The ESC Scan Tool Data List contains all the electronic suspension control system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the location of the parameter within the scan tool menu selections.

Use the ESC Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Vehicle Diagnostic System Check.

Use the ESC Scan Tool Data List only after the following is determined:

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.

A scan tool must be used in diagnosing system malfunctions before removing or replacing any of the components. Become familiar with the scan tool diagnostic capabilities and thoroughly understand each of the diagnostic features described before attempting any diagnostic procedures. The scan tool is capable of displaying data and input/output information from all of the systems connected to the serial data line. The scan tool is also capable of commanding the shock absorbers ON or OFF without the need for any input information.

The scan tool's input display function can be helpful in determining if the ESC module is receiving the correct input status. This can assist in determining if the ESC system is actually commanding a shock absorber. For example, the ESC system requires the input status from the ride control switch in order to determine the ride settings. A starting point might be to select the ride control switch data display function from the scan tool menu. The input status should change when the switch is manually operated. If no change occurred, then the problem is current and the input could be stuck. A shorted, open or malfunctioning switch or related wiring might cause the input to be stuck. If the change did occur, the problem is intermittent. In order to diagnose this condition using a scan tool, select the scan tool's input function. Then, watch the ride control switch input while moving the suspected wiring/connector. Try to duplicate the malfunction conditions. This scan tool feature allows checks that could not be performed while driving the vehicle.