For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic Starting Point - Antilock Brake System prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
DTC Descriptor
DTC C0110: Pump Motor CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | DTC C0110 | DTC C0110 | -- | -- |
Ground | -- | DTC C0110 | -- | -- |
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 antilock brake system (ABS) or traction control system (TCS) operation is required the EBCM activates the pump motor relay to run the pump motor.
Conditions for Running the DTC
| • | Ignition ON. |
| • | Initialization is complete. |
Conditions for Setting the DTC
| • | A short to ground or open/high resistance on the B+ circuit. |
| • | An open/high resistance on the ground circuit. |
| • | A continuously running pump motor. |
Action Taken When the DTC Sets
| • | The EBCM disables the antilock brake system (ABS)/traction control system (TCS) 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 100 consecutive drive cycles. |
| • | ECE 13, the ABS indicator will remain on until a vehicle speed of 13 km/h (8 mph) or greater is achieved. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Antilock Brake System Connector End Views
Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Ignition ON, perform the Pump Motor Test with a scan tool and listen/feel the Pump Motor turn ON and OFF.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Test for less than 1 ohm between the ground circuit listed below and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit listed below and ground.
- If all circuits test normal, replace the EBCM and verify DTC does not reset. If the DTC resets replace the BPMV.
| • | Terminal E (JL4) |
| • | Terminal C (JL4) |
| • | Terminal A (w/o JL4) |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| • | Terminal F (JL4) |
| • | Terminal B (w/o JL4) |
| ⇒ | 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. |
Repair Instructions
