ABS - With Traction Control

DTC C1214 Part 1 Of 3:

DTC C1214 Part 2 Of 3:

DTC C1214 Part 3 Of 3:

CIRCUIT DESCRIPTION
Ignition voltage is supplied through terminal A1 of the electronic brake control relay. The EBCM/EBTCM is then able to energize the pull-in coil by completing the ground circuit at connector C1 terminal All of the EBCM/EBTCM. The magnetic field created closes the electronic brake control relay contacts and allows battery voltage and current through the electronic brake control relay terminal C1 to be supplied to the EBCM/EBTCM through connector C2 terminal C, which supplies power to the motors and solenoids.

CONDITIONS FOR SETTING THE DTC
DTC C1214 can be set anytime after the EBCM/EBTCM commands the electronic brake control relay on (the electronic brake control relay is first commanded on during the three second bulb check). This test monitors the availability of current voltage to the motors and solenoids. This malfunction indicates voltage is not available and would therefore not allow ABS/ETS operation if required.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/ETS is disabled, and the amber ABS warning indicator is turned on. The red BRAKE warning indicator is turned on if the rear piston in the ABS brake motor pack is not in the home position.

CONDITIONS FOR CLEARING DTC
Condition for DTC is no longer present and the scan tool (CLEAR DTCs) function is used, or 100 drive cycles have passed with no DTC(s) detected.

DIAGNOSTIC AIDS
An intermittent problem may be caused by a poor connection, rubbed-through wire insulation, or a wire that is broken inside the insulation. The frequency of the problem can be checked by using the enhanced diagnostic function of the Scan Tool. 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.

VIBRATION TEMPERATURE EFFECTS
Check for vibration effects by performing the relay test function of the Scan Tool. With the relay test commanded on, lightly tap the top and sides of the electronic brake control relay while monitoring the electronic brake control relay voltage. If the electronic brake control relay voltage changes significantly, replace the electronic brake control relay. If DTC C1214 only sets when the vehicle is initially started in cold ambient conditions (temperature less than 0�C 32�F), replace the electronic brake control relay.

Note: J 39200 test leads must be zeroed prior to making any resistance measurements.