PCM Archives - Tomorrows Technician
ECM And PCM Calibration Numbers

Finding out if the vehicle has the latest version or calibration on a module is a required step.

ECM/PCM Communication Issues (VIDEO)

Before you swap out a module that won’t communicate, do a few simple inspections. Sponsored by The Group Training Academy.

Honda LIN Line Controlled Charging Systems

Honda’s charging system solution includes a dedicated local interconnect network (LIN) line that connects the alternator and the powertrain control module (PCM).

Honda Engine
Walking The Talk With PCM/CAN Bus Communication Problems

If you don’t have much experience working with CAN bus communications systems, you’re not alone.

Restoring Engine-Computer Communications

For this month’s Real World case, we will attempt to provide a plan of attack for communication issues on General Motors products with the Class 2 Protocol. Our diagnostic journey begins with a 2004 Chevrolet Tahoe. This vehicle was tested at the EPA test facility in our area and it was determined that there is

FRED on Evap Tip Clip

In this Tip Clip Dave Hobbs talks about EVAP and FREDS, you know Frustrating Ridiculous Electronic Devices, things like PCM’s and ECM’s. He talks about the logic of how these devices control the operation of the vehicle’s evap system. He discusses how the ‘brain’ of the evap system handles things like the operational nature of the evap system such as purge. He also goes into detail regarding how the FRED also handles the regulatory side of things such as EPA guidelines and leak tests.