Gentlemen,

I have the TPMS warning alternating between all four tires. I have new sensors, installed by a certified JLR shop. My battery is at full charge. No codes show up. I have inflated the spare to specified lbs.
Based on searching the posts about TPMS I believe it needs a new module. However, no where can I find where this module is located. Behind the front seats is the only clue I have found. Can anybody show me what this module looks like and where it is.

2009 XK Coupe

Thanks Guys

 

I had that problem all last year, dealership even installed two different models in the tires.
Only thing that worked for me is I inflated each tire 4 lb's over the listed amount, now the TMP don't show up anymore, but the ride is a little stiff.
Friend of mine who also has a 2010 XK found a local shop that was able to disconnect his TMP system and solved his problem, may look at that next year when I wake her up from her winter nap.

 

I have the same issues - I bought a new tpms unit from the Jag dealer.
The unit on the coupe is behind the left rear seat. Haven't checked
what is involved in removing the seat yet. Must be in the manual.

 

Thanks JB....that may be on my list of options.

 

Hi Mc, are you going to change it yourself?

 

Yes, just looked in the service manual on how to remove the seat - looks pretty
straight forward.

 

Best O Luck,

Anxious to hear how you make out

 

I thought the module was under the center console.?

 

IIRC it's beneath the auxiliary junction box so if you remove the back seat center arm rest (pull up) then the center section of the back seat (pull up and out), you should see it. I don't think you need to remove the entire seat back though that only takes 5 minutes.

 

I have been getting intermittent tire pressure warnings for the past 6 months. I had to replace my battery two weeks ago and I have had no warnings since then. The old battery was always on the CTEK maintainer and I had no warning that the battery was on the way out until it would not crank the starter one morning.

 

Hi John,

thanks for your input. I am quite sure it is not the battery. The battery is less than one year old. I too have a CTEK charger and if the car sits for more than four days I put it on the charger.

Will letting the warning flash indefinitely will this cause further problems?

 

You can let it flash forever and the only problem will be the annoyance. You can always hit the little triangle on the touchscreen display to clear your dash display up. Mine has this same behavior periodically. I strongly believe that it is a weak ground(earth) point, since the problem seems to show up when I drive it in wet weather. It actually seems to work properly when kept dry.

 

Thanks 007,

Glad to hear it won't cause any problems. I know nothing about electrical but it seems that now the weather is getting colder it is coming on less frequently. I guess there is some consolation knowing a lot of Jaguars have this problem....I guess

 

This has nothing to do with the fact that the car is a Jaguar. It is entirely related to the tire pressure monitors themselves and these are mandated for use in all modern cars. We might as well say that it is a consolation to know that a lot of Mercedes, Maseratis, Bentleys…have this problem 😊

 

Just putting this out there--- I've had the TPMS warning for over a year tried all the fixes I've found online with none of them working ,6 months ago I changed all the sensors again still not the answer, Last week I used an Autel TPMS scanner and scanned all the wheel sensors. then used the scanner to program the sensors in the ECU making sure I got the completed phrase on the scanner. took the car out for a 20-mile run the light came on for about 30 seconds and went off. I have used the car for over 200 miles since and the light has not gone back on. It always was going on every 5 minutes prior to using the scanner. Our XK's are supposed to be install sensor and drive to turn the light off so therefore I'm hoping this is fixed so far, Its good

 

A review of how the TPMS works is provided in the shop manual: https://www.jaguarforums.com/forum/x...guides-215509/

TPMS module behind the RSJB provides an inniator signal at each wheel arch antenna in turn. Each wheel mounted sensor broadcasts its ID and pressure. Central antenna picks up the signal for the TPMS module which communicates to the Instrument Control Panel via CAN.

SDD Measurement functions provide data (ID and pressure) that my help diagnose the problem.

Intermittent failures are most likely the wheel mounted sending units (old or defective internal batteries), incompatible sending units (wrong model, works part-time).

TPMS module, wiring and connection failure is not likely to be intermittent. Usually a hard failure. (Squirrel ate wires, etc.)

As stated above, vehicle low battery voltage is a major source of XK gremlins. Use an inexpensive cigar lighter socket mounted volt meter to constantly monitor system voltage.

Unless you are working on a deep flood vehicle, TPMS intermittent faluts are located in the wheel sensor or ... the wheel sensor, unless it is the ... wheel sensor.

My experience has been that there are a lot of old new-old stock and partially compatible sensors out there.

Best bet: carry it back to the "jag" shop that installed the wheel sensors (after monitoring/making sure the vehicle voltage is always 13.5V or so when running.)

Please report back with your solution when you find it.

best regards,

Bill

PS: A replacement TPMS module (behind the RSJB) will require programming via SDD,

 

FYI. TPMS Reset Attached.

 

No one's mentioned this in this thread, though it's been covered in others. If your TPMS wheel receivers are original, they are 13 years old and the life expectancy is 7 years.

As I mention, there are several threads and most that address Seiman's VDO part numbers (now Continental VDO?) are old as well. My question is, would not the newer ones used in Land Rovers/ F-types with the same frequency be ok to use? and by ok to use, I mean they don't require programming similar to Seimans. Install and drive, etc... Anyone done this?

 

Thanks Bill 400,

I have sent your analysis to the shop that installed my sensors. I'll let you know what they find out.

I appreciate your input

 

Yes. 315mhz in USA. If you find the appropriate part, It works like a charm.
But all of my XK modules have the latest software.