• | 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 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* | -- |
*The scan tool will not communicate with the EBCM if the battery voltage is less than 7 volts. |
The electronic brake control module (EBCM) monitors the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly. If the EBCM detects low battery voltage, DTC C0899 00 will set.
The ignition is ON.
One of the following conditions exists for 0.5 seconds, or 5 seconds if the engine is cranking:
• | The EBCM detects that the battery voltage is less than 9.7 volts, and the vehicle speed is greater than 0 km/h. |
• | The EBCM detects that the battery voltage is less than 8.45 volts, regardless of vehicle speed. |
• | The antilock brake system (ABS), traction control system (TCS), and vehicle stability enhancement system (VSES) are disabled. |
• | The electronic brake force distribution (EBD) is disabled, if the battery voltage is less than 8.45 volts. |
• | The ABS and vehicle dynamics caution (VDC) indicators turn ON. |
• | The BRAKE warning indicator turns ON, if the battery voltage is less than 8.45 volts. |
• | The driver information center (DIC) displays the SERVICE ESC and SERVICE TRACTION messages. |
• | The indicators and DIC messages will turn OFF when the condition for setting the DTC is no longer present. |
• | The DTC will pass when the condition for setting the DTC is no longer present, and the ignition is cycled. |
• | The EBCM clears a history DTC when the DTC does not fail in 100 consecutive ignition cycles. |
• | A low voltage DTC in multiple modules indicates a concern in the charging system. |
• | The ABS, BRAKE, and VDC indicators, and the SERVICE ESC and SERVICE TRACTION DIC messages, may turn ON without any DTCs set, if the EBCM detects that the battery voltage is less than 9.7 volts, and there is no vehicle speed. |
Antilock Brake System Schematics
Control Module References for scan tool information
⇒ | If not within the specified range, refer to Charging System Test. |
• | Terminal 16 (JL4) |
• | Terminal 26 (JM4) |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
• | Terminal 1 (JL4/JM4) |
• | Terminal 14 (JM4) |
• | Terminal 32 (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.