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C0286 or C086

CIRCUIT DESCRIPTION
The amber ANTILOCK indicator lamp is supplied ignition voltage through the GAUGES fuse. The output of the Electronic Brake Control Module (EBCM) will be high (battery voltage) when the lamp is off, and will be low (ground) when the lamp is on. If DTC C0286 sets, the EBCM will store the code in memory but will not disable the ABS. If DTC C0286 is in memory and a different fault occurs, the EBCM will turn on the red BRAKE indicator lamp to notify the driver of the problem.

CONDITIONS FOR SETTING THE DTC
^ High voltage is present on the ABS indicator lamp control circuit when low voltage is expected (lamp is turned on)
^ Anything that keeps the ABS indicator lamp circuit high when the lamp is expected to be on

ACTION TAKEN WHEN THE DTC SETS
^ The ABS is not disabled
^ The Electronic Brake Control Module (EBCM) will use the red BRAKE warning lamp to alert the driver of an ABS malfunction

CONDITIONS FOR CLEARING THE DTC
^ Repair the conditions responsible for setting the Diagnostic Trouble Code (DTC)
^ Use the Scan Tool Clear DTCs function

DIAGNOSTIC AIDS
Diagnostic Trouble Code (DTC) C0286 typically sets because of a shorted ABS indicator lamp. A DTC C0286 can also set because of a short to voltage in the wiring between the ABS indicator lamp and the EBCM.

TEST DESCRIPTION
The numbers below refer to the steps in the diagnostic table:
2. This step checks for normal operation of the ABS indicator lamp.
3. This step turns off the ABS indicator lamp with a J 36169-A.