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 ...

Other materials:

How to proceed with troubleshooting
HINT: Troubleshoot in accordance with the procedures on the following pages. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 3 PROBLEM SYMPTOMS TABLE When problem is not listed on problem symptoms table, proceed to A.  When problem is listed on pro ...

Passenger Side Buckle Switch Circuit Malfunction
DTC B1771 Passenger Side Buckle Switch Circuit Malfunction DESCRIPTION The passenger side buckle switch circuit consists of the occupant classification ECU and the front seat inner belt assembly RH. DTC B1771 is recorded when a malfunction is detected in the passenger side buckle switch ci ...

Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm: Unlock the doors using the entry function (vehicles with a smart key system) or wireless remote control. Vehicles without a smart key system: Turn the engine switch to the “ACC” or “ON” position, or start the engine. Veh ...

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