Toyota Corolla (E120): Inspection procedure

1 Check security indicator light

  1. Remove the security indicator.
  2.  check the indicator light, as shown in the illustration and table.

Standard:

2 Check wire harness (tvip ecu  security indicator)

2 Check wire harness (tvip ecu  security indicator)

  1. Disconnect the tvip ecu and security indicator connectors.
  2.  check the continuity between the terminals of the tvip ecu connector and security indicator connector, as shown in the illustration and table.

Standard:

3 Check wire harness (security indicator  body ground)

3 Check wire harness (security indicator  body ground)

  1. Disconnect the security indicator connector.
  2.  check the continuity between the terminal of the security indicator connector and body ground, as shown in the illustration and table.

Standard:

Check and replace tvip ecu

Check and replace tvip ecu

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    Monitor description
    The battery supplies electricity to the ecm even when the ignition switch is off. This electricity allows the ecm store data such as dtc history, freeze frame data, fuel trim values, and other data. If the battery voltage falls below a minimum level, the ecm will conclude that there is a fault ...

    Replacement
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    Checking the engine coolant
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