Any way to trick the TPMS? - JeepForum.com
 
LinkBack Thread Tools
post #1 of 7 Old 02-20-2020, 05:32 PM Thread Starter
AndyWood
Registered User
2007 WK 
 
Join Date: Nov 2019
Posts: 27
Any way to trick the TPMS?

The winter tires are perfectly inflated, but sensors are reading from 0 - 35 for the 4 tires. Anyway to dismiss this, or trick it into thinking the sensors are reading good values? (pull a fuse, etc?)

thanks!

AndyWood is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 02-21-2020, 01:40 PM
90grandoneer
Moderator
 
90grandoneer's Avatar
2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 3,880
I don't know of any way to "trick" the TPMS, but they're not rocket science to troubleshoot and fix. The three main components are the trigger units (all wheels but the left rear), the sensors in the wheels (all 4 or 5), and the Wireless Control Module located under the dash on the driver's side. All can be easily checked (and serviceablitlity verified) with a good (not cheapo) scanner and a TPMS Service Tool. Any tire shop worth their salt should have these tools and be able to tell you where the problem is located in about 10 minutes.

06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, AFE Air Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS and HP tuners, Transgo Shift Kit, ARH Long Tube Hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam w/6* advance/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, TEA ported/milled heads w/new valve seats, SRT Reps with 265/45&295/40X20's. Also 05 Hemi LX modded exactly like WK and Comp Cammed 06 300CSRT8.
90grandoneer is offline  
post #3 of 7 Old 02-21-2020, 09:57 PM
CommanderRandy
Registered User
2007 XK Commander 
 
Join Date: Nov 2019
Posts: 63
Quote:
Originally Posted by 90grandoneer View Post
I don't know of any way to "trick" the TPMS, but they're not rocket science to troubleshoot and fix. The three main components are the trigger units (all wheels but the left rear), the sensors in the wheels (all 4 or 5), and the Wireless Control Module located under the dash on the driver's side. All can be easily checked (and serviceablitlity verified) with a good (not cheapo) scanner and a TPMS Service Tool. Any tire shop worth their salt should have these tools and be able to tell you where the problem is located in about 10 minutes.

Can you explain the "no trigger unit" on the left rear? My Commander thinks there's no left rear wheel back there and I'm getting sick of that stupid light

Previous Jeeps: 89 YJ, 92 YJ, 99 XJ, 98 XJ
Current Jeep: 07 XK Commander limited w/HEMI
CommanderRandy is offline  
 
post #4 of 7 Old 02-22-2020, 09:13 AM
90grandoneer
Moderator
 
90grandoneer's Avatar
2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 3,880
Quote:
Originally Posted by CommanderRandy View Post
Can you explain the "no trigger unit" on the left rear? My Commander thinks there's no left rear wheel back there and I'm getting sick of that stupid light
From the Factory Service Manual:

"A transponder is located in three of the four wheel wells of the vehicle to provide the WCM/SKREEM with the location of the tire pressure sensors on the vehicle. The transponders are located in the left front, right front and right rear wheel wells. A fourth transponder is not necessary in the remaining wheel well due to the process-of-elimination theory. Once the system knows the location of the first three sensors it assumes the location of the fourth tire pressure sensor is in the left rear tire."

06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, AFE Air Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS and HP tuners, Transgo Shift Kit, ARH Long Tube Hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam w/6* advance/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, TEA ported/milled heads w/new valve seats, SRT Reps with 265/45&295/40X20's. Also 05 Hemi LX modded exactly like WK and Comp Cammed 06 300CSRT8.
90grandoneer is offline  
post #5 of 7 Old 02-23-2020, 08:03 AM
NevadaWheeler
Registered User
2005 WK 
 
Join Date: Nov 2019
Location: Reno
Posts: 35
Quote:
Originally Posted by 90grandoneer View Post
From the Factory Service Manual:

"A transponder is located in three of the four wheel wells of the vehicle to provide the WCM/SKREEM with the location of the tire pressure sensors on the vehicle. The transponders are located in the left front, right front and right rear wheel wells. A fourth transponder is not necessary in the remaining wheel well due to the process-of-elimination theory. Once the system knows the location of the first three sensors it assumes the location of the fourth tire pressure sensor is in the left rear tire."

Does that mean that it doesn't look at the spare tire? I just had a flat yesterday (front right) and put the spare on. I still have the TPMS light, but I thought that was because the tire, now in the spare location, still was flat.
NevadaWheeler is offline  
post #6 of 7 Old 02-23-2020, 11:36 AM
90grandoneer
Moderator
 
90grandoneer's Avatar
2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 3,880
The first thing I'd do is check to make sure all of your TPMS Sensors, especially the spare, are still working. For each wheel equipped with a sensor, a TPMS Service Tool will, at a minimum, tell you the ID number, radio frequency, battery status, air temp. in the tire, and actual air pressure for that wheel. This should be the first thing you should check and. if the sensors are all good, check to see if the pressures are within the "Placard Pressure Threshold." Many times, folks will leave the sensor out of the spare, or the battery could be dead in it. Here's a little more from the FSM:

"The wheel sensor shall monitor tire pressure, air temperature inside the tire, wheel acceleration and the sensor internal battery status for all four active road tires and the spare tire, if so equipped. The sensor will broadcast this information, along with a unique 32 bit ID, to a central receiver circuit located inside the WCM. The information received by the WCM will be decoded and stored in (RAM) memory in the WCM. The WCM will send bus messages to the re-configurable display module to display the pressures of the four active road tires in vehicle position. The spare tire pressure is monitored but it is not displayed."

"The WCM shall continuously monitor for the receipt of tire pressure RF message transmissions from the wheel sensors during both the ignition key "on" and key "off" cycles. The wheel sensor IDís and the location of each sensor (e.g. Left Front, Right Front etc.) are stored in the WCM non-volatile memory during the initial Manufacturing Plant Process, or during a service procedure, as required."

06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, AFE Air Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS and HP tuners, Transgo Shift Kit, ARH Long Tube Hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam w/6* advance/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, TEA ported/milled heads w/new valve seats, SRT Reps with 265/45&295/40X20's. Also 05 Hemi LX modded exactly like WK and Comp Cammed 06 300CSRT8.
90grandoneer is offline  
post #7 of 7 Old 02-25-2020, 03:21 PM
CommanderRandy
Registered User
2007 XK Commander 
 
Join Date: Nov 2019
Posts: 63
This is great info, thanks.

Previous Jeeps: 89 YJ, 92 YJ, 99 XJ, 98 XJ
Current Jeep: 07 XK Commander limited w/HEMI
CommanderRandy is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome