DTC C0110. Chevrolet Express

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 Express - AWD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC C0110

DTC C0110 with JL9

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 04: Pump Motor Circuit Open Circuit

DTC C0110 61: Pump Motor Circuit Actuator Stuck

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	--	C0110 04, C0110 61	--	--
Ground	--	C0110 04, C0110 61	--	--

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

•	Ignition ON.

•	Initialization is complete.

Conditions for Setting the DTC

•	The EBCM 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/VSES for the duration of the ignition cycle.

•	The ABS indicator illuminates.

•	The Traction Control and VSES indicators illuminate.

•	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 clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

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.

•	Terminal 28

•	Terminal 11

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.

•	Terminal 18

•	Terminal 1

⇒	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.

If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Brake Pressure Modulator Valve Replacement

•	Control Module References for EBCM replacement, setup, and programming

DTC C0110 with JL4