Nissan Altima 2007-2012 Service Manual: Basic inspection

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

DETAILED FLOW

1.COLLECT THE INFORMATION FROM THE CUSTOMER

It is also important to clarify customer complaints before inspection. First of all, reproduce symptoms, and understand them fully. Ask customer about his/her complaints carefully. In some cases, it will be necessary to check symptoms by driving vehicle with customer.

>> GO TO 2.

2.BASIC INSPECTION

1. Check the power steering fluid leakage and the power steering fluid level. Refer to ST-8, "Inspection".

2. Check the drive belt tension. Refer to EM-16, "Checking Drive Belts" (QR25DE), EM-121, "Checking Drive Belts" (VQ35DE).

3. Check the power steering gear for damages, cracks and oil leakage. Refer to ST-8, "Inspection".

4. Check the relief oil pressure. Refer to ST-12, "Inspection".

>> GO TO 3.

3.TROUBLE DIAGNOSIS FOR SYMPTOM

Perform the diagnosis by symptom. Refer to STC-21, "Description".

>> GO TO 4.

4.FINAL CHECK

Check the input/output standard values for the power steering control unit.

Are the power steering control unit input/output values within standard ranges respectively? YES >> Inspection End

NO >> GO TO 2.

    Steering control system
    ...

    Function diagnosis
    EPS SYSTEM System Diagram CONTROL DIAGRAM System Description • The EPS system controls the power steering solenoid valve through the power steering control unit. • The valve driving vol ...

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