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 C0111: Pump Motor Circuit PerformanceDTC C0113: Pump Motor Circuit High
DTC C0114: Pump Motor Circuit Open
DTC C0115: Pump Motor Performance
DTC C0120: Pump Motor Relay Circuit Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | C0114 | C0114 | -- | C0111,C0115 |
Ground | C0114 | C0113 | -- | C0111, C0115 |
Circuit Description
The electronic brake control module (EBCM) supplies B+ to activate the pump motor within the brake pressure modulator valve (BPMV). The EBCM monitors pump motor feedback voltage after activation to detect a stalled or binding pump motor.
Conditions for Running the DTC
C0111
| • | Ignition ON. |
| • | The pump motor has been commanded OFF for longer than 1.4 seconds and then commanded ON. |
| • | Voltage to the pump motor is greater than 11 volts when the pump motor is commanded ON. |
C0113
| • | Ignition ON. |
| • | The system enable relay is ON. |
C0114
| • | Ignition ON. |
| • | The system enable relay is ON. |
| • | The pump motor has been commanded OFF for 1.4 seconds. |
C0115
| • | Ignition ON. |
| • | The system enable relay is ON. |
| • | The pump motor is commanded ON. |
| • | No other pump motor faults have been detected. |
C0120
| • | Ignition ON. |
| • | The system enable relay is ON. |
| • | The pump motor is commanded ON. |
Conditions for Setting the DTC
C0111
The EBCM excessive current draw from the pump motor.
C0113
The EBCM detects an open in the pump motor ground circuit.
C0114
This code sets for a possible open in the pump motor.
C0115
The EBCM monitors pump motor feedback voltage after activation.
C0120
This code sets for a possible open in the internal EBCM pump motor relay circuit.
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the antilock brake system (ABS)/traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
| • | The ABS indicator illuminates |
| • | The driver information center (DIC) displays Service Stability. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | A history DTC will clear after 100 ignition cycles. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
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.
- Ignition OFF, test for less than 1.0 ohm between ground circuit terminal 31 and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 46 and ground.
- If all circuits test normal, replace the BPMV and verify DTC does not reset. If DTC reset, replace the EBCM.
| ⇒ | 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 circuit tests normal and the B+ fuse is open, replace the BPMV. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup and programming |
