C0201

DTC C0201

DTC Descriptor
DTC C0201 04 Antilock Brake System (ABS) Enable Relay Contact Circuit

Diagnostic Fault Information

NOTE: Always perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure.

Circuit/System Description
The solenoid relay, located within the electronic brake control module (EBCM), supplies battery voltage to all of the valve solenoids.

Conditions for Running the DTC
^ Ignition voltage is greater than 9.5 volts.
^ The solenoid relay is commanded ON.

Conditions for Setting the DTC
One or more of the following conditions exists:
^ The EBCM detects an open in the battery positive voltage circuit to the solenoid valve relay.
^ The EBCM detects a stuck open solenoid valve relay or an open circuit between the solenoid valve relay and solenoid valves.

Action Taken When the DTC Sets
^ The EBCM disables the ABS/EBD for the duration of the ignition cycle.
^ The ABS indicator turns ON.
^ The red brake warning indicator turns ON.

Conditions for Clearing the DTC
^ The condition for setting the DTC is no longer present.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Circuit/System Verification
With the scan tool, access the ABS special functions menu and perform the ABS Motor test. The pump motor should function and no DTCs should be set.

Circuit/System Testing
Test for an open or a short to ground in the solenoid valve battery positive voltage circuit.
If battery positive voltage circuit tests normal, replace the EBCM/BPMV assembly.

Repair Instructions

NOTE: Always perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure.

[Control Module References] for EBCM replacement, setup, and programming. Programming and Relearning