Service TPMS

ruraldodge607 · Jun 21, 2020

Had this flash at me while driving on the highway, checked tire pressure screen and all 4 tires were "--". Parked and hit the lock on the fob, it didn't work even after mashing it a bit too. Did some shopping and same thing, unlock wasn't working. Pulled a code and got B1A76, "Remote Start Antenna Circuit Short circuit to ground". Was able to get to the RF Hub and re-seated connections and cleared the code but doing a test of the antenna circuits with Alfa they fail. I'm leaning towards the RF Hub being bad, anyone else have this type of issue?

Ricks Ram · Jun 21, 2020

Haven't seen this exact issue but the RF hub could well be the cause since it also reads the TPMS. Did you try a RF hub reset?

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ruraldodge607 · Jun 21, 2020

Only thing I haven't tried yet (I'm assuming you mean via Alfa?), I need to get my 4 digit pin from the dealer

Ricks Ram · Jun 21, 2020

ruraldodge607 said:
Only thing I haven't tried yet (I'm assuming you mean via Alfa?), I need to get my 4 digit pin from the dealer

Yes I mean using the Alfa. It may not work but it's worth a try. In your post you did say you have already checked the wiring and connections to the RF hub as much as possible correct?

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ruraldodge607 · Jun 21, 2020

Just what's behind the back seat and above the headliner (one of the antennas). Only strange thing I noticed was that the RFHub was next to a cabin vent that has lost all it's rubber. So there was extra dust and small debris back there, didn't notice anything on the hub that says nature broke it but it's not impossible I guess.

Randomly the lock unlock will work, tried remote start and it worked once. Attempts to use again it didn't start.

I'm also wondering if maybe it's a battery thing, though that doesn't explain it faulting out when running (I think). At sitting for an hour battery on the voltmeter said 12.4V...

ruraldodge607 · Jun 22, 2020

So seeing that cabin vent and then remembering I had a car wash the day before it went hay wire. I'm thinking water infiltrated the RF hub which is right next to the vent. Now that it's had time to dry it appears to be working just fine.

ruraldodge607 · Jun 22, 2020

Duplicate post.

Trotski · Aug 3, 2020

How did you clear the tpms and get it reading again as I'm getting the -- on all 4 tires

TankGsxr · Nov 8, 2021

Trotski said:
How did you clear the tpms and get it reading again as I'm getting the -- on all 4 tires

did you ever figure this out? i'm having the same issue.

Service TPMS

ruraldodge607

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Ricks Ram

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Ricks Ram

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