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International Automotive Technicians Network

Automotive Technical Discussion Forum

Professional automotive forum for all types of vehicle repair discussion that does not fit into one of our more specific technical forums. Discussions include both OBD and OBD2, engine performance analysis, diagnostic best practices, service information, vehicle standards such as J1962, J1939, J2534, OBD2 modes (e.g. MODE$06), ignition and fuel system analysis, alternative propulsion (e.g. hybrid, electric, natural gas), and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Theory Forum.

Recent Automotive Discussions in the Automotive Technical Discussion Forum

Axle bearing failure 1973 Landcruiser
05/20/2025 in the Technical Discussion Forum
This vehicle came in for a no brake situation. Ultimately, I discovered it had an overfilled rear differential that apparently has been through water. It uses semi floating rear axles, and the bearing surface on both axles are severely pitted due to corro...
Automotive Encyclopedia
05/17/2025 in the Technical Discussion Forum
Hello IATN members. Motor Services published this wonderful vehicle textbook. Although it is copyrighted in 1968 a great deal of the theory is applicable to modern vehicles. I highly recommend this textbook to anyone starting out that wants to enter the f...
2019 Ford 350 TPMS Confirgure / BCM
05/16/2025 in the Technical Discussion Forum
[Miscellaneous: 19 Ford F-350 Super Duty XLT 6.2L] B1255-51-48 , B124D:82, Codes Pretain too looking for TPMS Monitor on a Dual Wheel, This Truck is Single Rear wheel. I went through BCM PMI / and As Built , Reflashed and and still Coming up with Codes. ...
Intermittent Loss of Communication with PCM
05/14/2025 in the Technical Discussion Forum
[Driveability: 07 Chevrolet Tahoe LTZ 5.3L] This car has got me baffled. It intermittently loses communication with the PCM. When this happens, the gauges start to fluctuate or they don't move at all. The weird things is that is that when this happens, I...
Engine won't shut off with key
05/10/2025 in the Technical Discussion Forum
[Electrical: 02 Chevrolet Silverado 2500 HD LS 8.1L] Gentlemen, I have a headache here, looking for some help with this As stated above the engine won't shut off unless you remove the run/start relay or the ecm fuse. I looked at the pie for the ignition ...

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