Antilock Brake System - Non-Hybrid Greater than/Equal to 3900 kg (8600 lb) GVW (With JL4)
DTC C0110 (With JL4)
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 03
-
Pump Motor Circuit Voltage Below Threshold
DTC C0110 04
-
Pump Motor Circuit Open Circuit
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, 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 operation is required the EBCM activates the pump motor relay and turns the pump motor ON.
Conditions for Running the DTC
C0110 03 or C0110 61
* Ignition ON.
* The system enable relay is ON.
* The pump motor has been commanded ON, OFF and ON again.
C0110 04
* System and ignition voltage is above 10.5 volts.
* The system enable relay is ON.
* The pump motor has been commanded OFF for 2.5 seconds.
Conditions for Setting the DTC
C0110 03 or 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.
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 milliseconds.
Action Taken When the DTC Sets
* The EBCM disables the ABS, traction control system and the vehicle stability enhancement system for the duration of the ignition cycle.
* The ABS indicator turns ON.
* The Traction Control indicator turns ON.
* The driver information center displays the Service Stability System message.
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 100 consecutive drive cycles.
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 (M30)
Description and Operation
ABS Description and Operation (Without JL4) Description and OperationABS Description and Operation (With JL4) 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 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 circuits listed below and ground:
* Terminal 1
* Terminal 25
• 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. If the circuit tests normal and the B+ circuit fuse is open, replace the brake pressure modulator valve.
4. If all circuits test normal, replace the brake pressure modulator valve 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 (Without JL4) Brake Pressure Modulator Valve Replacement (Without JL4)Brake Pressure Modulator Valve Replacement (With JL4) Brake Pressure Modulator Valve Replacement (With JL4)
* Control Module References Control Module References for EBCM replacement, programming and setup