Toyota Highlander manuals

Toyota Highlander Service Manual: Symptom confirmation and diagnostic trouble code

HINT: The diagnostic system in the HIGHLANDER has various functions.

Symptom confirmation and diagnostic trouble code


1 DTC CHECK

2 MAKE A NOTE OF DTCS DISPLAYED AND THEN CLEAR THE MEMORY

3 SYMPTOM CONFIRMATION

a Symptoms exist
b No symptoms exist

4 SIMULATION TEST USING THE SYMPTOM SIMULATION METHODS

5 DTC CHECK

a DTC displayed
b No DTC displayed

6 SYMPTOM CONFIRMATION

a No symptoms exist
b Symptoms exist

If a DTC was displayed in the initial DTC check, it indicates that the trouble may have occurred in a wire harness or connector in that circuit in the past. Check the wire harness and connectors (see page 01-36 ).

TROUBLESHOOTING OF EACH PROBLEM SYMPTOM

The problem is still occurring 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, the problem symptoms must be confirmed accurately. Preconceptions should be discarded in order to give an accurate judgement. To clearly understand what the probl ...

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

More about Toyota Highlander:

Setting the vehicle speed
Press the on-off button to activate the cruise control. Cruise control indicator will come on*1 or will be displayed on the multi-information display*2. Press the button again to deactivate the cruise control. Accelerate or decelerate the vehicle to the desired speed, and ...

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