Signal Circuit Inspection
WARNING: This page is about a different variant/trim than selected.
- Ignition "OFF" and disconnect ECM connector.
- Ignition "ON" and keep the brake taking off.
- Measure voltage between Pin No. 3 (brake switch signal) terminal of brake switch harness connector and chassis ground.
- Measure voltage between Pin No. 1 (brake lamp signal) terminal of brake switch harness connector and chassis ground.
Specification:
Brake Switch - Approx 12V
Brake lamp Switch - 0V
- Keep the brake stepping on.
- Measure voltage between Pin No. 3 (brake switch signal) terminal of brake switch harness connector and chassis ground.
- Measure voltage between Pin No. 1 (brake lamp signal) terminal of brake switch harness connector and chassis ground.
Specification:
Brake Switch - 0V
Brake lamp Switch - Approx 12V
Item During taking off the brake During stepping on the brake Brake Switch 0V Battery voltage Brake lamp Switch Battery voltage 0V - Is the measured voltage within specification?
YES
- If problem still occurs, replace brake switch and then go to "SYSTEM INSPECTION " procedure.
NO
- Check the fuse between battery and stop lamp switch.
- Repair open or short in power circuit of stop lamp switch and go to "VERIFICATION OF VEHICLE REPAIR " procedure.