I will try to explain this in detail so I might get an answer as it is a mystery to me.
I switched wheels and tires (all 5 changed) off an 07 KJ to my 05 KJ. (OEM wheels and tires with the working TPM's attached) In the process of checking/airing up the tires I broke one of the valve stems (dammit) so I hung the tire with the busted stem and no air in it on the back. Started the jeep and no TPM warning or light or anything. This was on a sunday so the spare was just hanging on the back all day with no air and no TPS warnings. (??) As far as I know the system was working before I switched tires/rims.
I needed to get air in the spare so I was going to just take a TPM off one of the wheels I just took off, but didn't as I figured the batteries are getting old but went to the dealer the next day and got a new TPM for an 05 KJ ($54 bucks).......I installed it and aired up the tire.
So it is a mystery to me why the TPM system didn't go nuts. Pretty sure there was 2 different TPM systems used between 05 and 07 and my 05 has the basic one and not sure what one was in the 07 that the wheels/tires came off of. The only thing I can think of is that the ser # of the new TPM's need to be programmed to the BCM or something.......but it has been a couple of weeks now and no TPM lights or dings and I am pretty sure I am going to leave it alone as I check my tire pressure regularly anyway. But why didn't the system go nuts on me??
Thoughts?
Dave
I switched wheels and tires (all 5 changed) off an 07 KJ to my 05 KJ. (OEM wheels and tires with the working TPM's attached) In the process of checking/airing up the tires I broke one of the valve stems (dammit) so I hung the tire with the busted stem and no air in it on the back. Started the jeep and no TPM warning or light or anything. This was on a sunday so the spare was just hanging on the back all day with no air and no TPS warnings. (??) As far as I know the system was working before I switched tires/rims.
I needed to get air in the spare so I was going to just take a TPM off one of the wheels I just took off, but didn't as I figured the batteries are getting old but went to the dealer the next day and got a new TPM for an 05 KJ ($54 bucks).......I installed it and aired up the tire.
So it is a mystery to me why the TPM system didn't go nuts. Pretty sure there was 2 different TPM systems used between 05 and 07 and my 05 has the basic one and not sure what one was in the 07 that the wheels/tires came off of. The only thing I can think of is that the ser # of the new TPM's need to be programmed to the BCM or something.......but it has been a couple of weeks now and no TPM lights or dings and I am pretty sure I am going to leave it alone as I check my tire pressure regularly anyway. But why didn't the system go nuts on me??
Thoughts?
Dave
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