C1237

DTC C1237: High System Voltage:

DTC C1237 Schematic:

CIRCUIT DESCRIPTION
This circuit is designed to detect high vehicle voltage levels to the solenoid relay. High voltage may cause damage to the system.

CONDITION FOR SETTING THE DTC
Diagnostic Trouble Code (DTC) C1237 can only be set if the vehicle's speed is greater than 8 km/h (5 mph). If the battery voltage is greater than 17 volts, a malfunction exists.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/TCS is disabled and the ABS and TRACTION OFF Indicator lamps are turned ON.

CONDITIONS FOR CLEARING THE DTC
Condition for DTC is no longer present and scan tool clear function is used. Fifty start cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
Possible cause:
- Overcharging

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
[2] Checks the battery voltage reported by the EBTCM.
[3] Checks the actual battery voltage.