DTC C0110 Under 8600 GVW
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 Descriptor
DTC C0110 00: Pump Motor CircuitCircuit/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 and ground circuit is provided to the pump motor.
Conditions for Running the DTC
| • | The ignition switch is in the ON position. |
| • | Initialization is complete. |
Conditions for Setting the DTC
| • | The EBCM motor drive circuit detects a short to battery positive, or open ground circuit, and a continuously on or off motor. |
| • | 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/TCS/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle. |
| • | The ABS indicator turns ON. |
| • | The Traction Control and VSES indicators turn ON. |
| • | The Traction Control and Stabilitrack displayed on the DIC. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
| • | An ECE 13 response may be required, after repairs are made, and DTCs are cleared, operate the vehicle at speeds greater than 13 km/h (8 mph) to complete the self test, and the EBCM will turn off the ABS indicator . Refer to ABS Description and Operation for a complete description of ECE 13. |
Diagnostic Aids
The pump motor is integral to the BPMV. The pump motor is not serviceable. Inspect the power and ground circuits proper connections.
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
Scan Tool Data List for EBCM
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Test for less than 1.0 ohm of resistance from ground circuit terminal 38 and ground.
- Test for less than 1.0 ohm of resistance from ground circuit terminal 13 and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- Verify that a test lamp illuminates between the B+ circuit terminal 25 and ground.
- If all circuits test normal, test or replace the BPMV and EBCM assembly.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
DTC C0110 Equal to or over 8600 GVW
Circuit Description
Ground is continuously supplied to the low side of the Antilock Brake System (ABS) pump motor. The electronic brake control module (EBCM) activates the ABS pump by supplying battery voltage to the high side of the motor.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0110 Pump Motor Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects an open pump motor circuit, a shorted pump motor, or a seized pump motor or ABS pump.
Action Taken When the DTC Sets
| • | The EBCM disables the ABS. |
| • | The ABS indicator turns ON. |
Conditions for Clearing the DTC
The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Separate the EBCM from the brake pressure modulator valve (BPMV) in order to inspect for corrosion or any other condition that may cause a poor connection at the pump motor connector. Refer to Electronic Brake Control Module Replacement and Testing for Intermittent Conditions and Poor Connections . If severe corrosion or other damage exists, the BPMV or the EBCM may need to be replaced.
An ECE 13 response may be required, after repairs are made, and DTCs are cleared, operate the vehicle at speeds greater than 13 km/h (8 mph) to complete the self test, and the EBCM will turn off the ABS indicator.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Use a scan tool in order to clear the DTCs. Does the DTC reset? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
4 |
Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure.
Did you complete the replacements? | Go to Step 5 | -- |
5 |
Does the DTC reset? | Go to Step 3 | System OK |
