Antilock Braking System (ABS)

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

DTC 17 ABS Relay Coil Circuit Shorted To Ground:

Circuit Description:
Ignition voltage is supplied to terminal "86" of the ABS relay. The EBCM/EBTCM is then able to energize the pull-in coil by completing the ground circuit at terminal "2" of the EBCM/EBTCM. The magnetic field created closes the ABS relay contacts and allows battery voltage and current to be supplied to the EBCM/EBTCM, which supplies power to the motors and solenoids.

DTC Will Set When:
DTC 17 can be set before the EBCM/EBTCM 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 ABS system. If a second malfunction were to occur that requires the ABS relay to be turned "OFF," that malfunction can not be removed if the relay can not be controlled.

Action Taken:
A malfunction DTC is stored. ABS is not disabled and the ABS indicator lamp will remain "OFF."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Indicates if the EBCM/EBTCM is capable of controlling the ABS relay as commanded.
2. Ensures the ABS relay or control circuit are not shorted to ground.
3. This step isolates the malfunction to either the ABS relay or the ABS relay control circuit.
4. Ensures short to ground is not due to physical damage of the circuitry.
5. Identifies whether the malfunction is due to a poor connection in the Dash to Engine connector.

Diagnostic Aids:
An intermittent" malfunction is most likely 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 as 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.