Toyota Corolla (E120): Light control switch circuit

Wiring diagram

Inspection procedure

Inspection procedure

1 Check headlamp dimmer switch assy (light control switch)

2 Check wire harness (tvip ecu  light control switch)

2 Check wire harness (tvip ecu  light control switch)

  1. Disconnect the tvip ecu and light control switch connectors.
  2.  check the continuity between the terminals of the tvip ecu and light control switch connectors, as shown in the illustration and table.

Standard:

3 Check wire harness (light control switch  body ground)

3 Check wire harness (light control switch  body ground)

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

Standard:

Proceed to next circuit inspection shown on problem symptoms table

Proceed to next circuit inspection shown on problem symptoms table

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