Headlamp (HI) Circuit

HEADLAMP (HI) CIRCUIT





Component Function Check
1.CHECK HEADLAMP (HI) OPERATION
IPDM E/R AUTO ACTIVE TEST
1. Start IPDM E/R auto active test. Diagnosis Description.
2. Check that the headlamp switches to the high beam.
CONSULT-III ACTIVE TEST
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With operating the test items, check that the headlamp (HI) is turned ON.






NOTE:
ON/OFF is repeated 1 second each.
Is the headlamp (HI) turned ON?
YES - Headlamp (HI) circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK HEADLAMP (HI) OUTPUT VOLTAGE
CONSULT-III ACTIVE TEST
1. Turn the ignition switch OFF.
2. Disconnect the headlamp connector.
3. Turn the ignition switch ON.
4. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
5. With operating the test items, check the voltage between the IPDM E/R harness connector and the ground.






Is the measurement value normal?
YES - GO TO 2.
NO - GO TO 3.
2.CHECK HEADLAMP (HI) OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the headlamp harness connector.






Does continuity exist?
YES (Without daytime running light system)-GO TO 5.
YES (With daytime running light system)-GO TO 6.
NO - Repair the harnesses or connectors.
3.CHECK HEADLAMP (HI) FUSE
1. Turn the ignition switch OFF.
2. Check that the following fuses are not fusing.






Is the fuse fusing?
YES - GO TO 4.
NO - Replace IPDM E/R.
4.CHECK HEADLAMP HIGH (HI) SHORT CIRCUIT
1. Disconnect the IPDM E/R connector.
2. Check continuity between the IPDM E/R harness connector terminal and the ground.






Does continuity exist?
YES - Repair the harnesses or connectors. And then replace the fuse.
NO - Replace the fuse. (Replace IPDM E/R if the fuse is fusing again.)
5.CHECK HEADLAMP (HI) GROUND OPEN CIRCUIT
Check continuity between the headlamp harness connector and the ground.






Does continuity exist?
YES - Replace the headlamp (HI) bulb.
NO - Repair the harnesses or connectors.
6.CHECK HEADLAMP (HI) GROUND OPEN CIRCUIT (LH)
Check continuity between the headlamp LH harness connector and the ground.






Does continuity exist?
YES - GO TO 7.
NO - Repair the harnesses or connectors.
7.CHECK CONTINUITY BETWEEN HEADLAMP HIGH (RH) AND DAYTIME RUNNING LIGHT RELAY-1
1. Remove the daytime running light relay-1.
2. Check continuity between the headlamp RH harness connector and the daytime running light relay-1 harness connector.






Does continuity exist?
YES - GO TO 8.
NO - Repair the harness or connector.
8.CHECK THE DAYTIME RUNNING LIGHT RELAY-1 GROUND OPEN CIRCUIT
Check continuity between the daytime running light relay-1 harness connector and the ground.






Does continuity exist?
YES - GO TO 9.
NO - Repair the harness or connector.
9.CHECK THE DAYTIME RUNNING LIGHT RELAY-1
Check the daytime running light relay-1. Daytime Running Light Relay Circuit.
Is the daytime running light relay-1 normal?
YES - Replace the headlamp (HI) bulb.
NO - Replace the daytime running light relay-1.