Turn Signals: Testing and Inspection

TURN SIGNAL LAMP CIRCUIT

Component Function Check


1. CHECK TURN SIGNAL LAMP

CONSULT ACTIVE TEST
1.Select "FLASHER" of BCM (FLASHER) active test item.
2.With operating the test items, check that the turn signal lamps is turned ON.

LH: Turn signal lamps (LH) ON
RH: Turn signal lamps (RH) ON
Off: Turn signal lamps OFF

Is the inspection result normal?
YES- Turn signal lamp circuit is normal.
NO- .


Diagnosis Procedure


1. CHECK TURN SIGNAL LAMP BULB

Check the applicable lamp bulb.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace bulb.

2. CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE

1.Turn ignition switch OFF.
2.Disconnect front turn signal lamp connector, side turn signal lamp connector and rear combination lamp connector.
3.Turn ignition switch ON.
4.With operating the turn signal switch, check voltage between BCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 4.

3. CHECK TURN SIGNAL LAMP OPEN CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM connector.
3.Check continuity between BCM harness connector and front turn signal lamp, side turn signal lamp or rear combination lamp harness connector.
Front turn signal lamp





Side turn signal lamp





Rear turn signal lamp





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace harness.

4. CHECK TURN SIGNAL LAMP SHORT CIRCUIT

Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES- Check each bulb socket for internal short circuit, and if check result is normal, replace BCM. With Intelligent Key System (with Intelligent Key), Service and Repair
(without Intelligent Key).
NO- Repair or replace harness.

5. CHECK TURN SIGNAL LAMP GROUND OPEN CIRCUIT

Check continuity between BCM harness connector and front turn signal lamp, side turn signal lamp or rear combination lamp and ground.
Front turn signal lamp





Side turn signal lamp





Rear turn signal lamp





Is the inspection result normal?
YES- Check corresponding bulb socket and harness. Repair or replace if necessary.
NO- Repair or replace harness.