Front Fog Lamp Circuit

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.


Component Function Check


1. CHECK FRONT FOG LAMP OPERATION

WITHOUT CONSULT
1.Activate IPDM E/R auto active test. Refer to "Diagnosis Description" Diagnosis Description.
2.Check that the front fog lamp is turned ON.
WITH CONSULT
1.Select EXTERNAL LAMPS of IPDM E/R active test item.
2.While operating the test items, Check that the front fog lamp is turned ON.
Fog: Front fog lamp ON


Off: Front fog lamp OFF
Is the front fog lamp turned ON?
YES- Front fog lamp circuit is normal.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Electrical Diagrams.

1. CHECK FRONT FOG LAMP FUSE

1.Turn the ignition switch OFF.
2.Check if the following fuse is blown.





Is the fuse open?
YES- Replace the blow fuse after repairing the affected circuit.
NO- GO TO 2

2. CHECK FRONT FOG LAMP OUTPUT VOLTAGE

1.Turn the ignition switch OFF.
2.Disconnect the front fog lamp harness connector E305 or E306.
3.Turn the ignition switch ON.
4.Turn the front fog lamps ON.
5.Check the voltage between the fog lamp harness connector E305 or E306 terminal 1 and ground.





Is battery voltage present?
YES- GO TO 4
NO- GO TO 3
Revision: March 20122013 Infiniti JX

3. CHECK FRONT FOG LAMP OPEN CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect IPDM E/R harness connector E217.
3.Check continuity between the IPDM E/R harness connector E217 and the front fog lamp harness connector E305 or E306.





Does continuity exist?
YES- Replace IPDM E/R. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace 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 E305 or E306 terminal 2 and ground.





Does continuity exist?
YES- Inspect the fog lamp bulb.
NO- Repair or replace the harnesses or connectors.
Revision: March 20122013 Infiniti JX