Diagnosis Procedure

FRONT FOG LAMP CIRCUIT


Description

The IPDM E/R (intelligent power distribution module engine room) controls the front fog lamp relay based on inputs from the BCM via the CAN communication lines. When the front fog lamp relay is energized, power flows from the front fog lamp relay in the IPDM E/R to the front fog lamps.





FRONT FOG LAMP CIRCUIT


Diagnosis Procedure

1.CHECK FRONT FOG LAMP FUSE
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.





Is the fuse open?
YES - Repair the harness and replace the fuse.
NO - GO TO 2.
2.CHECK FRONT FOG LAMP OUTPUT VOLTAGE





1. Turn the ignition switch OFF.
2. Disconnect the front fog lamp connector.
3. Turn the ignition switch ON.
4. Turn the front fog lamps ON.
5. Check the voltage between the fog lamp connector and ground.





Are the voltage readings as specified?
YES - GO TO 4.
NO - GO TO 3.
3.CHECK FRONT FOG LAMP OPEN CIRCUIT





1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the front fog lamp harness connector.





Does continuity exist?
YES - GO TO 4.
NO - Repair the harnesses or connectors.
4.CHECK FRONT FOG LAMP GROUND CIRCUIT





1. Disconnect the front fog lamp connector.
2. Check continuity between the front fog lamp harness connector terminal and ground.





Does continuity exist?
YES - Inspect the fog lamp bulb.
NO - Repair the harness.