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 Descriptor
DTC C0110 00
- Pump Motor Circuit
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 ABS, the traction control or the vehicle stability control operation is required, the module activates the pump motor relay and turns the pump motor on.
Conditions for Running the DTC
* Ignition is ON.
* Initialization is complete.
Conditions for Setting the DTC
* The EBCM detects the pump motor runs continuously.
* The EBCM detects the pump motor is binding or stalled.
* The EBCM detects an open/high resistance on the ground circuit.
* The EBCM detects a short to ground or an open/high resistance on the B+ circuit.
Action Taken When the DTC Sets
* The driver information center displays a message and/or a warning indicator.
* The EBCM disables the ABS, the traction control system and the vehicle stability enhancement system for the duration of the ignition cycle.
Conditions for Clearing the DTC
* When the condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.
Note: During normal diagnostic and/or repair verification technicians may find that the ABS, Traction control and/or Stability control indicators may be ON with NO DTCs displayed by the electronic brake control module. Do not replace the electronic brake control module for this condition.
If the ABS, Traction control and/or Stability control indicators are ON with no DTCs set, perform the following steps:
1. Remove the key from the ignition, open and close the driver's door to turn off retained accessory power, and wait 60 seconds.
2. Ignition ON, if the ABS, Traction Control and/or Stability control indicators are still illuminated, operate the vehicle at speeds greater than 16 km/h (10 MPH) to complete the self test. The electronic brake control module should request all indicators to turn OFF.
3. If indicators remain ON with no DTCs set after the drive cycle, disconnect the battery for at least 60 seconds then reconnect the battery.
4. Operate the vehicle at speeds greater than 40 km/h (25 MPH), the electronic brake control module should request all the indicators to turn OFF.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Folding Top 5 Bow Lowered Switch (CM7)
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 Verification
Ignition ON, perform the Pump Motor Test with a scan tool and listen or feel the pump motor turn ON and OFF.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the electronic brake control module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the ground circuits listed below and ground.
* Terminal 13
* Terminal 38
• 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 1 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 electronic brake control module.
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