For 1990-2009 cars

### Circuit Description

The electronic suspension control (ESC) module performs checks of internal calibration data. If a fault condition is detected, the ESC module will set the fault DTC, and may, depending upon the fault type, turn on the SERVICE SUSPENSION SYSTEM message. Recovery from any controller fault condition is attempted only after the ignition is cycled ON and OFF.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0558 Calibration Data Not Programmed

### Conditions for Running the DTC

The ignition switch is turned ON.

### Conditions for Setting the DTC

• | The DTC is set when any calibration faults internal to the ESC module are detected.

• | The fault is detected during 3 consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with the scan tool.

### Action Taken When the DTC Sets

• | Disable all functionality.

• | Sends a message to the instrument panel cluster (IPC) to display the SERVICE SUSPENSION SYSTEM message.

### Conditions for Clearing the MIL/DTC

• | The scan tool can be used to clear the DTC.

• | The DTC is saved as HISTORY when the ESC module no longer senses the hardware fault and the ignition is cycled OFF and ON.

### Test Description

The number below refers to the step number on the diagnostic table.

1. This step checks to see if the problem has cleared after the ESC module has been calibrated.

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install the scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Calibrate the electronic suspension control (ESC) module using the scan tool.
4. Use the scan tool to clear the DTCs.
5. Operate the vehicle within the Conditions for running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 3

System OK

3 | Replace the ESC module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 4 | --
4 |

1. Use the scan tool in order to clear the DTCs .
2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK