Electronic Suspension Control

DTC C0550
Circuit Description
The Electronic Suspension Control (ESC) module performs internal checks on hardware and software calibrations to ensure valid operation.

DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0550 Electronic Control Unit (ECU) Performance

Conditions for Running the DTC
Upon key on with the ignition in the ON/RUN position.

Conditions for Setting the DTC
The ESC module detects an error with its microprocessor.

Action Taken When the DTC Sets
^ Disable all functions, rear leveling and ESC.
^ The SERVICE RIDE CONTROL message will be displayed.
^ Stores a DTC C0550 in the ESC module memory.

Conditions for Clearing the DTC
^ Using the scan tool.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Diagnostic Aids
^ Program the ESC module and cycle the ignition Off and On to see if DTC C0550 resets. Repeat 2 times before replacement.
^ The replacement ESC module must be programmed when replacement is necessary.

Test Description





The numbers below refer to the step numbers on the diagnostic table.
2. Checking to verify the DTC will not reset.
3. Replace the ESC module and program.