For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - ABS prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
DTC Descriptor
DTC C0110 00: Pump Motor CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | C0110 00 | C0110 00 | -- | -- |
Ground | -- | C0110 00 | -- | -- |
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 is ON. |
| • | Speed is greater than 20 km/h (13 mph). |
Conditions for Setting the DTC
| • | The EBCM detects a short to ground or an open/high resistance on the B+ circuit. |
| • | The EBCM detects the pump motor runs continuously. |
| • | The EBCM detects the pump motor is binding or stalled. |
Action Taken When the DTC Sets
| • | The EBCM disables the ABS/traction control system (TCS). |
| • | The ABS indicator illuminates. |
| • | Traction off indicator illuminates. |
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. |
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 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 circuits listed below and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.
- If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets replace the EBCM.
| • | Terminal 1 |
| • | Terminal 29 |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| • | Terminal 43 |
| • | Terminal 42 |
| • | Terminal 15 |
| ⇒ | 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
