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 backward through fuse 45 located in IPDM E/R to daytime light relay 1 and LH high beam lamp to IPDM E/R, through the high beam fuses, through the RH high beam lamp and on to ground. The high beam lamps are wired in series which causes them to illuminate at a reduced intensity.


Diagnosis Procedure

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

1. CHECK DAYTIME LIGHT RELAY 1 FUSE

1.Turn the ignition switch OFF.
2.Check that the following fuse is not open.





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

2. CHECK IPDM E/R OUTPUT SIGNAL

1.Turn the ignition switch OFF.
2.Disconnect the daytime light relay 1 connector.
3.Turn the ignition switch ON.
4.Check the voltage between the daytime light relay 1 harness connector and ground.





Is battery voltage present?
YES- GO TO 3
NO- GO TO 5

3. CHECK DAYTIME LIGHT RELAY 1 CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect IPDM E/R connector E122.
3.Check continuity between the IPDM E/R harness connector and the daytime light relay 1 harness connector.





4.Check continuity between the daytime light relay 1 harness connector and ground.





Is the measurement value normal?
YES- GO TO 4
NO- Repair the harnesses or connectors.

4. CHECK DAYTIME LIGHT RELAY 1

Check daytime light relay 1. .
Is the inspection result normal?
YES- Check headlamp (HI) circuit. If OK, replace IPDM E/R. Service and Repair. If NG, Headlamp (HI) Circuit.
NO- Replace daytime light relay1.

5. CHECK DAYTIME LIGHT RELAY CIRCUIT FOR OPEN

1.Turn the ignition switch OFF.
2.Disconnect IPDM E/R connector E119.
3.Check continuity between the IPDM E/R harness connector and the daytime light relay 1 harness connector.





Does continuity exist?
YES- Replace IPDM E/R. Service and Repair.
NO- Repair the harnesses or connectors.


Component Inspection


1. CHECK DAYTIME LIGHT RELAY 1

1.Turn ignition switch OFF.
2.Remove daytime light relay 1.
3.Check the continuity between daytime light relay 1 terminals under the following conditions.





Is the inspection result normal?
YES- Inspection End.
NO- Replace daytime light relay 1