For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC C0201 00: Antilock Brake System (ABS) Enable Relay Contact CircuitCircuit/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
| • | 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/traction control system (TCS)/dynamic rear proportion (DRP)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
| • | The ABS indicator illuminates. |
| • | The Traction Control indicator illuminates. |
| • | The driver information center (DIC) displays SERVICE BRAKE ASSIST, and SERVICE TRACTION CONTROL. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit Verification
Verify that DTC C0201 is not set.
| ⇒ | If DTC is set, replace the EBCM and verify DTC does not reset. If DTC resets replace the BPMV. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
