Toyota Corolla Repair Manual: Inspection procedure

1 Check hazard warning signal switch assy

1. Check the hazard warning switch continuity, as shown in the illustration and table.

Standard:

2 Check turn signal flasher assy

3 Check wire harness (tvip ecu turn signal flasher)

1. Disconnect the tvip ecu and turn signal flasher connectors.
2. check the continuity between the terminals of the tvip ecu and turn signal flasher connectors, as shown in the illustration and table.

Standard:

4 Check wire harness (hazard warning switch  body ground)

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

Standard:

Check and replace tvip ecu