Headlamp (Hi) Circuit

HEADLAMP (HI) CIRCUIT





Description
The high beam solenoid drives the mobile valve shade. And the mobile valve shade switches the high beam and low beam of headlamp.





- When the headlamp high relay is turned ON, magnetic force is applied to the high beam solenoid (1) by a current. The mobile valve shade (2) is switched to the high beam position.
- When the headlamp high relay is turned OFF, the current stops.
The mobile valve shade returns to the low beam position automatically.




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 switches to the high beam.

Hi : Headlamp switches to the high beam.
Off : Headlamp OFF


NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.
Does the headlamp switch to the high beam?
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 front combination lamp 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 IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the front combination lamp harness connector.





Does continuity exist?
YES - Replace the front combination lamp.
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 FRONT COMBINATION LAMP (HI) SHORT CIRCUIT
1. Disconnect 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.)