Toyota Corolla (E120): Circuit description

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Hint

: there is a case that hand–held tester cannot be used when ecu is abnormal.

Wiring diagram

Inspection procedure

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    Diagnostic trouble code chart
    Terms Terms Physical address Three–digit code (shown in hexadecimal) which is given to each component comprising the avc–lan. Corresponding to the function, individual symbols are specified. Logical address Two–digit code (shown in hexadeci ...

    Circuit description
    The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...

    If your vehicle needs to be towed
    If towing is necessary, we recommend having your vehicle towed by your Toyota dealer or commercial towing service, using a wheel-lift type truck or flatbed truck. Use a safety chain system for all towing, and abide by all state/provincial and local laws. WARNING Observe the following precautions. ...