C0110
DTC C0110
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C0110 00
- Pump Motor Circuit Malfunction
DTC C0110 04
- Pump Motor Circuit Open Circuit
DTC C0110 61
- Pump Motor Actuator Stuck
Diagnostic Fault Information
Circuit/System Description
The pump motor is an integral part of the Brake Pressure Modulator, while the pump motor relay is integral to the Electronic Brake Control Module (EBCM). The pump motor relay is not engaged during normal system operation. When ABS is required the EBCM activates the pump motor relay and battery power is provided to the pump motor. The pump motor is not serviceable.
Conditions for Running the DTC
C0110 00 or C0110 04
* Initialization is complete.
* An unintentional pump motor activation is detected.
* An open/high resistance is detected on the pump motor B+ circuit.
C0110 61
* The vehicle speed is greater than 20 km/h (13 MPH), and the brake is not applied.
* The test is initiated once per ignition cycle, when the vehicle speed is greater than 8 km/h (5 MPH), and a fault was set on the last ignition cycle.
Conditions for Setting the DTC
C0110 00
* The EBCM detects the pump motor runs continuously.
* The EBCM detects an open/high resistance on the B+ circuit.
C0110 04
The EBCM detects a low voltage in the pump motor supply circuit when the feedback voltage is less than 6 V for more than 1.8 seconds, and the pump motor is not activated. The ground circuit is open, and the feedback voltage is greater than 0.93 V for 1.8 seconds, the pump is not activated.
C0110 61
The pump motor continues to rotate briefly after activation creating a feedback voltage. The EBCM sets the code if the measured feedback voltage indicates a binding or stalled pump motor.
Action Taken When the DTC Sets
* The ABS indicator turns ON.
* The red brake warning indicator turns ON.
* The hill descent indicator turns ON, if equipped with hill hold.
* The traction/stability control indicator turns ON, if equipped with electronic stability control.
* The EBCM disables the ABS, the traction and the electronic stability control for the duration of the ignition cycle.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Diagnostic Aids
Inspect the fuse, power and ground circuits for proper connections.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (MN5)
Description and Operation Reference
ABS Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
Ignition ON, perform the ABS Motor test with a scan tool. You should hear or feel the ABS pump motor turn ON and OFF.
If the pump motor does not turn ON and OFF, refer to Circuit/System Testing.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohms between the ground circuit terminal 16 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
• 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 B+ circuit fuse is open, test or replace the Brake Pressure Modulator.
4. Ignition OFF, remove the EBCM from the Brake Pressure Modulator.
5. Inspect the EBCM to Brake Pressure Modulator connector for no damage, corrosion, or presence of brake fluid.
• If connector corrosion or damage is evident, replace Brake Pressure Modulator and/or EBCM as necessary.
• If brake fluid is present, replace both Brake Pressure Modulator and EBCM.
6. If all circuits test normal, replace the Brake Pressure Modulator.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Brake Pressure Modulator Valve Assembly Replacement Brake Pressure Modulator Valve Assembly Replacement
* Control Module References Programming and Relearning for EBCM replacement, programming and setup