Toyota Corolla (E120): Circuit description

If the ignition switch is turned to the on position, battery positive voltage is applied to the switches, such as terminal ig of the ecu.

Wiring diagram

Inspection procedure

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    Radiator assy
    Replacement 1. Drain coolant 2. Separate radiator hose inlet 3. Separate radiator hose outlet 4. Separate oil cooler inlet tube no.1 5. Separate oil cooler outlet tube no.1 6. Remove radiator assy  disconnect the fan motor connector.  disconnect two clamps for wire–harness fr ...

    Inspection procedure
    1 Check door lock When the door does not operate manually, proceed to ”a”.  when the door does not operate via the key, proceed to ”b”. 2 Inspect door lock control switch W/ power window: remove the power window regulator master switch assy.  Inspect th ...

    Terminals of ecu
    1. Inspect tvip ecu Inspect the ecu–b, dome and ecu–ig fuses. disconnect the tvip ecu connector, and the continuity and voltage of check each terminal of the disconnected connector. Standard: If the result is not as specified, the vehicle’s side may malfunction. Reco ...