Antilock Braking System (ABS)

Diagnostic Chart:

Circuit Diagram:

REAR MOTOR CIRCUIT GROUNDED
The ABS control module detects a fault in any of the motor circuits by monitoring a bias voltage. If a motor circuit is open, grounded, or shorted to battery, ABS will be disabled and the antilock and brake telltale will be turned On.

CODE PARAMETERS

Code 65 sets if:
^ Rear motor circuit is grounded.
^ This code can set at all times except when a previous failure has disabled ABS operation.
^ The brake telltale will only light if the rear ABS motor is not in home position.

DIAGNOSTIC AIDS
When attempting to diagnose an intermittent problem, use the Scan tool[1] to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.


Check the tightness of the female terminal grip with a spare male terminal.

Motor resistance is less than 2 ohms.

Motor runs in both direction.

[1] Select Malfunction History from Scan tool ABS menu.