Diagnostics
Inspection procedure
In this manual: Diagnostics
2steps
~12min
1/5difficulty
Done 0 of 2
1 Inspect stop lamp switch assy


2 Inspect skid control ecu terminal voltage(stp terminal)



Proceed to next circuit inspection shown on problem symptoms table 4 Check harness and connector(stop light circuit)


Repair or replace harness or connector
- Check that the stop light lights up when brake pedal is depressed and turns off when the brake pedal is released.



- Disconnect skid control ecu connector.
- 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


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


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


Test yourself
A quick Toyota Corolla quiz: every answer comes with an explanation and a link to the manual page.
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