C1276

EBCM/Solenoid Circuit Schematic:

CIRCUIT DESCRIPTION
This Diagnostic Trouble Code (DTC) identifies a solenoid that cannot be energized due to an open in its circuitry, or a solenoid that is always energized due to a short to battery in its circuitry between the driver and the solenoid. An open will not allow proper ABS operation, but the short to battery simply turns ON the solenoid. A path for base brakes is still allowed once the motor re-homes and the check ball is lifted off its seat during initialization.

CONDITIONS FOR SETTING THE DTC
This DTC will set when the following conditions are met:
^ The Electronic Brake Control Module (EBCM) detects a short to voltage or open in CKT 9I01 and/or open in CKT 9V01.
^ This DTC can be set only when the solenoid is

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS is disabled, and the amber ABS indicator lamp is turned ON.

CONDITIONS FOR CLEARING THE DTC
^ Conditions for the malfunction are no longer present and the Tech 2 scan tool Clear DTC Information function is used.
^ One hundred drive cycles have passed with no malfunctions detected.

DIAGNOSTIC AIDS
The following list contains items that need to be inspected when diagnosing this system:
^ Open/high resistance or short to voltage of the left front solenoid CKT 9I01 and/or open in CKT 9V01.
^ Faulty left front solenoid (high/infinite coil resistance).

NOTE: An intermittent malfunction is most likely caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

The Frequency Of The Malfunction can be checked by using the Enhanced Diagnostic function of the Tech 2 scan tool, as described in Enhanced Diagnostics.

Inspect The Following Harness Connectors For - backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness before component replacement:
^ Left front ABS solenoid connector.
^ EBCM connector C1.

DTC C1276 Left Front Solenoid Circuit Open Or Shorted To Voltage (Part 1 Of 2):

DTC C1276 Left Front Solenoid Circuit Open Or Shorted To Voltage (Part 2 Of 2):

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
[2] Checks for a short to voltage in CKT 9I01.
[3] Checks for an open in CKT 9I01.
[4] Checks for an open in CKT 9V01.
[5] Checks resistance of the ABS solenoid.