DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

PRECAUTIONS FOR DIAGNOSIS
If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit (control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to See: Programming and Relearning\Description See: Programming and Relearning\Special Repair Requirement See: Steering Angle Sensor\Testing and Inspection\Description See: Steering Angle Sensor\Testing and Inspection\Special Repair Requirement.

DESCRIPTION

Basic Concept

• The most important point to perform trouble diagnosis is to understand systems (control and mechanism) in vehicle thoroughly.

• It is also important to clarify customer complaints before Inspection. First of all, reproduce symptom, and understand it fully.

Ask customer about his/her complaints carefully. In some cases, they will be necessary to check symptom by driving vehicle with customer.

CAUTION:
Customers are not professionals. Do not assume "maybe customer means..." or "maybe customer mentioned this symptom".

• It is essential to check symptoms right from beginning in order to repair a malfunction completely. For an intermittent malfunction, it is important to reproduce symptom based on interview with customer and past examples. Do not perform Inspection on ad hoc basis. Most intermittent malfunctions are caused by poor contacts. In this case, it will be effective to shake suspected harness or connector by hand. When repairs are performed without any symptom check, no one can judge if malfunction has actually been eliminated.
• After diagnostic, make sure to perform "ERASE MEMORY". Refer to See: Scan Tool Testing and Procedures\VDC/TCS/ABS.
• Always read "GI General Information" to confirm general precautions. Refer to See: Diagrams\Diagram Information and Instructions See: Diagrams\Diagram Information and Instructions See: Diagrams\Diagram Information and Instructions See: Diagrams\Diagram Information and Instructions.

Asking Complaints

• Complaints against malfunction vary depending on each person. It is important to clarify customer complaints.

• Ask customer about what symptoms are present and under what conditions. Use information to reproduce symptom while driving.
• It is also important to use diagnostic sheet so as not to miss information.

OVERALL SEQUENCE

• ABS warning lamp: Refer to See: Component Tests and General Diagnostics\VDC/TCS/ABS\ABS Warning Lamp\Diagnosis Procedure.
• Brake warning lamp: Refer to See: Component Tests and General Diagnostics\VDC/TCS/ABS\Brake Warning Lamp\Diagnosis Procedure.
• VDC OFF indicator lamp: Refer to See: Component Tests and General Diagnostics\VDC/TCS/ABS\VDC OFF Indicator Lamp\Diagnosis Procedure.
• SLIP indicator lamp: Refer to See: Component Tests and General Diagnostics\VDC/TCS/ABS\Slip Indicator Lamp\Diagnosis Procedure. Is ON/OFF timing normal?

YES >> GO TO 6.
NO >> GO TO 2.
6.PERFORM THE DIAGNOSIS BY SYMPTOM
Perform the diagnosis applicable to the symptom.
>> GO TO 7.
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 8.
8.FINAL CHECK
Perform the self-diagnosis again, and check that the malfunction is repaired completely. After checking, erase the self-diagnosis memory. Refer to See: Scan Tool Testing and Procedures\VDC/TCS/ABS.
Is no other DTC present and the repair completed?
YES >> Inspection End
NO >> GO TO 3.