Problem training new TPMS sensors

[McSquashy]

I need to preface by mentioning that about a month ago I started getting random faults from the TPMS sensor on the driver's rear tire. It would fault about once or twice a day then go back to normal. I wasn't too concerned because I was about to switch out rims, tires and TPMS sensors anyways.

Last week I got around to installing my four new wheels, tires, and the fresh set of Ford TPMS sensors that came with my Rally wheel kit.

The included Ford TPMS sensors came with a training device. Since these sensors didn't automatically connect like my last new set did, I put the car into training mode and attempted to assign the new sensors using the supplied tool.

I've attempted the training 5 times and every time the first three sensors connect flawlessly, but the last, the driver's rear tire, refuses to connect. Being that it's a different sensor, I'm thinking that there's another issue. My first thought is that there's something interfering with the signal from that sensor location, but there's nothing new in my MME that I can think would do that.

Does anyone have any troubleshooting ideas? Could this be an issue with a module or does it sound more like a bad sensor? It would be quite the coincidence if it were another bad sensor in the same corner.

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[GreaseMonkey]

There’s no training required. I noticed that the new set will take a bit longer to be recognized by the car, like 20 miles or so. Just be patient.

 

[McSquashy]

There’s no training required. I noticed that the new set will take a bit longer to be recognized by the car, like 20 miles or so. Just be patient.

Yeah, that's how my last set connected but it's now been 4 days and about 100 mi and they still haven't connected.

 

[GreaseMonkey]

Yeah, that's how my last set connected but it's now been 4 days and about 100 mi and they still haven't connected.

Are the TPMS the right frequency? The tool will not do anything. I tried the tool as well. Something is wrong.

 

[McSquashy]

Are the TPMS the right frequency? The tool will not do anything. I tried the tool as well. Something is wrong.

They're the same model and frequency as my other three sets.

The tool worked fine for the other three tires and sensors. It's just that one corner that won't connect.

 

[Mach-Lee]

Try starting the training with the bad sensor (wrong order) and see if it works or not. If not, then you might have a bad sensor. Sometimes you get a dud.

 

[McSquashy]

Try starting the training with the bad sensor (wrong order) and see if it works or not. If not, then you might have a bad sensor. Sometimes you get a dud.

Thanks, I'll give that a shot.

A bad sensor would make sense, just very odd it's the sensor in the same corner as the previous sensor that kept faulting.

 

[CoyoteMach]

It's a but of work, but since the tires are new, swap the LR tire with any one of the other tires. Then see what happens. If the 'bad' tpms connects in another location and the known good tpms will not connect in the LR location, then you have your answer... bad sensor.
On the other had, if the 'bad' tpms won't connect in the new location, then the new tpms sender is bad.

 

[McSquashy]

It's a but of work, but since the tires are new, swap the LR tire with any one of the other tires. Then see what happens. If the 'bad' tpms connects in another location and the known good tpms will not connect in the LR location, then you have your answer... bad sensor.
On the other had, if the 'bad' tpms won't connect in the new location, then the new tpms sender is bad.

Oh, that's a good idea. I'll swap driver's front and rear wheel locations and try using the training tool again.

So if the "bad" sensor connects in the new location and the known good sensor won't, what exactly does that mean again?

 

[CoyoteMach]

So if the "bad" sensor connects in the new location and the known good sensor won't, what exactly does that mean again?

It means that the sensor located in the left rear wheel well has a problem... corrosion, broken wire, bad sensor, ???

 

[McSquashy]

It means that the sensor located in the left rear wheel well has a problem... corrosion, broken wire, bad sensor, ???

Interesting. I wasn't aware there was a receiver unit in each wheel well. If that is the problem, I hope it's not an expensive fix.

 

[McSquashy]

Here’s where things currently stand with my TPMS issue:

Attempts to manually sync the sensors using Ford’s sync tool consistently fail because the driver’s rear sensor won’t sync. Even when the other three sensors sync successfully, the system won’t save any of them if one fails. I’ve also tried swapping tire positions, but the same corner still won’t sync.

Today, while driving, I noticed that all sensors except the driver’s rear had automatically synced at some point.

I could take it to the dealer, but my preferred one is an hour away, and arranging service is inconvenient. Plus, I prefer to work on my vehicles myself whenever possible.

From what I understand (based on replies to this post), there are four receiver units—one at each corner—that pick up signals from their corresponding tire pressure sensors. It seems likely that the receiver at the driver’s rear has failed. Does that sound accurate?

 

[RickMachE]

Pretty clearly, yes.

 

[mcg]

I have an intermittent fail from the rear drivers side as well. Hope to hear of a resolution to this.

Here’s where things currently stand with my TPMS issue:

Attempts to manually sync the sensors using Ford’s sync tool consistently fail because the driver’s rear sensor won’t sync. Even when the other three sensors sync successfully, the system won’t save any of them if one fails. I’ve also tried swapping tire positions, but the same corner still won’t sync.

Today, while driving, I noticed that all sensors except the driver’s rear had automatically synced at some point.

I could take it to the dealer, but my preferred one is an hour away, and arranging service is inconvenient. Plus, I prefer to work on my vehicles myself whenever possible.

From what I understand (based on replies to this post), there are four receiver units—one at each corner—that pick up signals from their corresponding tire pressure sensors. It seems likely that the receiver at the driver’s rear has failed. Does that sound accurate?

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