Toyota Corolla (E120): Door key lock and unlock switch circuit

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For vehicles equipped with mobile communication system
Install an antenna as far as possible away from the ecu and sensors of the vehicle’s electronic systems.  install an antenna feeder at least 20 cm (7.87 In.) Away from the ecu and sensors of the vehicle’s electronic systems. For details of the ecu and sensors locations, refer ...

Adjustment
1. Inspect park/neutral position switch assy  apply the parking brake and turn the ignition switch on.  depress the brake pedal and check that the engine starts only when the shift lever is set in n or p position and it does not start in the other position.  check that th ...

Fail–safe chart
If any of the following codes is recorded, the ecm enters the fail–safe mode. Check for intermittent problems Hand–held tester only: by putting the vehicle’s ecm in the check mode, the 1 trip detection logic is possible instead of the 2 trip detection logic, and the sensitivity to de ...