C0110
DTC C0110
Circuit 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 ABS or traction control system (TCS) operation is required the EBCM activates the pump motor relay and battery power is provided to the pump motor.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0110 Pump Motor Circuit Malfunction
Conditions for Running the DTC
* The ignition switch is in the ON position.
* Initialization is complete.
Conditions for Setting the DTC
* Pump motor voltage is not present 100 milliseconds after activation of the pump motor relay.
* Pump motor voltage is present for more than 1 second with no activation of the pump motor relay within 5 seconds.
* Pump motor voltage is not present for 40 milliseconds after the pump motor relay is commanded off.
Action Taken When the DTC Sets
If equipped, the following actions occur:
* The EBCM disables the ABS/TCS for the duration of the ignition cycle.
* A malfunction DTC will set.
* The ABS indicator turns ON.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
* It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
* Thoroughly inspect any circuitry that may be causing the complaint for the following conditions:
^ Backed out terminals
^ Improper mating
^ Broken locks
^ Improperly formed or damaged terminals
^ Poor terminal-to-wiring connections
^ Physical damage to the wiring harness
* The following conditions may cause an intermittent malfunction:
^ A poor connection
^ Rubbed-through wire insulation
^ A broken wire inside the insulation
* 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.
3. This step tests the pump motor circuits of the BPMV for a short to the housing of the BPMV.
