Nissan Xterra. Instruction — part 379

EXL-4

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

AWLIA1837GB

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

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DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Find out what the customer's concerns are.

>> GO TO 2

2.

SYMPTOM CHECK

Verify the symptom from the customer's information.

>> GO TO 3

3.

BASIC INSPECTION

Check the operation of each part. Check that any concerns occur other than those mentioned in the customer

interview.

>> GO TO 4

4.

SELF-DIAGNOSIS WITH CONSULT

Perform the self diagnosis with CONSULT. Check that any DTC is detected.
Is any DTC detected?

YES

>> GO TO 5

NO

>> GO TO 6

5.

TROUBLE DIAGNOSIS BY DTC

Perform the trouble diagnosis for the detected DTC. Specify the malfunctioning part.

>> GO TO 9

6.

FAIL-SAFE ACTIVATION CHECK

Determine if the customer's concern is related to fail-safe activation.
Does the fail-safe activate?

YES

>> GO TO 7

NO

>> GO TO 8

7.

SYSTEM DIAGNOSIS

Perform the system diagnosis for the system in which the fail-safe activates. Specify the malfunctioning part.

>> GO TO 9

8.

SYMPTOM DIAGNOSIS

Perform the symptom diagnosis. Specify the malfunctioning part.

>> GO TO 9

9.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 11

10.

REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT)

Perform the self diagnosis with CONSULT. Verify that no DTCs are detected. Erase all DTCs detected prior to

the repair. Verify that DTC is not detected again.
Is any DTC detected?

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

YES

>> GO TO 5

NO

>> GO TO 11

11.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.
Does it operate normally?

YES

>> Inspection End.

NO

>> GO TO 3

HEADLAMP

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< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

HEADLAMP

System Diagram

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System Description

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Control of the headlamp system operation is dependent upon the position of the combination switch (lighting

and turn signal switch). When the combination switch (lighting and turn signal switch) is placed in the 2nd posi-

tion, the BCM (body control module) receives input requesting the headlamps and park lamps to illuminate.

This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via the CAN

communication lines. The CPU (central processing unit) of the IPDM E/R controls the headlamp high and

headlamp low relay coils. When energized, these relays direct power to the respective headlamps, which then

illuminate.

HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION

With the combination switch (lighting and turn signal switch) in the 2ND position and placed in HIGH position,

the BCM receives input requesting the headlamp high beams to illuminate. The flash to pass feature can be

used any time and also sends a signal to the BCM. This input is communicated to the IPDM E/R via the CAN

communication lines. The CPU of the combination meter controls the ON/OFF status off the HIGH BEAM indi-

cator. The CPU of the IPDM E/R controls the headlamp high relay coil which supplies power to the high beam

headlamps.

The combination meter receives a high beam request signal (ON) via the CAN communication lines and turns

the high beam indicator lamp ON.

Component Parts Location

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AWLIA1909GB

WKIA4957E