Monitor Conditions

Variable Valve Timing (VVT) rationality is monitored under the following conditions: (1) Cam phasing is commanded off of the default (lock pin) 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 VVT can be enabled, reference adaptation must be completed.