C1287

EBCM/Brake Indicator Control Schematic:

CIRCUIT DESCRIPTION
This Diagnostic Trouble Code (DTC) identifies an open circuit between the Electronic Brake Control Module (EBCM) and the red BRAKE warning lamp. This condition does not allow the red BRAKE warning lamp to be illuminated by the EBCM.

CONDITIONS FOR SETTING THE DTC
This DTC will set when the following condition are met:
^ This DTC can be set after vehicle speed exceed 5 km/h (3 mph).
^ The BRAKE indicator lamp circuit voltage is between 3.35 and 5.23 volts, indicating an open circuit.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored and ABS is no disabled. However, if the EBCM commands the rear BRAKE warning lamp ON due to an ABS malfunction that may degrade base braking operation and cannot do so, the ABS indicator lamp will flash to indicate the Serious Nature of the problem.

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 frequency of the malfunction can be checked by using the Enhanced Diagnostic function of the Tech 2 scan tool, as described in Enhanced Diagnostics.

An Intermittent Malfunction - may be caused by a poor connection, rubbed through wire insulation or a wire that is broken inside the insulation. Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked 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.

DTC C1287 Red BRAKE Warning Indicator Circuit Open (Part 1 Of 2):

DTC C1287 Red BRAKE Warning Indicator Circuit Open (Part 2 Of 2):

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
[2] Identifies if the malfunction is currently present.
[3] Indicates if the EBCM and circuitry has the ability to complete the ground to the BRAKE indicator and illuminate it.
[4] Checks for a faulty diode # 2.
[5] Determines whether or not the condition is intermittent or due to a malfunctioning EBCM.
[7] Determines whether the open circuit is due to an EBCM malfunction or an open in the BRAKE indicator circuit.