Daytime Light System Inoperative

Daytime Light System Inoperative

Description

The daytime light system is inoperative even though the combination switch (lighting and turn signal switch) and parking brake switch are in the normal setting, also whenever engine is operating.

Diagnosis Procedure

NOTE:

Before performing the diagnosis, check that the following is normal.

- High beam lamp function
- Parking brake warning lamp
- Engine operation status

1. COMBINATION SWITCH (LIGHTING AND TURN SIGNAL SWITCH) INSPECTION

Check the combination switch (lighting and turn signal switch). Refer to [Combination Switch System Symptoms: Symptom Table] Symptom Related Diagnostic Procedures.

Is the combination switch (lighting and turn signal switch) normal?
YES
GO TO 2.
NO
Repair or replace the malfunctioning part.

2. CHECK DAYTIME LIGHT REQUEST SIGNAL INPUT

WITH SDT data list
1 Parking brake switch is released.
2 Start engine.
3 Select "DTRL REQ" of IPDM E/R data list item.
4 While operating the combination switch (lighting and turn signal switch), check the monitor status.






Is the item status normal?
YES
GO TO 3.
NO
Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.

3. DAYTIME LIGHT RELAY CIRCUIT INSPECTION

Check the daytime light relay circuit. Refer to [Daytime Light Relay Circuit Check] Testing and Inspection.

Is the daytime light relay circuit normal?
YES
Replace IPDM E/R. Refer to [IPDM E/R: Removal and Installation of IPDM E/R] Service and Repair.
NO
Repair or replace the malfunctioning part.