When Monitored:
WARNING: This page is about a different car, the 2011 RAM Pickup. 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.