Toyota Corolla (E120): Circuit description

The door courtesy switch turns on when the door is opened and off when the door is closed.

Wiring diagram

Inspection procedure

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    Circuit description
    A thermistor is built in the engine coolant temperature sensor and changes the resistance value according to the engine coolant temperature. The structure of the sensor and connection to the ecm is the same as those of the intake air temperature sensor. Hint: if the ecm detects the dtc ...

    Inspection procedure
    1 Check p/t squib(lh) circuit(airbag sensor assy center – front seat outer belt assy lh) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors between the airbag sensor assy center and the seat belt pretensio ...

    Replacement
    Hint: installation is according to the reverse order of the removal. 1. Remove rear door weatherstrip rh 2. Remove rear door weatherstrip lh 3. Remove rear seat cushion assy (, 72–8) 4. Remove rear seat back assy (fixed type rear seat) 5. Remove separate type rear seat back assy (separate ...