Turn Signal Light Circuit

LIGHTING: LIGHTING SYSTEM: Turn Signal Light Circuit
- Turn Signal Light Circuit

DESCRIPTION

The turn signal flasher relay turns on when it receives signals from the headlight dimmer switch integrated with the turn signal switch, causing the turn signal lights to flash.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION (TURN SIGNAL LIGHT)

(a) When the turn signal light switch is operated, check that the appropriate turn signal light flashes.

Result:





C -- INSPECT BULB (REAR TURN SIGNAL LIGHT BULB)

B -- INSPECT BULB (FRONT TURN SIGNAL LIGHT BULB)
A -- Continue to next step.

2. INSPECT FUSE (IG1, TRN-HAZ)

(a) Remove the IG1 fuse from the main body ECU.

(b) Remove the TRN-HAZ fuse from the No. 2 engine room relay block.

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

Standard resistance:





(d) Reinstall the IG1 and TRN-HAZ fuses.

NG -- REPLACE FUSE
OK -- Continue to next step.

3. INSPECT TURN SIGNAL FLASHER RELAY

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





Standard voltage:





NG -- REPLACE TURN SIGNAL FLASHER RELAY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (FUSE - TURN SIGNAL FLASHER RELAY)

(a) Disconnect the E9 turn signal flasher relay connector.





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

Standard voltage:





(c) Reconnect the turn signal flasher relay connector.

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

5. INSPECT HEADLIGHT DIMMER SWITCH

(a) Remove the headlight dimmer switch.





(b) Inspect the turn signal light switch.

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

Standard resistance:





(d) Reinstall the headlight dimmer switch.

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

6. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER RELAY - HEADLIGHT DIMMER SWITCH)

(a) Disconnect the E20 headlight dimmer switch connector.





(b) Disconnect the E9 turn signal flasher relay connector.

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

Standard resistance:





(d) Reconnect the headlight dimmer switch connector.

(e) Reconnect the turn signal flasher relay connector.

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

7. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER RELAY - BODY GROUND)

(a) Disconnect the E9 turn signal flasher relay connector.





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

Standard resistance:





(c) Reconnect the turn signal flasher relay connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY GROUND)

8. INSPECT BULB (FRONT TURN SIGNAL LIGHT BULB)

(a) Remove the front turn signal light.





(b) Apply battery voltage to the terminals and check that the front turn signal light illuminates.

OK:





(c) Reinstall the front turn signal light.

NG -- REPLACE BULB Disassembly
OK -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER RELAY - FRONT TURN SIGNAL LIGHT)

(a) Disconnect the E9 turn signal flasher relay connector.





(b) Disconnect the A16 and A20 front turn signal light connectors.

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

Standard resistance:





(d) Reconnect the turn signal flasher relay connector.

(e) Reconnect the front turn signal light connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT TURN SIGNAL LIGHT - BODY GROUND)

10. INSPECT BULB (REAR TURN SIGNAL LIGHT BULB)

(a) Remove the rear turn signal light.





(b) Apply battery voltage to the terminals and check that the rear turn signal light illuminates.

OK:





(c) Reinstall the rear turn signal light.

NG -- REPLACE BULB Disassembly
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER RELAY - REAR TURN SIGNAL LIGHT)

(a) Disconnect the E9 turn signal flasher relay connector.





(b) Disconnect the L12 and L15 rear turn signal light connectors.

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

Standard resistance:





(d) Reconnect the turn signal flasher relay connector.

(e) Reconnect the rear turn signal light connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (REAR TURN SIGNAL LIGHT ASSEMBLY - BODY GROUND)