• | 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 00 | -- | -- |
Ground | -- | C0899 00 | -- | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Ignition ON, engine OFF. Parameter Normal Value: 12.60 Volts | |||
B+ | 0.00 Volts | 0.00 Volts | 12.60 Volts |
The electronic brake control module (EBCM) monitors the battery voltage available for system operation. A high or low voltage condition prevents the system from operating properly. If the EBCM detects battery voltage out of range, DTC C0899 or DTC C0900 will set.
• | The ignition is ON. |
• | The vehicle speed is greater than 6 km/h (3.7 mph). |
The EBCM detects that the battery voltage is less than 9.3 volts.
The EBCM detects that the battery voltage is greater than 16.8 volts.
• | The antilock brake system (ABS), traction control system (TCS), and vehicle stability enhancement system (VSES) are disabled. |
• | The dynamic rear proportioning (DRP) is disabled, if the battery voltage is less than 6.9 volts. |
• | The ABS and traction control indicators turn ON. |
• | The BRAKE indicator turns ON, if the battery voltage is less than 6.9 volts. |
• | The driver information center (DIC) displays the TRACTION CONTROL OFF message 1 time. |
• | The DIC displays the SERVICE STABILITRAK and SERVICE TRACTION CONTROL messages. |
• | The ABS, DRP, TCS, and VSES are disabled. |
• | The ABS, BRAKE, and traction control indicators turn ON. |
• | The DIC displays the TRACTION CONTROL OFF message 1 time. |
• | The DIC displays the SERVICE STABILITRAK and SERVICE TRACTION CONTROL messages. |
• | The DTC will pass when the condition for setting 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. |
• | The ABS, BRAKE, and traction control indicators turn OFF when the DTC passes, or when the battery voltage is greater than 9.5 volts. |
• | A high or low voltage DTC in multiple modules indicates a concern in the charging system. |
• | DTC C0900 could be set by overcharging with a battery charger or jump starting. |
• | The ABS, BRAKE, and traction control indicators may turn ON without any DTCs set, if the EBCM detects that the battery voltage is less than 9.5 volts, and the vehicle speed is less than 6 km/h (3.7 mph). |
Antilock Brake System Schematics
Control Module References for scan tool information
⇒ | If not within the specified range, refer to Charging System Test. |
• | Terminal 13 |
• | Terminal 38 |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
• | Terminal 1 |
• | Terminal 25 |
⇒ | 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.