Low battery now TPS not working
02-25-2011, 11:51 PM
#1
Pro
Thread Starter
Low battery now TPS not working
I was polishing my Grand Sport and listening to the radio while working. Apparently I drained the battery and the car would not start. I jump started it and let it run for 20 minutes. Now when I scroll through the information button, the tire pressure is reading 0 PSI on all 4 tires. Any ideas what to do other than go to the dealer? Thanks
02-26-2011, 06:28 AM
#2
Instructor
Member Since: Nov 2010
Location: Indianapolis Indiana
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I would try a reboot of all processors first. The low battery when you tried to start it may have locked up one of BCM micros. You will need to remove the negative battery terminal, wait a bit ( a minute or so ), then reconnected.
You will have to re-index the windows after that ( in owners manual ).
The fact that you lost all tire pressure readings would point to the processor responsible for that function.
You will have to re-index the windows after that ( in owners manual ).
The fact that you lost all tire pressure readings would point to the processor responsible for that function.
02-26-2011, 07:06 AM
#3
Safety Car
Member Since: May 2006
Location: Providence Forge, VA
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St. Jude Donor '08-'09-'10-'11-'12
Letting it run for 20 minutes will not begin to bring your battery back to full strength. Before doing anything else, I would recommend you get your battery up to full charge (or a new battery)using either a battery tender or a charger. Low batteries cause many seemingly unrelated gremlins, if you start chasing those rather than curing the low battery issue it won't get better. Start with a fully charged battery and go from there. You need to be driving the car to see if your TMPS is working correctly.
02-26-2011, 11:21 AM
#4
Race Director
with foremaw - you need to drive the car faster than 20 mph for a few minutes to wake up the sensors to get them to transmit the current pressure to the TPMS so it can display correctly in the DIC. Bob
02-26-2011, 01:07 PM
#6
Pro
Thread Starter
Thank you!
You guys know your stuff! I just took it on a 60 mile ride and a minute into the ride all pressures began to show 30 PSI. Thanks again for the help.
02-27-2011, 12:01 PM
#8
Burning Brakes
Letting it run for 20 minutes will not begin to bring your battery back to full strength. Before doing anything else, I would recommend you get your battery up to full charge (or a new battery)using either a battery tender or a charger. Low batteries cause many seemingly unrelated gremlins, if you start chasing those rather than curing the low battery issue it won't get better. Start with a fully charged battery and go from there. You need to be driving the car to see if your TMPS is working correctly.
Douglas in Green Bay
