C0110

DTC C0110

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptors
DTC C0110 04
- Pump Motor Circuit Open Circuit

DTC C0110 03
- Pump Motor Circuit Voltage Below Threshold

DTC C0110 61
- Pump Motor Circuit Actuator Stuck

Diagnostic Fault Information





Circuit/System Description

The pump motor is an integral part of the brake pressure modulator valve (BPMV), 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 antilock brake system (ABS) or traction control system (TCS) operation is required the EBCM activates the pump motor relay and turns the pump motor ON.

Conditions for Running the DTC

C0010 03
* Ignition ON.
* System and ignition voltage is above 9 volts.
* The system enable relay is ON.

C0010 04
* Ignition ON.
* System and ignition voltage is above 9 volts.
* The system enable relay is ON.
* The pump motor has been commanded OFF for 2 seconds.

C0010 61
* Ignition ON.
* The system enable relay is ON.
* The pump motor has been commanded ON, OFF and ON again.

Conditions for Setting the DTC

C0110 03

The EBCM detects an open in the pump motor driver or supply when when the motor is supposed to be turned on and if the motor feedback is below 50% of the system voltage for 10 ms,

C0110 04

The EBCM detects an open in the pump motor circuit when the feedback voltage remains greater than 0.75 volt for more than 50 msec.

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 an open circuit, binding or stalled pump motor.

Actions Taken when the DTC Sets

* The EBCM disables the antilock brake system (ABS), traction control and StabiliTrak for the duration of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* Operate the vehicle at speeds greater than 15 km/h (10 mph) to complete the self test, and the EBCM will turn off the ABS indicator.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics (JL7) (Antilock Brake System Schematics (With RPO JL7))Antilock Brake System Schematics (Except JL7) (Antilock Brake System Schematics (Except RPO JL7))
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

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 EBCM.
2. Test for less than 5 ohms between the ground circuits listed below and ground.

* Terminal 25
* Terminal 1

• 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 13 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets replace the EBCM.

Repair Instructions

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

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