Step Lamp Circuit

STEP LAMP CIRCUIT

Description

Controls the step lamp (ground side) to turn the step lamp ON and OFF.


Component Function Check


CAUTION:
Check step lamp bulbs first.

1. CHECK STEP LAMP OPERATION

CONSULT ACTIVE TEST
1.Turn ignition switch ON.
2.Select "STEP LAMP TEST" of BCM (INT LAMP) active test item.
3.While operating the test items, check the step lamp operation.





Are the step lamps turned ON/OFF?
YES- Step lamp circuit is normal.
NO- .


Diagnosis Procedure


1. CHECK STEP LAMP OUTPUT

CONSULT ACTIVE TEST
1.Turn ignition switch ON.
2.Select "STEP LAMP TEST" of BCM (INT LAMP) active test item.
3.While operating the test item, check continuity between BCM harness connector and ground.





Is the measurement value normal?
Fixed at 12 V-Replace BCM.
Fixed at 0 V-GO TO 2.

2. CHECK THE SYMPTOM

Check that the lamp fixed to ON or OFF.
Fixed OFF-GO TO 3.
Fixed ON-GO TO 5.

3. CHECK STEP LAMP POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect the step lamp connector.
3.Turn ignition switch ON.
4.Check voltage between the step lamp harness connector and ground.





Is the measurement value normal?
YES- GO TO 4.
NO- Check the interior room lamp power supply. Interior Room Lamp Power Supply Circuit.

4. CHECK STEP LAMP OPEN CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM connector.
3.Check continuity between BCM harness connector and step lamp harness connector.





Does continuity exist?
YES- Replace the step lamp.
NO- Repair the harnesses or connectors.

5. CHECK STEP LAMP SHORT CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM and step lamp connectors.
3.Check continuity between BCM harness connector and ground.





Does continuity exist?
YES- Repair the harnesses or connectors.
NO- Replace BCM.