With RPO JL4

DTC C0265 or C0266 (w/JL4)





Circuit Description
The ABS relay supplies battery voltage to six valve solenoids. The EBCM microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.

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 an internal malfunction.

Action Taken When the DTC Sets
C0265
If equipped, the following actions may occur:
^ The EBCM disables the DRP/ABS/TCS/VSES.
^ The ABS indicator turns ON.
^ The traction off indicator turns ON.
^ The red brake warning indicator turns ON.
^ The message center displays the SERVICE STABILITY SYSTEM message.

C0266
If equipped, the following actions may occur:
^ The EBCM disables the ABS/TCS/VSES.
^ The ABS indicator turns ON.
^ The traction off indicator turns ON.
^ The message center displays the SERVICE STABILITY SYSTEM message.

Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.

Diagnostic Aids

Important: Whenever the EBCM is replaced for DTC C0265 or C0266, the ABS pump motor and motor circuitry must be tested for the proper resistance. Refer to steps 3 and 4 in the diagnostic table below for testing procedures and resistance values. Replace the EBCM if DTC C0265 or DTC C0266 continues to set intermittently.

Test Description
The number below refers to the step number on the diagnostic table.
3. A shorted ABS pump motor may damage the contacts within the system relay. It is imperative that the steps in the table be followed in order to prevent damage to a replacement EBCM.