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ECM Damage

Engineers have devised two strategies that can be called the “immune system” for the electrical system.

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.

Nissan Code P0603 Stored For ECM Back Up Circuit

The P0603 code deals with battery issues such as low battery voltage, discharged battery or battery terminal disconnections.

ECM and PCM Calibration Numbers

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

VIDEO: ECM Alternator Regulation; No More Full Field Testing

Andrew Markel explains how modern alternators are designed to have their loads regulated by the ECM, eliminating the need for full field testing. Sponsored by Auto Value and Bumper to Bumper.

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The Diagnostic Shell Game: Why The ECM Can’t See A No-Code Stalling Complaint

Remember the old carnival game where a dealer hides a pea under one of a half-dozen walnut shells? After the dealer artfully shuffles the six shells, you’re supposed to pick the shell with the pea hidden under it. Good luck with that. As veteran diagnostic technicians know, diagnosing a no-code intermittent stalling complaint can be like playing the old carnival shell game. We know it’s one of maybe six sensors, but why can’t we find the diagnostic trouble code (DTC) that tells us where to find the pea?

Outsmarting The Smart Cars: ECM Replacement

The ECM’s (engine control computer) function is to control emissions, monitor and regulate engine functions as well as optimize engine performance and fuel consumption.

ECM Diagnostics: Troubleshooting P1518 Codes

ECM diagnostics can be a challenge because you often find yourself working after the fact. As described in the July 2015 issue of Underhood Service (“The 1,300-Mile Test Drive”), a seemingly routine loss of power and a no-cranking, no-instrument cluster, no-scan-tool communication complaint on a 2003 GMC Yukon, VIN Z 5.3-liter flex fuel engine turned out to be a major Diagnostic Dilemma.

Audi Tech Tip: MIL On With P1545, P0121, P0123, P0221 Or P0222 Stored In ECM

The MIL is on, with a number of incident memory entries with regard to the throttle valve are stored in the ECM. In most cases, the entries are sporadic. This may be the result of contact resistance in the ECM wiring – throttle valve.

Tech Tip: Volkswagen Has MIL On, DTCs P1355, P1358, P1361 or P1364 Stored in ECM Fault Memory

This tip is associated with 2002-’04 2.0L Golf, Jetta, New Beetle and New Beetle Convertible vehicles.