C0066

DTC C0066 Pump Motor Relay Circuit Shorted:

Pump Motor Relay Circuit Schematic:

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

CONDITIONS FOR SETTING THE 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 THE DTC SETS
^ 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. Diagnostic Aids 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.

TEST DESCRIPTION
The numbers below refer to the numbers 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.