Scan Tool Testing and Procedures

The CVRSS module has the ability to store trouble codes as CURRENT or HISTORY. Most CVRSS system malfunctions will cause the SERVICE RIDE CONTROL message to be displayed and set a CVRSS DTC. The fault message will be displayed as long as the DTC is CURRENT. The message will be turned off if a fault is no longer present (i.e., goes HISTORY) during an ignition cycle. HISTORY DTCs are intermittent malfunctions and must be diagnosed differently than CURRENT DTCs. Refer to INTERMITTENTS AND POOR CONNECTIONS in this section for a complete description on how HISTORY DTCs are used to diagnose intermittent faults. If CURRENT DTCs are stored in the CVRSS module, or if the SERVICE RIDE CONTROL message is displayed and no DTCs are set, refer to the CVRSS SYSTEM CHECK chart before attempting any diagnostic procedures.