DRIVER CONTROLS › EXTERIOR LIGHTING SYSTEM › COMPONENT DIAGNOSIS

HEADLAMP (LO) CIRCUIT

XENON TYPE

Description
Component Function Check
Diagnosis Procedure

Description

Headlamp (LO) circuit is connected to HID control unit integrated in the headlamp. Headlamp (LO) circuit turns xenon headlamp ON.
For the details of HID control unit and the xenon headlamp, refer to Description.

Component Function Check

1.CHECK HEADLAMP (LO) OPERATION

IPDM E/R AUTO ACTIVE TEST

Activate IPDM E/R auto active test. Refer to Diagnosis Description.
Check that the headlamp (LO) is turned ON.

CONSULT-III ACTIVE TEST

Select “EXTERNAL LAMPS” of IPDM E/R active test item.
With operating the test items, check that the headlamp (LO) is turned ON.
Lo
: Headlamp (LO) ON
Off
: Headlamp (LO) OFF

Is the headlamp (LO) turned ON/OFF?

YES>>Headlamp (LO) is normal.

NO>>Refer to Diagnosis Procedure.

Diagnosis Procedure

1.CHECK HEADLAMP (LO) OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

Turn the ignition switch OFF.
Disconnect the front combination lamp connector.
Turn the ignition switch ON.
Select “EXTERNAL LAMPS” of IPDM E/R active test item.
With operating the test items, check the voltage between the IPDM E/R harness connector and the ground.
Terminals
Test item
Voltage
(Approx.)
(+)
(−)
IPDM E/R
Ground
EXTERNAL LAMPS
Connector
Terminal
RH
E8
83
Lo
Battery
voltage
Off
0 V
LH
84
Lo
Battery
voltage
Off
0 V

Is the measurement value normal?

YES>>GO TO 2.

NO>>GO TO 3.

2.CHECK HEADLAMP (LO) OPEN CIRCUIT

Turn the ignition switch OFF.
Disconnect IPDM E/R connector.
Check continuity between the IPDM E/R harness connector and the front combination lamp harness connector.
IPDM E/R
Front combination lamp
Continuity
Connector
Terminal
Connector
Terminal
RH
E8
83
E58
5
Existed
LH
84
E28
5

Does continuity exist?

YES>>GO TO 5.

NO>>Repair the harnesses or connectors.

3.CHECK HEADLAMP (LO) FUSE

Turn the ignition switch OFF.
Check that the following fuses are not fusing.
Unit
Lotion
Fuse No.
Capacity
Headlamp LO (RH)
IPDM E/R
#57
15 A
Headlamp LO (LH)
IPDM E/R
#56
15 A

Is the fuse fusing?

YES>>GO TO 4.

NO>>Replace IPDM E/R.

4.CHECK HEADLAMP (LO) SHORT CIRCUIT

Disconnect the IPDM E/R connector.
Check continuity between the IPDM E/R harness connector and the ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
RH
E8
83
Not existed
LH
84

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 (LO) GROUND OPEN CIRCUIT

Check continuity between the front combination lamp harness connector and the ground.

Front combination lamp			Ground	Continuity
Connector		Terminal
RH	E58	1		Existed
LH	E28	1

Does continuity exist?

YES>>Perform the xenon headlamp diagnosis. Refer to Description.

NO>>Repair the harnesses or connectors.

Terminals				Test item	Voltage (Approx.)
(+)			(−)
IPDM E/R			Ground	EXTERNAL LAMPS
Connector		Terminal
RH	E8	83		Lo	Battery voltage
				Off	0 V
LH		84		Lo	Battery voltage
				Off	0 V

Unit	Lotion	Fuse No.	Capacity
Headlamp LO (RH)	IPDM E/R	#57	15 A
Headlamp LO (LH)	IPDM E/R	#56	15 A