Toyota Corolla (E120): Inspection procedure

1 Check ignition or starter switch assy

  1. Check the ignition switch, as shown in the illustration and table.

Standard:

2 Check fuse (ecu–b)

2 Check fuse (ecu–b)

  1. Remove the fuse from the instrument panel j/b.
  2.  check the continuity of the fuse.

Standard: continuity

3 Check relay (marking: ig1)

3 Check relay (marking: ig1)

  1. Remove the relay from the instrument j/b.
  2.  inspect the relay continuity, as shown in the illustration and table.

Standard:

4 Check tvip ecu

4 Check tvip ecu

  1. Disconnect the tvip ecu connector.
  2.  turn the ignition switch on.
  3.  measure the voltage between the terminal of the ecu connector and the body ground, as shown in the illustration and table.

Standard:

Check and replace tvip ecu

Check and replace tvip ecu

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    Other materials:

    Exterior/interior trim
    Preparation Recomended tools Equipment Vehicle control system Preparation Recomended tools ...

    Inspection procedure
    1 Inspect ecm(+b voltage) Turn the ignition switch on.  measure the voltage between the terminals of the e4 and e6 ecm connectors. Standard: 2 Check harness and connector(ecm – body ground) Disconnect the e4 ecm connector. check the resistance between the wire ...

    Circuit description
    The ignition switch provides circuit power and the ecm provides the circuit ground that illuminates the mil. Mil operation is checked visually: it should be illuminated when the ignition is first turned on. If the mil is off all of the time or on all of the time, use the procedure below to ...