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Tech II not communicating

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Old Mar 31, 2021 | 08:31 AM
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Default Tech II not communicating

At the dealer for my friend to turn off F45.
I'm not allowed in the service area. Go figure
But he just said it's not communicating with the module. i told him to look and see if it had already been disconnected, any other ideas if its connected and not communicating somewhere else?
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Old Mar 31, 2021 | 12:06 PM
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Make sure you have 12 volts at pin 16 at the DLC...a serial data issue can also cause no comms with all the modules ??...the dealer can’t figure this out ???
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Old Mar 31, 2021 | 12:12 PM
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I left the car and told them to call me.
agreed, a dealer mechanic should not need me to research
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Old Mar 31, 2021 | 12:13 PM
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Originally Posted by cmc76
i left the car and told them to call me.
Agreed, a dealer mechanic should not need me to research

unbelievable !!!!!
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Old Mar 31, 2021 | 10:43 PM
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GM hides the fuse to the 0BD2 port on the cigarette lighter circuit---Chances are if use use the cig lighter for device battery charging the fuse is burnt and it will not communicate
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Old Mar 31, 2021 | 10:55 PM
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In the end he got it. All the f45 stuff is gone.
on to the abs and TCS codes.
also,, the brand new window switch I put in the other day that worked isn't working.
project for the weekend. Likely unrelated
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