C1251
DTC C1251
Circuit Description
The pump motor relay is part of the electronic brake control module (EBCM). The EBCM turns ON and OFF the pump motor relay as deemed necessary to activate the pump motor.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C1251 Pump Motor Performance
Conditions for Running the DTC
DTC C1251 can be set anytime the pump motor is actuated.
Conditions for Setting the DTC
The EBCM detects a stuck pump motor.
Action Taken When the DTC Sets
* The Antilock Brake System (ABS) is disabled.
* The ABS warning indicator turns ON.
* The vehicle stability control (VSC) is disabled, if equipped.
* The VSC warning indicator turns ON, if equipped.
Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
Diagnostic Aids
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.
The following are possible causes of the malfunction:
* An open or high resistance in the EBCM ground circuits
* An internal EBCM malfunction
If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
Test Description
The number below refers to the step number on the diagnostic table.
2. This step determines if the DTC is current.
