Turn Signals: Testing and Inspection

LIGHTING: LIGHTING SYSTEM: Turn Signal Light does not Illuminate

Turn Signal Light does not Illuminate

WIRING DIAGRAM

INSPECTION PROCEDURE
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.

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
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)
4. CONFIRM LIGHT POSITION
(a) Check the malfunctioning turn signal light.

Result

E -- CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)
D -- CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)
C -- CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER AND BODY GROUND)
B -- READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)
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 -- REPLACE TURN SIGNAL FLASHER ASSEMBLY
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
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)
10. CHECK HARNESS AND CONNECTOR (HEADLIGHT - TURN SIGNAL FLASHER AND BODY GROUND)

(a) Disconnect the L1 flasher connector.
(b) Disconnect the B3 and B13 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 HEADLIGHT ASSEMBLY
11. CHECK HARNESS AND CONNECTOR (SIDE TURN SIGNAL LIGHT - TURN SIGNAL FLASHER AND BODY GROUND)

(a) Disconnect the L1 flasher connector.
(b) Disconnect the A31 and A48 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 SIDE TURN SIGNAL LIGHT ASSEMBLY
12. 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