• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of this diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
B+ | C0899 00, C0899 03 | C0899 00, C0899 03 | -- | -- |
Ground | -- | C0899 00, C0899 03 | -- | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.6 Volts | |||
B+ | 0.0 Volts | 0.0 Volts | 12.6 Volts |
The electronic brake control module (EBCM) monitors the battery positive (B+) voltage level available for system operation. A low voltage condition prevents the system from operating properly.
The ignition is ON.
The ignition voltage available to the EBCM is less than 9 volts for 100 msec.
• | The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle |
• | The vehicle dynamics caution (VDC) indicator turns ON. |
• | The condition for the DTC is no longer present. |
• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
A low voltage DTC in multiple modules indicates a concern in the charging system.
• | Antilock Brake System Schematics for less than 3900 kg (8600 lb) GVW |
• | Antilock Brake System Schematics for greater than 3900 kg (8600 lb) GVW |
• | ABS Description and Operation for less than 3900 kg (8600 lb) GVW |
• | ABS Description and Operation for greater than 3900 kg (8600 lb) GVW |
• | Circuit Testing |
• | Wiring Repairs |
Control Module References for scan tool information
⇒ | If not within the specified range, refer to Charging System Test. |
• | Terminal 11 (JL4) |
• | Terminal 38 (w/o JL4) |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
• | Terminal 1 (JL4) |
• | Terminal 25 (w/o JL4) |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming.