Nissan Sentra. Manual - part 471

DIAGNOSIS AND REPAIR WORK FLOW

EXL-87

< BASIC INSPECTION >

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EXL

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YES

>> Inspection End.

NO

>> GO TO 3

EXL-88

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (HI) CIRCUIT

DTC/CIRCUIT DIAGNOSIS

HEADLAMP (HI) CIRCUIT

Description

INFOID:0000000009757507

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

inputs from the BCM over the CAN communication lines. When the headlamp high relay is energized, power

flows through fuses 41 and 42, located in the IPDM E/R. Power then flows to the front combination lamps to

the headlamp high beam.

Component Function Check

INFOID:0000000009757508

1.

CHECK HEADLAMP (HI) OPERATION

WITHOUT CONSULT

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

EXL-24, "Diagnosis Description"

 (with Intelligent Key system) or

EXL-28, "Diagnosis Description"

 (without Intelligent Key system).

2. Check that the headlamp switches to the high beam.

NOTE:

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

CONSULT

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

2. While operating the test items, check that the headlamp switches to the high beam.

Is the inspection result normal?

YES

>> Headlamp (HI) circuit is normal.

NO

>> Refer to 

EXL-88, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009757509

Regarding Wiring Diagram information, refer to 

EXL-33, "Wiring Diagram"

.

1.

CHECK HEADLAMP (HI) FUSES

1. Turn the ignition switch OFF.

2. Check that the following fuses are not blown.

Is the fuse blown?

YES

>> Replace the fuse after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK HEADLAMP (HI) OUTPUT VOLTAGE

CONSULT ACTIVE TEST

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp harness connector in question.

3. Turn the ignition switch ON.

4. Select EXTERNAL LAMP of IPDM E/R active test item.

5. With EXTERNAL LAMP ON, check the voltage between the combination lamp connector and ground.

HI

: Headlamp switches to the high beam.

OFF

: Headlamp OFF

Unit

Location

Fuse No.

Capacity

Headlamp HI (LH) 

IPDM E/R

42

10A

Headlamp HI (RH) 

IPDM E/R

41

10A

HEADLAMP (HI) CIRCUIT

EXL-89

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

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.

3. Check continuity between the IPDM E/R harness connector and the front combination lamp harness con-

nector.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation"

 (with Intelligent Key system) or

PCS-58, "Removal and Installation"

 (without Intelligent Key system).

NO

>> Repair or replace the harness or connector.

4.

CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT

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

Is the inspection result normal?

YES

>> Inspect the headlamp bulb.

NO

>> Repair or replace the harness or connector.

(+)

(

−)

Voltage

Connector

Terminal

RH

E20

2

Ground

Battery voltage

LH

E21

IPDM E/R

Front combination lamp

Continuity

Connector

Terminal

Connector

Terminal

RH

E43

5

E20

2

Yes

LH

6

E21

Connector

Terminal

—

Continuity

RH

E20 

6

Ground

Yes

LH

E21

EXL-90

< DTC/CIRCUIT DIAGNOSIS >

HEADLAMP (LO) CIRCUIT

HEADLAMP (LO) CIRCUIT

Description

INFOID:0000000009757510

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

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

flows through fuses 43 and 44, located in the IPDM E/R. Power then flows to the front combination lamps to

the headlamp low beam.

Component Function Check

INFOID:0000000009757511

1.

CHECK HEADLAMP (LO) OPERATION

WITHOUT CONSULT

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

EXL-24, "Diagnosis Description"

 (with Intelligent Key system) or

EXL-28, "Diagnosis Description"

 (without Intelligent Key system).

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

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

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

Is the inspection result normal?

YES

>> Headlamp (LO) is normal.

NO

>> Refer to 

EXL-90, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009757512

Regarding Wiring Diagram information, refer to 

EXL-33, "Wiring Diagram"

.

1.

CHECK HEADLAMP (LO) FUSES

1. Turn the ignition switch OFF.

2. Check that the following fuses are not blown.

Is the fuse blown?

YES

>> Replace the fuse after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK HEADLAMP (LO) OUTPUT VOLTAGE

CONSULT

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp harness connector in question.

3. Turn the ignition switch ON.

4. Select EXTERNAL LAMP of IPDM E/R active test item.

5. With EXTERNAL LAMP ON, check the voltage between the combination lamp connector and ground.

LO

: Headlamp ON

OFF

: Headlamp OFF

Unit

Location

Fuse No.

Capacity

Headlamp LO (RH) 

IPDM E/R

44

15A

Headlamp LO (LH) 

IPDM E/R

43

15A

(+)

(

−)

Voltage

Connector

Terminal