Toyota Corolla (E120): Circuit description

This is the power source of the ecu, hence the actuators.

Wiring diagram

Wiring diagram

Inspection procedure

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    On–vehicle inspection
    1. Inspection throttle body idle speed control valve assy Notice: it is impossible to check the resister value and the operation of isc valve by itself, because the isc valve has an ic circuit inside it, which transforms the duty signal from the ecm to the derive signal. After check ...

    Front suspension arm sub–assy lower no.1 Lh
    Replacement Hint: components: 1. Remove front wheel 2. Disconnect front stabilizer link assy lh (lh (a/t) position) 3. Disconnect front stabilizer link assy rh (lh (a/t) position) Hint: remove the rh side by the same procedures as the lh side. 4. Separate front suspension arm sub–assy lowe ...

    Inspection
    1. Inspect front seat inner belt assy lh When fastening the seat belt (buckle switch on).  Inspect the continuity and resistance between the terminals. Standard: If the result is not as specified, replace the inner belt. When releasing the seat belt (buckle switch ...