1.OBTAIN INFORMATION ABOUT SYMPTOM

1. Refer to Diagnostic Work Sheet (GT-R certified NISSAN dealer) and interview the customer to obtain as much malfunction information (conditions and environment when the malfunction occurred) as possible when the customer brings the vehicle in.
2. Check the following:

- Service history
- Refer to Precautions Before Performing Diagnosis.
- Harnesses and connectors malfunction. Refer to Intermittent Incident.

>> GO TO 2.
2.CHECK DTC

1. Before checking the malfunction, check whether any DTC exists.
2. If DTC exists, perform the following operations.

- Record the DTC and freeze frame data. (Print out using CONSULT-III)
- Erase DTCs.
- Check that the root cause clarified with DTC and malfunction information described by the customer.

3. Check the information of related “Technical Bulletin” and others also.

Do malfunction information and/or DTC exist?
Malfunction information and DTC exist.>>GO TO 3.
Malfunction information exists but no DTC.>>GO TO 4.
No malfunction information, but DTC exists.>>GO TO 5.
3.REPRODUCE MALFUNCTION SYMPTOM
Check any malfunctions described by the customer, except the transmission warning lamp illuminated or blinking, on the vehicle.
Also inspect whether the symptom is a fail safe or normal operation. Refer to Fail Safe (GT-R certified NISSAN dealer).
When a malfunction symptom is reproduced, the “Diagnostic Work Sheet” is effective. Refer to Diagnostic Work Sheet (GT-R certified NISSAN dealer).
Check the causal relationship between the symptom and the conditions in which the malfunction described by the customer occurs.
>>GO TO 5.
4.REPRODUCE MALFUNCTION SYMPTOM
Check the malfunction described by the customer on the vehicle.
Also whether the symptom is a fail safe or normal operation. Refer to Fail Safe (GT-R certified NISSAN dealer).
When a malfunction symptom is reproduced, the “Diagnostic Work Sheet” is effective. Refer to Diagnostic Work Sheet (GT-R certified NISSAN dealer).
Check the causal relationship between the symptom and the conditions in which the malfunction described by the customer occurs.
>>GO TO 6.
5.PERFORM “DTC CONFIRMATION PROCEDURE”
Perform “DTC CONFIRMATION PROCEDURE” for the applicable DTC to check if DTC is detected again.
Refer to DTC Inspection Priority Chart (GT-R certified NISSAN dealer) if multiple DTCs are detected, and then judge the order for performing the diagnosis.
NOTE：
If no DTC is detected, refer to the freeze frame data.
Is any DTC detected?
YES>>GO TO 7.
NO>>Check according to Intermittent Incident.
6.IDENTIFY MALFUNCTIONING SYSTEM
Identify the location where trouble diagnosis starts based on the possible causes and symptoms from the symptom inspection result in step 4.
>>GO TO 8.
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.
>>GO TO 8.
8.FINAL CHECK
Perform “DTC CONFIRMATION PROCEDURE” again to check that the repair is correctly performed.
Check that malfunctions obtained from the customer are not reproduced, referring to the symptom inspection result in step 3 or 4.
Is DTC or malfunction symptom reproduced?
YES-1>>DTC is reproduced: GO TO 5.
YES-2>>Malfunction symptom is reproduced: GO TO 6.
NO>>Before delivering the vehicle to the customer, check that DTC is erased.