Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Detailed Flow
- GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred).
GO TO 2.
- CHECK DTC WITH BCM AND IPDM E/R
- Check "Self Diagnostic Result" with CONSULT-III.
- Perform the following procedure if DTC is displayed.
- Record DTC and freeze frame data (Print them out with CONSULT-III.)
- Erase DTC.
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
- Check related service bulletins for information.
Is any symptom described and any DTC detected?
Symptom is described, DTC is displayed: GO TO 3.
Symptom is described, DTC is not displayed: GO TO 4.
Symptom is not described, DTC is displayed: GO TO 5.
- CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in "Data Monitor" mode and check real time diagnosis results.
Verify relationship between the symptom and the condition when the symptom is detected.
GO TO 5.
- CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in "Data Monitor " mode and check real time diagnosis results.
Verify relationship between the symptom and the condition when the symptom is detected.
GO TO 6.
- PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
At this time, always keep CONSULT-III connected to the vehicle, and check diagnostic results in real time.
If two or more DTCs are detected, refer to "DTC INSPECTION PRIORITY CHART " and determine trouble diagnosis order.
NOTE:- Freeze frame data is useful if the DTC is not detected.
- Perform Component Function Check if DTC Confirmation Procedure is not included in article. This simplified check procedure is an effective alternative though DTC cannot be detected during this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation Procedure.
Is DTC detected?
YES: GO TO 8.
NO: Refer to "INTERMITTENT INCIDENT ".
- PERFORM BASIC INSPECTION
Perform "BASIC INSPECTION ".
Inspection End: GO TO 7.
- DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to following symptom tables based on the confirmed symptom in step 4, and determine the trouble diagnosis order based on possible causes and symptoms.
- Intelligent Key system/engine start function: "SYMPTOM TABLE ".
- Vehicle security system: "SYMPTOM TABLE ".
- Nissan vehicle immobilizer system-NATS: "SYMPTOM TABLE ".
GO TO 8.
- DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE: The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also required for the circuit check in the Diagnostic Procedure.Is malfunctioning part detected?
YES: GO TO 9.
NO: Check voltage of related BCM terminals using CONSULT-III.
- REPAIR OR REPLACE THE MALFUNCTIONING PART
- Repair or replace the malfunctioning part.
- Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair or replacement.
- Check DTC. If DTC is displayed, erase it.
GO TO 10.
- FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check again, and then check that the malfunction has been fully repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that the symptom is not detected.
Is the inspection result normal?
NO (DTC is detected): GO TO 8.
NO (Symptom remains): GO TO 6.
YES: Inspection End.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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