C0552
DTC C0552
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0552
- Improper Shutdown
Circuit/System Description
When ignition voltage is supplied to the electronic brake control module (EBCM) it becomes active. Battery positive voltage is used by the EBCM to run the antilock brake system (ABS), traction control system (TCS), vehicle stability enhancement system (VSES) and dynamic rear proportion (DRP). When the key is turned OFF and ignition voltage is removed from the EBCM, the system performs an internal shutdown procedure.
Conditions for Running the DTC
* The ECM power down process in the last drive cycle completely finished.
* The ABS conditions and the braking conditions are normal.
Conditions for Setting the DTC
Battery positive voltage or the EBCM ground circuit is disconnected during system operation.
Action Taken When the DTC Sets
There are no actions taken specifically for this DTC. Serial data communication DTCs will normally be accompanied with DTC C0552. The following actions are a result of a loss of communication with the EBCM.
* The EBCM is disabled.
* Dynamic rear proportion (DRP) is disabled.
* The Brake Warning indicator turns ON.
* The traction control system (TCS) is disabled.
* The vehicle stability enhancement system (VSES) is disabled.
* The ABS indicator turns ON.
* The driver information center (DIC) displays the Service Stability System message.
* The DIC displays the Service Traction System message.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
* A loss of battery ground.
* A disconnected battery
* A sudden drop in the system voltage to less than 5 volts.
* Poor power or ground connections.
* An internal EBCM malfunction.
Reference Information
Schematic Reference
Antilock Brake System Schematics (Except JL7) (Antilock Brake System Schematics (Except RPO JL7))Antilock Brake System Schematics (JL7) (Antilock Brake System Schematics (With RPO JL7))
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Engine Control Module Description (Engine Control Module Description)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the EBCM harness connector and connect a test lamp between the battery positive voltage circuit terminal going to the EBCM, and to ground.
2. Ignition ON, verify that the test lamp illuminates.
• If the test lamp does not illuminate, repair the open or high resistance in the battery positive voltage circuit.
3. Connect a test lamp between the battery positive voltage circuit and EBCM ground circuit at the EBCM connector, verify that the test lamp illuminates.
• If the test lamp does not illuminate, repair the open or high resistance in the EBCM ground circuit.
• If test lamp illuminates replace the EBCM.
• If test lamp does not illuminate replace the refer to Diagnostic Aids.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning) for EBCM control module replacement, setup, and programming