Step Lamp Circuit
STEP LAMP CIRCUIT
Description
Controls the step lamp control circuit (ground side) to turn the step lamp ON and OFF.
Component Function Check
CAUTION:
Before performing the diagnosis, check that the following is normal.
- Battery saver output/power supply
- Step lamp bulbs
1. CHECK STEP LAMP OPERATION
CONSULT
1.Turn ignition switch ON.
2.Select STEP LAMP of BCM (INT LAMP) active test item.
3.While operating the test item, check that step lamps turn ON/OFF.
ON: Step lamp ON
OFF: Step lamp OFF
Is the inspection result normal?
YES- Step lamp circuit is normal.
NO- Refer to "Diagnosis Procedure" .
Diagnosis Procedure
Regarding Wiring Diagram information, refer to "Wiring Diagram" Interior Room Lamp.
1. CHECK STEP LAMP OUTPUT
CONSULT
1.Turn ignition switch ON.
2.Select STEP LAMP TEST of BCM (INT LAMP) active test item.
3.While operating the test item, check voltage between BCM connector M17 terminal 21 and ground.
Is the inspection result normal?
YES- Step lamp circuit is operating normally.
Fixed ON-GO TO 3.
Fixed OFF-GO TO 2.
2. CHECK STEP LAMP OPEN CIRCUIT
1.Turn ignition switch OFF.
2.Disconnect BCM connector M17 and step lamp LH and RH connectors.
3.Check continuity between BCM connector M17 terminal 21 and step lamp connector terminal 2.
Is the inspection result normal?
YES- Check the step lamps for an open. If OK, replace BCM. Refer to "Removal and Installation" Service and Repair. If NG, replace the step lamp. Refer to "Bulb or Lens Replacement" Step Lamp.
NO- Repair or replace harness or connectors.
3. CHECK STEP LAMP SHORT CIRCUIT
1.Turn ignition switch OFF.
2.Disconnect BCM connector M17 and step lamp LH and RH connectors.
3.Check continuity between BCM connector M17 terminal 21 and ground.
Is the inspection result normal?
YES- Check the step lamps for a short circuit. If OK, replace BCM. Refer to "Removal and Installation" Service and Repair. If NG, replace the interior room lamp. Refer to "Bulb or Lens Replacement" Step Lamp.
NO- Repair or replace harness or connectors.