Diagnostic Instructions
DTC Descriptors
DTC C0110 04: Pump Motor Circuit Open Circuit
DTC C0110 61: Pump Motor Circuit Actuator Stuck
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
B+
| C0110 61
| C0110 61
| C0110 04
| C0110 04, C0110 61
|
Ground
| --
| C0110 61
| --
| --
|
Circuit/System Description
The electronic brake control module (EBCM) supplies ground to activate the ABS pump motor. An internal system relay in the EBCM supplies battery positive voltage to the pump motor when the ignition is turned ON. The EBCM monitors pump motor feedback voltage
after activation to detect a stalled or binding pump motor.
Conditions for Running the DTC
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. |
C0110 61
| • | The system enable relay is ON. |
Conditions for Setting the DTC
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 a binding or stalled pump motor.
Action Taken When the DTC Sets
| • | The EBCM disables the ABS/traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
| • | The ABS indicator illuminates. |
| • | The Traction Control indicator illuminates. |
| • | The driver information center (DIC) displays Service Stability System. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
| • | The pump motor may be mechanically stuck. |
| • | The pump motor is integral to the brake pressure modulator valve (BPMV). The pump motor is not serviceable. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Test for less than 1 ohm between the ground circuits listed below and ground.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
- Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below 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 BPMV. |
- 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 after completing the diagnostic procedure.
