Nissan Frontier D40. Instruction — part 633
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-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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< 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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< FUNCTION DIAGNOSIS >
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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
INFOID:0000000005274702
AWLIA1715GB
WKIA4957E
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< FUNCTION DIAGNOSIS >
HEADLAMP
Component Description
INFOID:0000000005274703
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.
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