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Diagnostics and Drivability
Figure 5- Displayed are scope patterns that illustrate how volts leads the amps in an AC powered circuit that’s mostly inductive (L) and the opposite when the AC powered circuit is mostly capacitive (C). “ELI the ICE man” is a simple mnemonic to help remember the differences in “phasing” between volts and amps in the two different types of AC circuits.
Diagnostics and Drivability
Powering up your AC current diagnostic skills
With AC current, what you don’t know can hurt you, damage your test equipment, and fool your diagnostics.
March 1, 2022
Photo courtesy of Prasit Rodphan on Adobe Stock
With EVs and hybrid vehicles falling out of warranty, more independent shops are finding them in their bays, meaning shops must be prepared to handle these vehicles.
Diagnostics and Drivability
EV maintenance in the independent shop
Aug. 31, 2026
Photo courtesy of Scott Brown
Tesla 'Service Mode'
Diagnostics and Drivability
Tesla diagnostics — Next level vehicle access
June 3, 2026
2026 PTEN Scan Tool Spec Guide
Whitepapers
2026 Scan Tool Spec Guide
June 2, 2026
Photo courtesy of Scott Brown
ADAS calibration
Diagnostics and Drivability
Integrating ADAS inspection and maintenance into vehicle service routines
May 4, 2026
Autozone
tg2500001
Service Repair
GDI Fuel Systems: What You Need to Know About Modern Fuel Injection
March 31, 2026
Scan Tools
Diagnostics and Drivability
Leveraging your Scan Tool's Strengths and Recognizing Weaknesses
March 10, 2026
132496487 | Abstract © Stevanovicigor | Dreamstime.com
Error
Diagnostics and Drivability
Finding the limitations of your tools
Jan. 7, 2026
Brandon Steckler
This correlation capture represents what a known-good capture displays. Unfortunately, the shop that repaired the wiring failed to capture this same correlation waveform after the repair. Although this capture is not from the subject vehicle, its characteristics would be identical and sufficient for the PCM to leverage as a proper signal input.
Service Repair
Solved: 2008 Jeep Wrangler 3.8L, P0340 + P0344
Dec. 9, 2025
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