TROUBLE DIAGNOSIS PFP:00004
How to Proceed With Diagnosis AFS00113
? Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
? It is also important to clarify customer complaints before inspec-
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
Customers are not professionals. Do not assume ?maybe cus-
tomer 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 diagnosis, make sure to carry out ?erase memory?. Refer to
Operation Procedure" .
? For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.
? Always read ?GI General Information? to confirm general precautions. Refer to GI-4, "General Precau-