C0253 - ABS
Antilock Brake System
Diagnostic Information and Procedures
DTC C0246-C0254
Circuit Description
The ABS relay supplies battery voltage to six valve solenoids. The EBCM microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.
Conditions for Running the DTC
- The ignition is ON.
- The vehicle speed is greater than 6 km/h (4 mph).
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
C0246, C0251, C0252, C0253 and C0254
If equipped, the following actions occur:
- The EBCM disables the DRP/ABS.
- The ABS indicator turns ON.
- The red brake warning indicator turns ON.
C0247 and C0248
If equipped, the following actions occur:
- The EBCM disables the ABS.
- The ABS 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 DTC's function.
Diagnostic Aids
An intermittent open/shorted solenoid DTC can be set by several different internal EBCM problems. Replace the EBCM if an open/shorted solenoid DTC continues to set intermittently.
