Gm Obd1 No Communication. Sep 5, 2004 · 1994 vehicles equipped with the early OBD II systems

Sep 5, 2004 · 1994 vehicles equipped with the early OBD II systems include Buick Regal 3800 V6, Corvette, Lexus ES3000, Toyota Camry (1MZ-FE 3. Feb 17, 2014 · 2007 Silverado, 5. Went to Engine Control Module and disconnected X1 and probed pin 39 & 40 directly… Nov 29, 2022 · I have a 2006 Chevrolet C5500 LLY/ Allison , motorhome application, that is in derate mode due to communication issues between ecm and tcm. This interface and data protocol does not allow for two way commutation with the ECU. OBD2 port but scanner does not connect. 5 that i know of. Jan 27, 2020 · The suggestion got me thinking. Jun 17, 2025 · Any scanner attached to the OBD1 port will have to have its own power supply, unlike the OBD2 port which does have it. Anyway I used the ole school paper clip flash method and its shooting code 13 which is o2 sensor. PIN 1 IS A 3. eghpndx
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