FRONT MULTIPLEX NETWORK DOOR ECU)

(a) Disconnect the L1 flasher connector.

(b) Disconnect the N10 or N1 ECU connector.

(c) 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 -- Continue to next step.

12. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY

(a) Remove the outer rear view mirror Removal.

(b) Apply battery voltage to the connector and check the LED illumination condition.

OK:

for LH
for RH

NG -- INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY

OK -- REPLACE FRONT MULTIPLEX NETWORK DOOR ECU Disassembly

13. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY

(a) Remove the side turn signal light Removal.

(b) Apply battery voltage to the connector and check the LED illumination condition.

OK:

NG -- REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY Removal

OK -- REPLACE OUTER REAR VIEW MIRROR ASSEMBLY Removal

14. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)

(a) Disconnect the L1 flasher connector.

(b) Disconnect the S51 and S52 light connectors.

(c) 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 -- REPLACE REAR COMBINATION LIGHT ASSEMBLY Removal

15. CHECK TURN SIGNAL FLASHER (OPERATION)

(a) Temporarily replace the turn signal flasher with a new or normally functioning one Removal.

(b) Check the turn signal light operation.

OK:

Turn signal light operation is normal.

NG -- REPLACE MAIN BODY ECU

OK -- END (REPLACE TURN SIGNAL FLASHER) Removal