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
DTC C0110 61
- Pump Motor Stuck
Diagnostic Fault Information
Circuit/System Description
The pump motor is an integral part of the brake pressure modulator valve assembly, while the pump motor relay is integral to the electronic brake control module. The pump motor relay is not engaged during normal system operation. When the antilock brake system, traction control or stability control operation is required, the electronic brake control module activates the pump motor relay and turns the pump motor ON.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
* A faulty pump motor or pump motor relay is detected.
* An open/high resistance is detected on the pump motor ground circuit.
* A short to ground or an open/high resistance circuit is detected. on the pump motor B+ circuit.
Action Taken When the DTC Sets
* The ABS indicator turns ON.
* The traction/stability control indicator turns ON, if equipped with electronic stability control.
* The electronic brake control module disables the antilock brake system, the traction control and the electronic stability control for the duration of the ignition cycle.
Conditions for Clearing the DTC
* A current DTC clears when the diagnostic runs and passes.
* The electronic brake control module will turn off the indicators and enable the system functions in the next ignition cycle after driving at a speed of greater than 15 km/h (9 MPH).
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Sunshade - Left (D6I)
Description and Operation
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the antilock brake system pump motor turns ON and OFF when commanding the ABS Pump Motor Increase and Decrease with a scan tool.
• If the pump motor does not turn ON and OFF
Refer to Circuit/System Testing.
• If the pump motor turns ON and OFF
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K17 electronic brake control module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohm between the ground circuit terminal 13 and ground.
• If 10 ohm or greater
* Ignition OFF.
* Test for less than 2 ohm in the circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, repair the open/high resistance in the ground connection.
3. Ignition ON.
4. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 ohm in the B+ circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF.
2. Test for infinite resistance between the B+ circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Q5 brake pressure modulator.
• If the test lamp illuminates
5. Replace the Q5 brake pressure modulator.
6. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
• If the DTC sets
Replace the K17 electronic brake control module.
• If the DTC does not set
7. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Brake Pressure Modulator Valve Replacement Brake Pressure Modulator Valve Replacement
* Control Module References Control Module References for electronic brake control module replacement, programming and setup