Enhanced Testing

C1161 - Brake Light Switch Failure






General Description
The brake light switch indicates brake pedal status to the ABS control unit. The switch is turned on when brake is applied. The brake light switch is a normally-open contact which runs to battery voltage when active (brake operated). When passive (brake not operated), the cable is grounded via the break light bulbs. The brake light switch is not monitored if the valve relay drops out, or in the event of low voltage or overvoltage.

DTC Description
The brake light signal is a reference to judge driver's will for braking. ABS ECU monitor open circuit of brake light switch for normal ABS control.


Detecting Condition





Wiring Schematic