In this new Motor Age Tech Tip, Dorman training instructor Pete Meier walks technicians through a fast, reliable way to diagnose Variable Valve Timing (VVT) issues using the Autel MaxiSYS Ultra S2.
Many drivability complaints trace back to improper valve timing, but not every vehicle offers automotive bidirectional controls, which means techs need alternative testing strategies. In this video, Meier demonstrates how the Ultra S2 serves as a full diagnostic platform, combining code scans, MOTOR TruSpeed repair information and VCMI-based engine sensor waveform analysis to validate whether a cam phaser is operating within its expected range.
Technicians will learn how to review OE and global OBDII codes, check TSBs, analyze cam and crank signals and manually command VVT actuators when necessary. Meier also shows how to compare CMP movement to CKP timing marks and how the Ultra S2’s split-screen mode simplifies monitoring data PIDs and scope patterns simultaneously.
Whether you’re diagnosing rough idle, lack of power, hesitation, or other VVT-related drivability concerns, this walkthrough provides a clear, real-world method you can use today. For more information, visit autel.us/product/maxisys-ultra-s2/.
About the Author
Pete Meier
Former Creative Director, Technical | Vehicle Repair Group
Pete Meier is the former creative director, technical, for the Vehicle Repair Group with Endeavor Business Media. He is an ASE certified Master Technician with over 35 years of practical experience as a technician and educator, covering a wide variety of makes and models. He began writing for Motor Age as a contributor in 2006 and joined the magazine full-time as technical editor in 2010. Pete grew the Motor Age YouTube channel to more than 100,000 subscribers by delivering essential training videos for technicians at all levels.
Connect with Pete on LinkedIn.