ABS - With Traction Control

CIRCUIT DESCRIPTION
This DTC is designed to detect high vehicle voltage levels prior to any required motor movement (initialization or ABS/ETS). If excessive voltage exists, demagnetization of the motor magnets may occur, which would eventually affect or eliminate ABS/ETS performance.

CONDITIONS FOR SETTING THE DTC
DTC C1237 can only be set if the vehicle's speed is greater than 5 km/h (3 mph). If the switched battery voltage is greater than 17.1 volts, a malfunction exists.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/ETS is disabled, and the amber ABS warning indicator is turned on.

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 malfunction may be 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 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.

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