For 1990-2009 cars only
Diagnostic Instructions
| • | 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. |
DTC Descriptor
DTC C0899: Device Voltage LowDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+/IGN | C0899 | C0899 | -- | -- |
Ground | -- | C0899 | -- | -- |
Circuit/System Description
The electronic brake control module (EBCM) monitors the ignition voltage level available for system operation. A low voltage condition prevents the system from operating properly.
Conditions for Running the DTC
ignition is ON.
Conditions for Setting the DTC
This DTC will set if the B+ voltage to EBCM is less than 9 V for 100 msec.
Action Taken When the DTC Sets
| • | The ABS indicators illuminates on the IPC. |
| • | The brake warning indicator illuminates. |
Conditions for Clearing the DTC
| • | 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. |
Diagnostic Aids
| • | A low voltage DTC in multiple modules indicates a concern in the charging system |
| • | Inspect the ground connection G202 to ensure that it is clean and tight. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Verification
- Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V.
- Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.5 V.
| ⇒ | If not within the specified range, refer to Charging System Test |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition OFF, and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminals listed below and ground:
- Ignition ON,verify that a test lamp illuminates between the B+/IGN. circuit terminals listed below and ground:
- If all circuits test normal, replace the EBCM.
| • | Terminal 1 |
| • | Terminal 29 |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| • | Terminal 15 |
| • | Terminal 42 |
| • | Terminal 43 |
| • | Terminal 9 |
| • | Terminal 12 |
| ⇒ | If the test lamp does not illuminate, test the B+/IGN circuits for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup and programming
