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Home >> Infiniti >> 2011 >> M37x AWD V6-3.7L (VQ37VHR) >> Repair and Diagnosis >> Steering and Suspension >> Steering >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Work Flow >> With 4WAS

With 4WAS





DIAGNOSIS AND REPAIR WORK FLOW


Work Flow


DETAILED FLOW
1.INTERVIEW FROM THE CUSTOMER
Clarify customer complaints before inspection. First of all, perform an interview utilizing Diagnostic Work Sheet, "Diagnostic
Work Sheet" and reproduce symptoms as well as fully understand it. Ask customer about his/her complaints carefully. Check symptoms by driving vehicle with customer, if necessary.
CAUTION:
Customers are not professional. Never guess easily like "maybe the customer means that...," or
"maybe the customer mentions this symptom".
- GO TO 2.
2.CHECK SYMPTOM
Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. Also check that the symptom is not caused by protection function. Protection Function (4WAS Front Control Unit), Protection Function (4WAS Main Control Unit).
CAUTION:
When the symptom is caused by normal operation, fully inspect each portion and obtain the understanding of customer that the symptom is not caused by a malfunction.
- GO TO 3.
3.CHECK CURRENT STATE
Start the engine.
CAUTION:
Never drive the vehicle.
Does 4WAS warning lamp turn ON?
YES - GO TO 4.
NO - GO TO 12.
4.PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform self-diagnosis for "4WAS(MAIN)/RAS/HICAS".
Is DTC except "C1930" or "C1931" detected?
YES - GO TO 8.
NO - Record or print self-diagnosis results. GO TO 5.
5.RECHECK SYMPTOM (4WAS FRONT CONTROL UNIT)
With CONSULT-III
1. Turn the ignition switch OFF, and then wait for 10 seconds or more.
2. Perform self-diagnosis for "4WAS(FRONT)".
3. Record the values of "DATA MONITOR" about each DTC detected when performing self-diagnosis.
4. Record the values of "FREEZE FRAME DATA" about each DTC detected when performing self-diagnosis.
5. Erase self-diagnostic results for "4WAS(FRONT)".
CAUTION:
- Never erase the self-diagnostic results (records) history when replacing 4WAS front control unit.
- Erase the memory of self-diagnostic results (records) after printing out or recording all the values of "DATA MONITOR".
6. Perform DTC confirmation procedures for the error detected system.
NOTE:
- If some DTCs are detected at the same time, determine the order for performing the diagnosis based on
4WAS Front Control Unit.
- IF DTC is not detected, refer to the recorded values of "FREEZE FRAME DATA".
Is any DTC detected?
YES - GO TO 6.
NO - Check harness and connectors based on the information obtained by interview. Intermittent Incident, "Intermittent Incident".
6.REPAIR OR REPLACE ERROR-DETECTED PARTS
1. Repair or replace error-detected parts.

CAUTION:
Reconnect part or connector after repairing or replacing.
2. When DTC is detected, erase self-diagnostic results for "4WAS(FRONT)".
- GO TO 7.
7.RECHECK SYMPTOM (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform DTC confirmation procedures for the error detected system.

NOTE:
- If some DTCs are detected at the same time, determine the order for performing the diagnosis based on STC-61, "DTC Inspection Priority Chart".
- IF DTC is not detected, refer to the recorded values of "FREEZE FRAME DATA".
Is any DTC detected?
YES - GO TO 6.
NO - GO TO 8.
8.PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform self-diagnosis for "4WAS(MAIN)/RAS/HICAS".
Is any DTC detected?
YES - Record or print self-diagnosis results. GO TO 9.
NO - GO TO 12.
9.RECHECK SYMPTOM (4WAS MAIN CONTROL UNIT)
With CONSULT-III
1. Turn the ignition switch OFF, and then wait for 10 seconds or more.
2. Record the values of "DATA MONITOR" about each DTC detected when performing self-diagnosis.
3. Record the values of "FREEZE FRAME DATA" about each DTC detected when performing self-diagnosis.
4. Erase self-diagnostic results for "4WAS(MAIN)/RAS/HICAS".

CAUTION:
- Never erase the self-diagnostic results (records) history when replacing 4WAS main control unit.
- Erase the memory of self-diagnostic results (records) after printing out or recording all the values of "DATA MONITOR".
5. Perform DTC confirmation procedures for the error detected system.

NOTE:
- If some DTCs are detected at the same time, determine the order for performing the diagnosis based on STC-67, "DTC Inspection Priority Chart".
- IF DTC is not detected, refer to the recorded values of "FREEZE FRAME DATA".
Is any DTC detected?
YES - GO TO 10.
NO - Check harness and connectors based on the information obtained by interview. Circuit Inspection.
10.REPAIR OR REPLACE ERROR-DETECTED PARTS
1. Repair or replace error-detected parts.

CAUTION:
Reconnect part or connector after repairing or replacing.
2. When DTC is detected, erase self-diagnostic results for "4WAS(MAIN)/RAS/HICAS".
- GO TO 11.
11.RECHECK SYMPTOM (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform DTC confirmation procedures for the error detected system.

NOTE:
- If some DTCs are detected at the same time, determine the order for performing the diagnosis based on STC-67, "DTC Inspection Priority Chart".
- IF DTC is not detected, refer to the recorded values of "FREEZE FRAME DATA".
Is any DTC detected?
YES - GO TO 10.
NO - GO TO 13.
12.IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS
Estimate error-detected system based on symptom diagnosis and perform inspection.
Can the error-detected system be identified?
YES - GO TO 13.
NO - Check harness and connectors based on the information obtained by interview. Intermittent Incident.
13.FINAL CHECK
With CONSULT-III
1. Check the reference value for 4WAS front control unit and 4WAS main control unit.
2. Recheck the symptom and check that symptom is not reproduced on the same conditions.
Is the symptom reproduced?
YES - GO TO 4.
NO - INSPECTION END
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