C0110

DTC C0110

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using the 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 Descriptor
DTC C0110
- Pump Motor Circuit

Circuit/System Description

The pump motor is an integral part of the brake pressure modulator valve, while the pump motor relay is integral to the EBCM. The pump motor relay is not engaged during normal system operation. When Antilock Brake System operation is required the EBCM activates the pump motor relay and battery power is provided to the pump motor.

Conditions for Running the DTC

* The ignition switch is in the ON position.
* Initialization is complete.

Conditions for Setting the DTC

* Pump motor voltage is not present 100 milliseconds after activation of the pump motor relay.
* Pump motor voltage is present more than 1 second with no activation of the pump motor relay within 5 seconds.

Action Taken When the DTC Sets

* The EBCM disables the ABS for the duration of the ignition cycle.
* The ABS indicator illuminates.

Conditions for Clearing the DTC

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 (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)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
* Connector Repairs (Connector Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Verification

Ignition ON, command the Pump Motor Test ON and OFF with a scan tool, the pump motor should turn ON and OFF while changing between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 5 ohm between the ground circuits listed below and ground:

* Terminal 13
* Terminal 26

• 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+ circuits listed below and ground:

* Terminal 1
* Terminal 14

• 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, replace the brake pressure modulator valve and EBCM assembly.

4. If all circuits test normal, replace the brake pressure modulator and EBCM assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the repair.

Control Module References (Programming and Relearning)for brake pressure modulator valve and EBCM replacement, programming and setup