Nissan Titan A60. Manual - part 496

HEADLAMP (HI) CIRCUIT

EXL-39

< DTC/CIRCUIT DIAGNOSIS >

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B

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Is the fuse open?

YES

>> Repair the harness and replace the fuse.

NO

>> GO TO 2.

2.

CHECK HEADLAMP (HI) OUTPUT VOLTAGE

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp connector E6 or E108.

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.

Are the voltage readings as specified?

YES

>> GO TO 4.

NO

>> GO TO 3.

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-28, "Removal and Installation of IPDM E/R"

NO

>> Repair the harnesses or connectors.

4.

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.

5.

CHECK CONTINUITY BETWEEN FRONT COMBINATION LAMP LH (HI) AND DAYTIME LIGHT RELAY

1. Disconnect daytime light relay connector.

Unit

Location

Fuse No.

Capacity

Headlamp HI (LH) 

IPDM E/R

35

10A

Headlamp HI (RH) 

IPDM E/R

34

10A

(+)

(

−)

Voltage

Connector

Terminal

LH

E6

2

Ground

Battery voltage

RH

E108

2

ALLIA0386GB

A

B

Continuity

Connector

Terminal

Connector

Terminal

LH

E123

55

E6

2

Yes

RH

56

E108

2

ALLIA0387GB

Connector

Terminal

—

Continuity

LH

E6

3

Ground

Yes

RH

E108

3

ALLIA0388GB

EXL-40

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (HI) CIRCUIT

2. Check continuity between front combination lamp LH harness connector and daytime light relay harness

connector.

Does continuity exist?

YES

>> GO TO 6.

NO

>> Repair the harness or connector.

6.

CHECK DAYTIME LIGHT RELAY GROUND CIRCUIT

Check continuity between daytime light relay harness connector and ground.

Does continuity exist?

YES

>> GO TO 7.

NO

>> Repair the harness or connector.

7.

CHECK DAYTIME LIGHT RELAY FUSE

Check that the following fuses are not open.

Is the fuse open?

YES

>> Replace the fuse after repairing the affected circuit.

NO

>> GO TO 8.

8.

CHECK DAYTIME LIGHT CIRCUIT FOR OPEN

1. Disconnect IPDM E/R connector E119 and E122.

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

tor.

Does continuity exist?

YES

>> GO TO 9

NO

>> Repair the harnesses or connectors.

9.

CHECK DAYTIME LIGHT RELAY

Check daytime light relay. Refer to 

EXL-40, "Component Inspection"

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-28, "Removal and Installation of IPDM E/R"

NO

>> Replace daytime light relay.

Component Inspection

INFOID:0000000006607848

1.

 CHECK DAYTIME LIGHT RELAY

1. Turn ignition switch OFF.

Front combination lamp LH

Daytime light relay

Continuity

Connector

Terminal

Connector

Terminal

E6

3

E103

3

Yes

Daytime light relay

Ground

Continuity

Connector

Terminal

E103

4

Yes

Unit

Location

Fuse No.

Capacity

Daytime light relay 

IPDM E/R

45

10A

IPDM E/R

Daytime light relay

Continuity

Connector

Terminal

Connector

Terminal

E119

10

E103

2

Yes

5

E122

44

1

HEADLAMP (HI) CIRCUIT

EXL-41

< DTC/CIRCUIT DIAGNOSIS >

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2. Remove daytime light relay.

3. Check the continuity between daytime light relay terminals under the following conditions.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace daytime light relay

Terminals

Condition

Continuity

3 and 5

12V direct current supply between terminals 1 and 2

Yes

No current supply

No

3 and 4

12V direct current supply between terminals 1 and 2

No

No current supply

Yes

EXL-42

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (LO) CIRCUIT

HEADLAMP (LO) CIRCUIT

Description

INFOID:0000000006179026

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:0000000006179027

1.

CHECK HEADLAMP (LO) OPERATION

WITHOUT CONSULT-III

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

PCS-11, "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.

CONSULT-III

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.

NO

>> Refer to 

EXL-42, "Diagnosis Procedure - Without Daytime Light System"

, 

EXL-43, "Diagnosis

Procedure - With Daytime Light System"

.

Diagnosis Procedure - Without Daytime Light System

INFOID:0000000006179028

Regarding Wiring Diagram information, refer to 

EXL-79, "Wiring Diagram"

.

1.

CHECK HEADLAMP (LO) FUSES

1. Turn the ignition switch OFF.

2. Check that the following fuses are not open.

Is the fuse open?

YES

>> Repair the harness and replace the fuse.

NO

>> GO TO 2.

2.

CHECK HEADLAMP (LO) OUTPUT VOLTAGE

LO

: Headlamp ON

OFF

: Headlamp OFF

Unit

Location

Fuse No.

Capacity

Headlamp LO (LH) 

IPDM E/R

40

15A

Headlamp LO (RH) 

IPDM E/R

41

15A