Anti-Lock Braking Signal

ANTI-LOCK BRAKING SIGNAL







OPERATION
- The anti-lock braking signal is input to the engine control module from the anti-lock braking system (ABS) control module as a signal to indicate whether or not the motor relay is activated. Based on this signal, the engine control module controls the idle air control motor to secure effective anti-lock braking.
- When the motor relay is activated, the ABS control unit turns ON the power transistor, short-circuiting the terminal to ground. This causes the anti-lock braking signal to go from high to low.

HARNESS INSPECTION




Check for an open-circuit or a short-circuit to ground, between the ABS control unit and the engine control module.
- ABS control unit connector: Disconnected
- Engine control module connector: Disconnected
OK: STOP
NG: Repair the harness. (A28 - 66)