Antilock Braking System (ABS)

Code 17: ABS Relay Coil Circuit Shorted To Ground.:

DTC 17 ABS Relay Coil Circuit Shorted To GND:

Circuit Description:
Ignition voltage is supplied through terminal "C2" of the ABS relay. The EBCM then is able to energize the pull-in coil by completing the ground circuit at connector "C1", terminal "A11" of the EBCM. The magnetic field created closes the ABS relay contacts and allows battery voltage and current to be supplied to the EBCM, which supplies power to the motors and solenoids.

DTC Will Set When:
DTC 17 can be set before the EBCM commands the ABS relay "ON." This test determines if the ABS relay is energized when it should not be. This malfunction would not allow the ABS relay to remove power to the EBCM. If a second malfunction were to occur that requires the ABS relay to be turned "OFF," that malfunction cannot be removed if the relay cannot be controlled.

Action Taken:
A malfunction DTC is stored. ABS is not disabled.

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Indicates that the EBCM is capable of controlling the ABS relay as commanded.
2. Checks to ensure that the ABS relay or control CKT 1632 are not shorted to ground.
3. Checks to see if the EBCM is internally shorted to ground. A grounded terminal "A11" would cause the ABS relay to be energized any time the ignition is in the "RUN" position.
4. Checks for a short to ground in control CKT 1632 or a defective relay.

Diagnostic Aids:
An intermittent malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

The frequency of the malfunction can be checked by using the enhanced diagnostic function of the Tech 1.

Any circuitry, that is suspected of causing the intermittent complaint, should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness.