• | 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 | C0899 | -- | -- |
Ground | -- | C0899 | -- | -- |
The electronic brake control module (EBCM) monitors the system voltage level available for ABS operation. A low voltage condition prevents the ABS system from operating properly.
Ignition is ON.
This fault will be set if the system voltage to EBCM is less than 9 volts for 100 msec.
• | Antilock Brake System (ABS) and Traction Control System (TCS) are disabled for the duration of the ignition cycle. |
• | The ABS and TCS indicators illuminates on the IPC. |
• | The DIC displays the Service Stability System message, if equipped. |
• | 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
Control Module References for scan tool information
⇒ | If the battery voltage is not within the specified range, refer to Charging System Test. |
• | Terminal 16 |
• | Terminal 45 |
⇒ | If greater than the specified range, test the ground circuits for an open/high resistance. |
• | Terminal 2 |
• | Terminal 31 |
⇒ | If the test lamp did not illuminate, test the B+ circuits 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