C1237

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

Conditions for Setting the DTC
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
ABS/TCS/Active Handling (if equipped with RPO JL4) are disabled.
^ Indicators that turn on:
^ ABS indicator
^ Car Icon (TCS indicator)
^ Messages displayed on the DTC:
- Service ABS
- Service Traction System
- Service Active HNDLG (if equipped with Active Handling RPO JL4)

Conditions for Clearing the DTC
^ Condition for DTC is no longer present and scan tool clear DTC function is used.
^ Fifty ignition cycles have passed with no DTCs detected.

Diagnostic Aids
^ If an intermittent malfunction exists refer to Testing for Electrical Intermittents in Diagrams, Diagnostic Aids.
^ Possible causes for DTC C1237 to set:
^ Overcharging

Test Description
The numbers below refer to step numbers on the diagnostic table.
2. Checks to see what the EBCM is reading as the voltage.
3. Checks the actual battery voltage.