DTC 37

DTC 37 High System Voltage:

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

FAILURE CONDITION
DTC AO37 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 volts, a malfunction exists.

ACTION TAKEN
A malfunction DTC is stored, ABS is disabled and the ABS indicator lamp is turned "ON."

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This step checks the voltage level being received by the EBCM. If high voltage is present, a charging system problem is indicated.

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 Tech 1 tool.

Any circuitry, that is suspected as 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.