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 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | C0201 | C0201 | -- | -- |
Ground | -- | C0201 | 1 | -- |
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 9.6 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, dynamic rear proportion (DRP), Traction Control ( TC), Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle. |
| • | The ABS indicator turns ON. |
| • | The red brake warning indicator turns ON. |
| • | The TC 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. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation Reference
Electrical Information Reference
Scan Tool Reference
Control Module References for EBCM
Circuit/System Testing
- Ignition OFF, disconnect the X1 harness connector at the EBCM.
- Test for less than 1.0 ohm between the ground circuit terminal 16 and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
- If all circuits test normal, replace the EBCM and verify DTC does not reset, if DTC reset replace the BPMV.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, and the fuse is open, replace the EBCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Brake Pressure Modulator Valve Replacement
Control Module References for EBCM replacement, setup, and programming
