Anti-Lock Brake Signal

Anti-lock Brake Signal Circuit:

PURPOSE
The anti-lock brake signal is provided to control idle speed and increase braking effect.

OPERATION
The engine ECM provides the ABS control unit with a 5 Volt reference signal. The engine ECM monitors this signal. When the ABS control unit determines that brake control is needed, the ABS control unit completes the ground circuit from the engine ECM. When this voltage drop is detected by the engine ECM, the ECM operates the idle speed control servo to provide effective anti-lock braking.