DTC C0201 for Chevrolet Express - AWD 2008
Diagnostic Instructions
DTC Descriptor
DTC C0201 04: Antilock Brake System (ABS) Enable Relay Contact Open Circuit
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
| • | 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 Antilock Brake System (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 the SERVICE ABS/TRACTION and the PANIC BRAKE ASSIST message. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool. |
| • | 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
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for EBCM
Circuit Verification
- Ignition ON, perform the Solenoid Tests with a scan tool and listen/feel the solenoids clicking.
- 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.
