Circuit Description
The EBCM is required to operate within a specified range of voltage to function properly. The EBCM monitors for high voltage conditions which could damage the EBCM. The EBCM is designed to detect high vehicle voltage levels to the solenoid relay. High voltage may cause damage to the system.
Conditions for Running the DTC
The vehicle speed is greater than 8 km/h (5 mph).
Conditions for Setting the DTC
The battery voltage is greater than 17 volts for 0.72 seconds.
Action Taken When the DTC Sets
| • | ABS/TCS is disabled. |
| • | ABS/TCS Indicators are turned on. |
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC function is used. |
| • | 100 ignition cycles have passed with no DTCs detected. |
Diagnostic Aids
| • | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
| • | If an intermittent malfunction exists refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
| • | Check for other high voltage conditions. |
| • | Test the charging system for overcharging conditions. Refer to Battery Inspection/Test in Engine Electrical. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate that the battery voltage is greater than the specified voltage? | 17 V | Go to Step 3 | Go to Diagnostic Aids |
3 | With a scan tool, observe the Electronic Battery Feed parameter in the BCM data list. Does the scan tool indicate the electronic battery feed is greater than specified value? | 17 V | Go to Battery Inspection/Test | Go to Step 4 |
4 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | -- | Go to Step 5 | -- |
5 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
