Content .. 386 387 388 389 ..

Nissan Xterra. Manual - part 388

EXL-40

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (HI) CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp connector E7 (with

DTRL), E11(without DTRL) or E107.

3. Turn the ignition switch ON.

4. Turn the high beam headlamps ON.

5. With the high beam headlamps ON, check the voltage between

the combination lamp connector and ground.

Is battery voltage present?

YES

>> GO TO 4

>> GO TO 3

CHECK HEADLAMP (HI) CIRCUIT FOR OPEN

1. Turn the ignition switch OFF.

2. Disconnect IPDM E/R connector E123.

3. Check continuity between the IPDM E/R harness connector (A)

and the front combination lamp harness connector (B).

Does continuity exist?

YES

>> Replace IPDM E/R. Refer to

PCS-27, "Removal and Installation"

>> Repair the harnesses or connectors.

CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT

Check continuity between the front combination lamp harness con-

nector terminal and ground.

Does continuity exist?

YES

>> Inspect the headlamp bulb.

NO (Except LH with DTRL)>> Repair the harness.

NO (LH with DTRL)>> GO TO 5.

CHECK CONTINUITY BETWEEN FRONT HEADLAMP LH (HI) AND DAYTIME LIGHT RELAY 1

1. Disconnect daytime light relay 1 connector.

2. Check continuity between front headlamp LH harness connector and daytime light relay 1 harness con-

nector.

(+)

(

−)

Voltage

Connector

Terminal

E7 (with DTRL)

Ground

Battery voltage

E11 (without DTRL)

E107

WKIA4989E

Continuity

Connector

Terminal

Connector

Terminal

E123

E7 (with DTRL)

Yes

E11 (without DTRL)

E107

ALLIA0623GB

Connector

Terminal

—

Continuity

E7 (with DTRL)

Ground

Yes

E11 (without DTRL)

E107

ALLIA0624GB

Front headlamp LH

Daytime light relay 1

Continuity

Connector

Terminal

Connector

Terminal

E103

Yes

HEADLAMP (HI) CIRCUIT

EXL-41

< DTC/CIRCUIT DIAGNOSIS >

EXL

Does continuity exist?

YES

>> GO TO 6.

>> Repair the harness or connector.

CHECK DAYTIME LIGHT RELAY 1 GROUND CIRCUIT

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

Does continuity exist?

YES

>> GO TO 7.

>> Repair the harness or connector.

CHECK DAYTIME LIGHT RELAY 1

Check daytime light relay 1. Refer to

EXL-47, "Component Inspection"

Is the inspection result normal?

YES

>> Inspect the headlamp bulb.

>> Replace daytime light relay 1.

Daytime light relay 1

Ground

Continuity

Connector

Terminal

E103

Yes

EXL-42

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (LO) CIRCUIT

HEADLAMP (LO) CIRCUIT

Description

INFOID:0000000009484891

The IPDM E/R (intelligent power distribution module engine room) controls the headlamp low relay based on

inputs from the BCM via the CAN communication lines. When the headlamp low relay is energized, power

flows through fuses 40 and 41, located in the IPDM E/R. Power then flows to the front combination lamps to

the headlamp low beam.

Component Function Check

INFOID:0000000009484892

CHECK HEADLAMP (LO) OPERATION

WITHOUT CONSULT

1. Start IPDM E/R auto active test. Refer to

PCS-9, "Diagnosis Description"

2. Check that the headlamp is turned ON.

NOTE:

HI/LO is repeated 1 second each when using the IPDM E/R auto active test.

WITH CONSULT

1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.

2. With the test items operating, check that the headlamp is turned ON.

Is the headlamp turned ON?

YES

>> Headlamp (LO) is normal.

>> Refer to

EXL-42, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009484893

Regarding Wiring Diagram information, refer to

EXL-83, "Wiring Diagram"

(without DTRL) or

EXL-87, "Wiring

Diagram"

(with DTRL).

CHECK HEADLAMP (LO) FUSES

1. Turn the ignition switch OFF.

2. Check that the following fuses are not open.

Is the fuse open?

YES

>> Replace the fuse after repairing the affected circuit.

>> GO TO 2

CHECK HEADLAMP (LO) OUTPUT VOLTAGE

: Headlamp ON

OFF

: Headlamp OFF

Unit

Location

Fuse No.

Capacity

Headlamp LO (LH)

IPDM E/R

15A

Headlamp LO (RH)

IPDM E/R

15A

HEADLAMP (LO) CIRCUIT

EXL-43

< DTC/CIRCUIT DIAGNOSIS >

EXL

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp connector.

3. Turn the ignition switch ON.

4. Turn the low beam headlamps ON.

5. With the low beam headlamps ON, check the voltage between

the combination lamp connector and ground.

Is battery voltage present?

YES

>> GO TO 8

NO (Except LH with DTRL)>>CHECK HEADLAMP (LO) CIRCUIT FOR OPEN GO TO 3

NO (LH with DTRL)>>CHECK HEADLAMP (LO) CIRCUIT FOR OPEN GO TO 4

CHECK HEADLAMP (LO) CIRCUIT FOR OPEN (EXCEPT LH WITH DTRL)

1. Turn the ignition switch OFF.

2. Disconnect IPDM E/R connector E123.

3. Check continuity between the IPDM E/R harness connector (A)

and the front headlamp harness connector (B).

Does continuity exist?

YES

>> Replace IPDM E/R. Refer to

PCS-27, "Removal and Installation"

>> Repair the harnesses or connectors.

CHECK HEADLAMP (LO) CIRCUIT FOR OPEN (LH WITH DTRL)

1. Turn the ignition switch OFF.

2. Disconnect IPDM E/R connector E123 and daytime light relay 2 connector.

3. Check continuity between the IPDM E/R harness connector and the daytime light relay 2 harness connec-

tor.

Does continuity exist?

YES

>> GO TO 5

>> Repair the harnesses or connectors.

CHECK DAYTIME LIGHT RELAY 2 CIRCUIT

1. Check continuity between the daytime light relay 2 harness connector and the front headlamp LH harness

connector.

2. Check continuity between the daytime light relay 2 harness connector and ground.

(+)

(

−)

Voltage

Connector

Terminal

E7 (with DTRL)

Ground

Battery voltage

E11 (without DTRL)

E107

ALLIA0625GB

Continuity

Connector

Terminal

Connector

Terminal

E123

E11

Yes

E107

ALLIA0626GB

IPDM E/R

Daytime light relay 2

Continuity

Connector

Terminal

Connector

Terminal

E123

E104

Yes

Daytime light relay 2

Front headlamp LH

Continuity

Connector

Terminal

Connector

Terminal

E104

Yes

Content .. 386 387 388 389 ..