DTC 16

DTC 16 ABS Enable Relay Coil Circuit Open:

Circuit Description:
Ignition voltage is supplied through terminal "C10" of the ABS enable relay. The EBCM then is able to energize the pull-in coil by completing the ground circuit at terminal "D3" 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.

DTC Will Set When:
DTC 16 can be set only after DTC 14 has been set. This test detects an open in the AB" enable relay coil circuit. An open in this circuit will not allow the ABS enable relay to be energized thus preventing voltage/current to the motors and solenoids. If this malfunction is present and the ignition is turned "OFF" before 5 km/h (3 mph) is reached, DTC 14 is set alone.

Action Taken:
A malfunction DTC is stored, ABS is disabled and the ABS warning lamp is turned "ON."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Indicates the EBCM is capable of controlling the ABS enable relay as commanded.
2. Checks to ensure that voltage is available to the pull-in coil of the enable relay.
3. Ensures that there is continuity through the pull-in coil of the enable relay.
4. Verifies the integrity of the relay control circuit.
5. Ensures malfunction was not due to poor terminal contact.

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.

If the frequency of the malfunction is high, but is currently intermittent, check for high coil resistance by measuring between relay terminals "C1O" and "B8" using J 39200. If resistance shows greater than 1OO ohms, replace the relay.

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.