Toyota Corolla (E120): Inspection procedure

1 Inspect stop lamp switch assy

  1. Check that the stop light lights up when brake pedal is depressed and turns off when the brake pedal is released.

2 Inspect skid control ecu terminal voltage(stp terminal)

2 Inspect skid control ecu terminal voltage(stp terminal)

  1. Disconnect skid control ecu connector.
  2. measure voltage between terminal stp (16) and gnd (1, 23) of skid control ecu harness side connector when the brake pedal is depressed.

    Voltage: 10 – 14 v

3 Check harness and connector(stop light switch – skid control

3 Check harness and connector(stop light switch – skid control ecu)

  1. Check for open and short circuit in harness and connector between stop light switch and skid control ecu

Proceed to next circuit inspection shown on problem symptoms table

Proceed to next circuit inspection shown on problem symptoms table

4 Check harness and connector(stop light circuit)

  1. Check for open and short circuit in harness and connector of the stop light circuit

Repair or replace harness or connector

Repair or replace harness or connector

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