A016

Circuit Description
Ignition voltage is supplied through terminal "1" 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 ABS enable relay contacts and allows battery voltage and current to be supplied to the EBCM, which supplies power to the motors and solenoids.

Failure Condition
DTC A016 can be set only after DTC A014 has been set. This test detects an open in the ABS enable relay coil circuit. An open in this circuit will not allow the relay to be energized thus preventing voltage/current to the motors and solenoids. If this malfunction is present and the ignition switch is turned to "LOCK" before 5 km/h (3 mph) is reached, DTC A014 is set alone.

Action Taken
DTCs A014 and A016 are stored, ABS is disabled and the "ABS" indicator is turned on.

Test Description
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This step indicates if the EBCM is capable of controlling the ABS enable relay as commanded.
2. This step ensures that there is continuity through the pull-in coil of the relay.
3. This step checks to ensure that voltage is available to the pull-in coil of the relay.
4. This step checks continuity in CKT 879.
5. This step ensures DTC was not set due to a poor connection.

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 as described in "Enhanced Diagnostics."

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.