Nissan Frontier D40. Manual - part 633

DIAGNOSIS AND REPAIR WORKFLOW

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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-III

Perform the self diagnosis with CONSULT-III. 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 10.

10.

REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)

Perform the self diagnosis with CONSULT-III. Verfied 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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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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FUNCTION DIAGNOSIS

HEADLAMP

System Diagram

INFOID:0000000005561486

System Description

INFOID:0000000005561487

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 LH high,
headlamp RH 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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AWLIA1715GB

WKIA4957E

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HEADLAMP

Component Description

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1.

IPDM E/R E122, E123, E124

2.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter M24

Part name

Description

BCM

• Receives combination switch (lighting and turn signal switch) 

request via BCM combination switch reading function.

• Sends headlamp high/low request signal to the IPDM E/R.

IPDM E/R

Activates the headlamp high and headlamp low relays upon re-
quest from the BCM.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.