Power Steering System
DTC C0900
Circuit Description
The power steering control module (PSCM) has a discrete battery voltage supply circuit. The PSCM monitors the voltage level on this circuit to protect itself against high voltage damage.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0900 Device 1 Voltage High
This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
Power Steering System voltage is greater than 16 volts for at least 1 second.
Action Taken When the DTC Sets
^ DTC C0900 00 is stored in memory.
^ The DIC displays the POWER STEERING warning message.
^ The PSCM is disabled to protect itself.
^ No steering assist is provided.
Conditions for Clearing the MIL/DTC
^ A current DTC will clear when the Power Steering System voltage returns to less than 16 volts.
^ A history DTC will clear after 100 consecutive ignition cycles from when Power Steering System voltage is less than 16 volts.
^ Using a scan tool
Diagnostic Aids
Jump starting the vehicle, or turning ON the ignition while charging the vehicles battery can cause DTC C0900 00 to set.
