Diagnostic Instructions
DTC Descriptor
DTC C0900 : Device Voltage High
Circuit/System Description
The electronic brake control module (EBCM) monitors the ignition voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected, the EBCM turns OFF the system relay which removes battery voltage
from the solenoid valves and pump motor.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The system voltage is greater than 16 volts for 100 msec.
Action Taken When the DTC Sets
| • | The ABS, dynamic rear proportioning (DRP), and the traction control system (TCS) (JL9) are disabled for the duration of the ignition cycle. |
| • | The red brake warning indicator turns ON. |
| • | The ABS indicator turns ON. |
| • | The vehicle dynamics caution (VDC) indicator turns ON (JL9). |
| • | The driver information center (DIC) displays the SERVICE TRACTION CONTROL message (JL9). |
Conditions for Clearing the MIL/DTC
| • | The ABS indicator may remain illuminated after repairs are made and DTCs are cleared, until the vehicle is operated at speeds greater than 13 km/h (8 mph) and the self test is completed. |
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM will clear a history DTC when a malfunction is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
Test the charging system. Refer to
Charging System Test
.
