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

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Circuit description
The throttle position sensor is mounted in the throttle body and detects the throttle valve opening angle. When the throttle valve is fully closed, a voltage of approximately 0.3 To 1.0 V is applied to terminal vta of the ecm. The voltage applied to terminal vta of the ecm increases in pro ...

Power door lock control system
Symptom Suspected area All doors are not operated by driver’s door key cylinder interlocked with key Door lock control switch Front door lock assy lh  Wire harness Integration relay Key confinement prevention function does ...

How to proceed with troubleshooting
Hint: carry out troubleshooting in accordance with the procedures on the following page. Here, only the basic procedures are shown. Details are provided in the diagnostics section, showing the most effective methods for each circuit. Confirm the troubleshooting procedures first for the releva ...