Ignition Cycle Counting

Important: If a vehicle is brought in with a complaint about ride quality or leveling system operation, but no CVRSS fault DTCs are stored, always perform the following steps before concluding that no electrical fault is present.

1. Clear fault DTCs (This will disable the Ignition Cycle Counting function for the current ignition cycle and thus allows any intermittent or new fault conditions which are present to result in fault DTCs).
2. Drive the vehicle above 50 MPH (80 km/h) for at least 20 seconds.
3. Read fault DTCs. If fault DTCs are now present, refer to the corresponding fault diagnostics.

If there are still no fault DTCs stored, then there are no electrical faults apparent in the system. Investigate mechanical causes for the complaint.

It is important to note that intermittent fault conditions, although not causing SERVICE RIDE CONTROL activation or fault DTC storage, do cause activation of one or more system degraded modes. For example, an intermittent position sensor input fault causes the system to intermittently enter a speed-dependent damping mode in which the sensor information is not used; however, no SERVICE RIDE CONTROL message is displayed, nor a fault DTC stored, until the fault condition has been continually present for several ignition cycles.