Daytime Light Relay Circuit

DAYTIME LIGHT RELAY CIRCUIT

Description

The BCM sends a daytime light request to the IPDM E/R via the CAN communication lines. The power flows through fuse 43 located in IPDM E/R to the daytime light relay coil. When the IPDM E/R operates the daytime light relay, power is sent to the daytime lamps.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Daytime Running Lamp.

1. CHECK DAYTIME LIGHT RELAY VOLTAGE SUPPLY

1.Turn the ignition switch OFF.
2.Remove the daytime light relay.
3.Check the voltage between the daytime light relay harness connector E228 and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK DAYTIME LIGHT RELAY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect IPDM E/R harness connector E18.
3.Check continuity between the IPDM E/R harness connector E18 and the daytime light relay harness connector E228.





4.Check continuity between the IPDM E/R harness connector E18 and ground.





Is the inspection result normal?
YES- Replace IPDM E/R. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace the harness or connector.

3. CHECK DAYTIME LIGHT RELAY CONTROL CIRCUIT

1.Turn the ignition switch OFF.
2.Check continuity between the IPDM E/R harness connector E201 and the daytime light relay harness connector E228.





3.Check continuity between the daytime light relay harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace the harness or connector.

4. CHECK DAYTIME LIGHT RELAY

Check the daytime light relay. Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 5.
NO- Replace relay.

5. CHECK DAYTIME LIGHT CIRCUIT (OPEN OR SHORT TO GROUND)

1.Turn the ignition switch OFF.
2.Check continuity between the daytime light relay harness connector E228 and the front fog lamp harness connector.





3.Check continuity between the daytime light relay harness connector E228 and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace the harness or connector.

6. CHECK DAYTIME LIGHT GROUND CIRCUIT FOR OPEN

1.Turn the ignition switch OFF.
2.Disconnect front fog lamp connector E234 or E237 in question.
3.Check continuity between the front fog lamp connector E234 or E237 and ground.





Is the inspection result normal?
YES- Inspect daytime light bulb.
NO- Repair or replace the harness or connector.


Component Inspection


1. CHECK DAYTIME LIGHT RELAY

1.Turn ignition switch OFF.
2.Remove daytime light relay.
3.Check the continuity between daytime light relay terminals 3 and 5 when voltage is supplied between terminals 1 and 2.





Is the inspection result normal?
YES- Inspection End.
NO- Replace daytime light relay.