Diagnostic Instructions
- Perform the
Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review
Strategy Based Diagnosis for an overview of the diagnostic approach.
-
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C0110 61: Pump Motor Circuit Actuator Stuck
DTC C12E8: Pump Motor Circuit Actuator Stuck
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
| • | Ignition voltage is greater than 10 volts. |
| • | The system enable relay is ON. |
| • | The pump motor has been commanded ON, OFF and ON again. |
Conditions for Setting the DTC
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. |
| • | A DIC message and/or a warning indicator may be displayed. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | 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
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+ 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 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.
