When Monitored:
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Variable Cam Timing (VCT) rationality is monitored under the following conditions: (1) Cam phasing is commanded off of the default (lockpin) position; (2) Oil temperature is between -12° C to 139° C (10° F to 282° F); (3) Battery voltage is greater than 10 Volts; (3) Engine speed is at least 650 to 1400 rpm, depending on oil temperature; (4) No CMP sensor, CKP sensor or OBDI plausibility errors. Before VCT can be enabled, reference adaptation must be completed.