DTC C0550. Cadillac DTS 2006

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2006 🢒 DTS 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 DTC C0550

DTC Descriptor

DTC C0550 31: Electronic Control Unit (ECU) Performance. - General Checksum Failure

DTC C0550 32: Electronic Control Unit (ECU) Performance. - General Memory Failure

DTC C0550 38: Electronic Control Unit (ECU) Performance. - Supervision Software Failure

DTC C0550 39: Electronic Control Unit (ECU) Performance. - Internal Electronic Failure/Discard

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

When the ignition is turned ON, the electronic suspension control (ESC) module monitors communications between its internal microprocessors and performs self-diagnostic tests. If an internal malfunction is detected, the ESC module will store a DTC C0550 in its memory.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

•	The ESC module detected an internal malfunction.

•	The malfunction must be detected when the ignition switch is first turned on.

Action Taken When the DTC Sets

•	The ESC module disables all ESC functionality.

•	The ESC module disables all ESC functionality a message to the instrument panel cluster (IPC) to display the SERVICE SUSPENSION SYSTEM message

Conditions for Clearing the DTC

•	Under all fault conditions, the ignition must be cycled before this DTC can be changed from current to history.

•	The ESC module no longer detects any internal malfunctions when the ignition is first turned to the ON position.

•	A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

•	Scan Tool Output Controls

•	Scan Tool Data List

•	Scan Tool Data Definitions

Circuit/System Verification

Verify that DTC C0550 is not set

⇒	If the DTC, is set replace the ESC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ESC replacement, setup, and programming.