Toyota Corolla (E120): Problem symptoms table

If a normal code is displayed during the dtc check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

Notice

: when replacing skid control ecu, sensor or etc., Turn the ignition switch to off.

Right/Left front speed sensor circuit

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    Inspection procedure
    1 Check courtesy lamp switch Check the courtesy switch, as shown in the illustration and table. Standard: 2 Check wire harness (integration relay  door courtesy sw) Disconnect the integration relay and door courtesy connectors.  check the continuity between th ...

    Circuit description
    The airbag front rh sensor circuit consists of the airbag sensor assy center and airbag front rh sensor. Dtc b1156/b1157/15 is recorded when a malfunction is detected in the airbag front rh sensor circuit. Wiring diagram ...

    Overhaul
    1. Precaution 2. Disconnect battery negative terminal 3. Inspect place front wheels facing straight ahead 4. Remove horn button assy Notice: if the airbag connector is disconnected with the ignition switch being at on, dtcs will be recorded.  using a torx socket wrench, loosen the ...