C0267

DTC C0267 or C0268
Circuit Description
The EBCM applies the ground needed for pump motor activation. The low side of the pump motor has a feedback circuit to the EBCM. When the pump motor is commanded OFF and at rest, feedback voltage is high. When the pump motor is winding down after being commanded ON and then OFF, feedback voltage is low. The EBCM monitors this feedback voltage in order to determine if the motor is functioning properly.

DTC Descriptors
This diagnostic procedure supports the following DTC's:
^ DTC C0267 Pump Motor Circuit Open
^ DTC C0268 Pump Motor Circuit Shorted

Conditions for Running the DTC
^ The ignition is ON.
^ The vehicle speed is greater than 6 km/h (4 mph).

Conditions for Setting the DTC
The EBCM detects any of the following conditions:
^ An open or shorted pump motor
^ An open or shorted pump motor driver circuit
^ A seized pump motor

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 DTC's function.

Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents, Testing for Intermittent Conditions and Poor Connections, Wiring Repairs and Connector Repairs. Component Tests and General Diagnostics

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. It is imperative that the vehicle be driven to attempt to reset the DTC. Using the scan tool to perform a function test may not produce the same result, and therefore, may cause misdiagnosis of the vehicle.
7. This step tests if the EBCM is capable of activating the ABS pump motor.
8. A shorted ABS pump motor may damage the EBCM. It is imperative that the steps in the table be followed in order to prevent damage to a replacement EBCM.

Step 1 - Step 5:

Step 6 - Step 11:

Step 12 - Step 15: