Toyota Corolla (E120): Circuit description

The o/d main switch (transmission control switch) is a momentary type switch. When pressing the o/d main switch, the o/d off indicator light lights up and the ecm prohibits shifting into o/d, and when pressing it once again, the o/d off indicator light goes off and the ecm allows shifting into o/d. Turning the ig switch off will reset the o/d off indicator light.

Wiring diagram

Inspection procedure

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    Abbreviations used in this manual
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    Symptom simulation
    Hint: the most difficult case in troubleshooting is when no symptoms occurs. In such cases, a thorough customer problem analysis must be carried out. Then the same or similar conditions and environment in which the problem occurred in the customer’s vehicle should be simulated. No matter ho ...

    What to do if... (Troubleshooting)
    If there is a problem with the hands-free system or a Bluetooth® device, first check the table below. ► When using the hands-free system with a Bluetooth® device ► When registering/connecting a cellular phone ► When making/receiving a call ► When using the p ...