Fog/Driving Lamp: Testing and Inspection

Front Fog Lamp Circuit Check

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 SDT
1 Activate IPDM E/R auto active test. Refer to [Diagnosis System (IPDM E/R): Diagnosis Description] Diagnosis System (IPDM E/R) Diagnosis Description.
2 Check that the front fog lamp is turned ON.
WITH SDT
1 Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2 With operating the test items, Check that the front fog lamp is turned ON.






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 [Front Fog Lamp: Wiring Diagram] Electrical Diagrams.

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
Replace the 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 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.






Is battery voltage present?
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 E123.
3 Check continuity between the IPDM E/R harness connector (A) and the front fog lamp harness connector (B).






Does continuity exist?
YES
Replace IPDM E/R. Refer to [IPDM E/R: Removal and Installation of IPDM E/R] Service and Repair.
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.