• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the 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** | -- | -- |
* W/O JL4 ** JL4 |
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 scan tool will not communicate with the EBCM if there is 0 Volts on the circuit. |
The electronic brake control module (EBCM) monitors the battery positive (B+) voltage level available for system operation. A high or low voltage condition prevents the system from operating properly, and may cause damage to the system.
The ignition is ON.
The battery voltage is greater than 16 V for 100 msec.
• | The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle. |
• | The antilock brake system (ABS) is disabled if voltage exceeds 19.5 V. |
• | The EBCM requests the MIL to be turned ON. |
• | The BRAKE indicator turns ON. |
• | The antilock brake system (ABS) indicator turns ON if voltage exceeds 19.5 V. |
• | The vehicle dynamics caution (VDC) indicator turns ON. |
• | The driver information center (DIC) displays the SERVICE TRACTION CONTROL message. |
• | The DIC displays the SERVICE STABILITRAK message. |
• | The DIC displays the SERVICE BRAKES SOON message. |
• | 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. |
• | This DTC could be set by overcharging with a battery charger or jump starting. |
• | A high 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 |
Control Module References for scan tool information
⇒ | If not within the specified range, refer to Charging System Test. |
⇒ | If greater than the specified range, replace the EBCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming.