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 Circuit 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 (EBCM). The pump motor relay is not engaged during normal system operation. When the ABS, traction control or stability control operation is required, the EBCM activates the pump motor relay and turns the pump motor ON.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C0110 00
* An unintentional pump motor activation is detected for 1.785 s.
* An open/high resistance is detected on the pump motor B+ circuit for 1.8 s.

C0110 04

An unintentional pump motor activation is detected for 1.785 s.

C0110 61
* A short to ground or an open/high resistance is detected on the pump motor B+ circuit for 1.8 s.
* A faulty pump motor is detected.

Action Taken When the DTC Sets

* The EBCM disables the ABS, traction control and stability control for the duration of the ignition cycle.
* The ABS indicator turns ON.
* The traction control/stability control-active indicator turns ON.
* The brake warning indicator turns ON.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicators in the next ignition cycle.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
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 (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module (EBCM).
2. Test for less than 1 ohm between the ground circuit terminal 16 and ground.

• If greater than the specified value, test the ground circuit for an open/high resistance.

3. 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.

4. Ignition OFF, remove the K17 Electronic Brake Control Module (EBCM) from the Q5 brake pressure modulator valve assembly.
5. Inspect the K17 Electronic Brake Control Module (EBCM) to Q5 brake pressure modulator valve assembly connector for damage, corrosion, or presence of brake fluid.

• If connector corrosion or damage is diagnosed, replace the Q5 brake pressure modulator valve assembly and/or K17 Electronic Brake Control Module (EBCM) as necessary.
• If brake fluid is present, replace theQ5 brake pressure modulator valve assembly and the K17 Electronic Brake Control Module (EBCM).

6. Connect the K17 Electronic Brake Control Module (EBCM) harness connector with the Q5 brake pressure modulator valve assembly still separated.
7. Connect a test lamp between the pump motor circuits terminals.
8. Ignition ON, command the ABS Pump Motor Increase and Decrease with a scan tool, verify the test lamp illuminates when commanded.

• If test lamp does not illuminate, replace the K17 Electronic Brake Control Module (EBCM).

9. If all circuits test normal, replace the Q5 brake pressure modulator valve assembly and verify the DTC does not reset.

• If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Brake Pressure Modulator Valve Replacement (Brake Pressure Modulator Valve Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, programming and setup