Toyota RAV4 manuals

Toyota Sienna Service Manual: Symptom confirmation and diagnostic trouble code

HINT:

The diagnostic system in the SIENNA has various functions.

Symptom confirmation and diagnostic trouble code

Symptom confirmation and diagnostic trouble code

  1. DTC CHECK

  1. MAKE A NOTE OF DTCS DISPLAYED AND THEN CLEAR MEMORY

  1. SYMPTOM CONFIRMATION

Result

  1. SIMULATION TEST USING SYMPTOM SIMULATION METHODS

  1. DTC CHECK

Result

  1. SYMPTOM CONFIRMATION

Result

If a DTC was displayed in the initial DTC check, the problem may have occurred in a wire harness or connector in that circuit in the past. Check the wire harness and connectors.

TROUBLESHOOTING OF EACH PROBLEM SYMPTOM

The problem still occurs in a place other than the diagnostic circuit (the DTC displayed first is either for a past problem or a secondary problem).

Customer problem analysis
HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand w ...

Symptom simulation
HINT: The most difficult case in troubleshooting is when no problem symptoms occur. In such a case, a thorough problem analysis must be carried out. A simulation of the same or similar conditions ...

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1. DESCRIPTION  When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's clearance warning ECU. The clearance warn ...

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