Equal to or over 8600 GVW
DTC C0201 (Equal to or over 8600 GVW)
Circuit Description
The system relay, located within the electronic brake control module (EBCM), supplies battery voltage to all of the valve solenoids and to the ABS pump motor. When the relay contacts close, the EBCM monitors the voltage supplied to the valve solenoids and compares this voltage to monitored ignition voltage.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0201 Antilock Brake System (ABS) Enable Relay Contact Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects that the voltage supplied to the valve solenoids is less than 80 percent of monitored ignition voltage for 50 milliseconds.
Action Taken When the DTC Sets
^ The EBCM disables the ABS/DRP.
^ The ABS indicator turns ON.
^ The brake warning indicator turns ON.
Conditions for Clearing the DTC
The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Refer back to the diagnostic table, steps 3-7, if this DTC continues to set intermittently.
Test Description
The number below refers to the step number on the diagnostic table.
3. A shorted ABS pump motor may damage the contacts within the system relay. It is imperative that the steps in the table be followed to prevent damage to a replacement EBCM.
