Circuit Description
The EBCM monitors the voltage level available for system operation. If the voltage level is too high, damage may result in the system. When the EBCM detects a high voltage condition, the EBCM turns OFF the solenoid valve relay which removes battery voltage from the solenoid valves.
Conditions for Running the DTC
The vehicle speed is greater than 8 km/h (5 mph).
Conditions for Setting the DTC
The solenoid relay voltage is greater than 17 volts for 0.72 seconds.
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle. |
| • | The ABS indicator turns ON. |
| • | The Traction Control indicator turns ON. |
| • | The DIC displays the Service Stability System message. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function. |
| • | The condition for the DTC is no longer present (the DTC is not current) and you used the On-Board Diagnostics Clear DTC function. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 50 consecutive drive cycles. |
Diagnostic Aids
A possible cause of this DTC is overcharging.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Uses the scan tool in order to inspect the voltage to the EBCM.
-
Uses the scan tool in order to inspect the voltage to the body control module (PZM). A high voltage value in multiple modules indicates a concern in the charging system.
-
Verifies that the condition is still present.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | ||||
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | |
Does the scan tool indicate that the voltage is greater than the specified value? | 17 V | Go to Step 3 | Go to Diagnostic Aids | |
With the scan tool, observe the Battery Voltage parameter in the Body Control Module data list. Does the scan tool indicate the voltage is greater than the specified value? | 17 V | Go to Diagnostic System Check - Engine Electrical in Engine Electrical | Go to Step 4 | |
Does the DTC reset? | -- | Go to Step 5 | Go to Diagnostic Aids | |
5 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
