C0066

DTC C0066 Circuit Diagram:

CIRCUIT DESCRIPTION
The relay supplies power to the pump motor when Antilock Brake System (ABS) is required. The relay is located within the Electronic Brake Control Module (EBCM).

CONDITIONS FOR SETTING DTC
- ABS bulb check complete
- High voltage on pump motor driver circuit when all are expected to be low (relay not commanded on)

ACTION TAKEN WHEN DTC IS SET
- ANTILOCK indicator lamp is illuminated
- ABS is disabled

NOTE: This DTC is an Ignition Latched DTC which indicates the above is true until the ignition is turned to OFF (even if the cause of the DTC is intermittent).

DIAGNOSTIC AIDS
DTC C0066 is usually set by the relay contacts stuck closed. The relay is located within the EBCM and is not serviceable. If the test does not repair the DTC, the EBCM must be replaced.


NOTE: If DTC C0066 appears with other DTCs, first repair the other DTCs, clear DTCs, and run three function tests with the scan tool. If DTC C0066 resets, refer to this diagnostic chart.

DTC CHART TEST DESCRIPTION

DTC C0066 Diagnostic Chart:

NOTE: Number(s) below refer to number(s) on the diagnostic chart.

2. Inspect the EBCM 2-way harness connector for damage.
3. Check the ground circuits to the EBCM.
4. Check the power circuits to the EBCM.