Brake Light Switch
| Brake Light Switch |
The control module receives voltage on pin 30 from the brake light switch when the brake pedal is depressed.
The control module uses information on brake light switch status (ON/OFF):
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If the brake pedal is released and then re-pressed while the ABS is operative, the control module restarts from the start of the control cycle.
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Brake light ON is one of 4 criteria for the control module to activate EBD modulation.
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A pump motor test is normally performed at 6 km/h (3.7 mph). If the brake light is ON, the test is performed at 15 km/h (9.3 mph).
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If the brake pedal is depressed during TCS modulation (brake light ON), the ESP control module disengages the TCS function for braking and select braking. Other TCS control functions remain active.
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Diagnostic help
The control module monitors the circuit by feeding a low current on pin 30 which is grounded by the brake pedal lamps.This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
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