A014

Code A014

Enable Relay Contacts or Fuse Open









Circuit Description

Ignition voltage is supplied through terminal A2 of the ABS enable relay. The EBCM then is able to energize the pull in coil by completing the ground circuit at Pin "22" of the EBCM. The magnetic field created closes the enable relay contacts and allows battery voltage and current to be supplied to the EBCM, which supplies power to the motors and solenoids.

This code monitors the availability of current/voltage to the motors and solenoids. This fault indicates voltage is not available and would therefore not allow ABS operation if required.

Test Description

Test Description: Number(s) below refer to circled number(s) on the diagnostic chart.

1. This step would indicate that the EBCM is sensing battery voltage present through the relay contacts at terminal "A". This shows that the relay and circuitry is functional.
2. This insures that battery voltage is available to terminals "A2" and "A3" of the relay.
3. This step checks to make sure that the pull-in coil of the enable relay has continuity.
4. This checks the ability of the EBCM to energize the enable relay. An open circuit in the EBCM or CKT 879 would not allow the enable relay to be energized.
5. This step checks for an open CKT 850 between the enable relay and EBCM.

Diagnostic Aids

An "Intermittent" problem may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

The frequency of the problem can be checked by using the enhanced diagnostic function of the "Scan" tool.

If the frequency of the failure was low, repair any other codes first and then clear codes. After clearing codes, turn the ignition "ON" for 5 seconds, and then "OFF" for 5 seconds. Repeat this procedure 10 times. If the ABS light went "OFF" each time after 3 seconds, and when reading codes, Code A014 still exists, the Code A014 is being caused by vehicle transient voltage, and should be ignored.

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.

Vibration, Temperature Effects

Check for vibration effects by performing the relay test function of the "Scan" tool. With the relay test commanded "ON," lightly tap the top and sides of the relay while monitoring relay voltage. If the relay voltage changes significantly, replace the relay.

If Code A014 only fails when the vehicle is initially started in cold ambient conditions (temperature less than 32°F ((0°C)), replace the relay.