Chevrolet Silverado / GMC Sierra. Manual - part 714
simultaneously control the traction control. The EBCM sends a serial data message to the ECM
requesting torque reduction. When certain ECM DTCs are set, the ECM will not be able to
perform the torque reduction for traction control. A serial data message is sent to the EBCM
indicating that traction control is not allowed.
Conditions for Running the DTC
The ignition is ON.
Ignition voltage is greater than 8 volts.
Conditions for Setting the DTC
The ECM diagnoses a condition preventing the engine control portion of the traction control
function and sends a serial data message to the EBCM indicating that torque reduction is not
allowed. The ECM will typically set a DTC and the EBCM will set this DTC.
Action Taken When the DTC Sets
The EBCM disables the TCS for the duration of the ignition cycle.
The Traction Off indicator turns ON.
The DIC displays the Service Traction Control message.
The ABS remains functional.
Conditions for Clearing the DTC
The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The electronic brake control module (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
Component Connector End Views
Description and Operation
ABS Description and Operation (With JL4) or ABS Description and Operation (Without
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
JL4)
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Verify that no DTCs are set in the ECM.
If DTCs are set, refer to Symptoms - Engine Controls .
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References
DTC C0245
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 C0245 00
Wheel Speed Sensor Frequency Error
DTC C0245 5A
Wheel Speed Sensor Plausibility Failure
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Diagnostic Fault Information
Circuit/System Description
The wheel speed sensor receives a 12-volt power supply voltage from the electronic brake
control module (EBCM) and provides an output signal to the EBCM. As the wheel spins, the
wheel speed sensor sends the EBCM a DC square wave signal. The EBCM uses the frequency of
the square wave signal to calculate the wheel speed.
Conditions for Running the DTC
The ignition is ON.
Ignition voltage is greater than 9.5 volts.
No wheel speed sensor faults exist.
Brake is not applied.
Vehicle is not cornering.
No wheel spinning is detected.
Conditions for Setting the DTC
Wheel speed differences between one wheel and the others is greater than 25 percent.
Action Taken When the DTC Sets
Antilock Brake System (ABS), Traction Control System (TCS) and Vehicle Stability
Enhancement System (VSES) are disabled for the remainder of the ignition cycle.
The ABS and Stabilitrak indicator turns ON.
The service Traction Control and Stabilitrak displays on the DIC.
Conditions for Clearing the DTC
The DTC becomes history when the conditions for setting the DTC are no longer present.
The history DTC clears after 100 malfunction-free ignition cycles.
The EBCM receives a clear code command from the scan tool.
Diagnostic Aids
Circuit
Short to
Ground
Open/High
Resistance
Short to
Voltage
Signal
Performance
Wheel Speed Sensor Frequency
Error
-
-
-
C0245 00, 5A
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Faulty wheel speed sensor will not set this DTC.
A vehicle using a space saver spare will not set this code.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Inspect for one tire that has improper air pressure or improper size.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
DTC C0252
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado