Display tire temps on a 982 Cayman?

[blueline]

@CarBot

Question from J-Dub:

Is there a way to display my tire temperatures on my TPMS screen on a Porsche 982 Cayman?

[CarBot]

Question from J-Dub:

Is there a way to display my tire temperatures on my TPMS screen on a Porsche 982 Cayman?

On the 982 Cayman (718), the factory TPMS system only reports tire pressure (and will infer warnings based on pressure loss). It doesn’t have actual temperature sensors in the tires, so there isn’t a built-in way to add a tire temperature readout to the TPMS screen via coding or a menu change.

If you want real tire temps, you’re generally looking at an aftermarket solution like an IR pyrometer (quick checks in the paddock) or a motorsport-style TPMS/telemetry kit that includes temp-capable sensors and its own display/app. Those won’t integrate into the Porsche PCM/cluster TPMS page in any clean OEM way.

If you tell me your model year and whether this is for track days or just street monitoring, I can point you toward the most practical option people are using on the 718 platform.

[blueline]

@CarBot

Ahhh, but the sensors do read tire temps!

See J-Dub's post here:

viewtopic.php?p=56672#p56672


Not easy to read (can you enlarge the shot CarBot?), but here's the screen shot of data the TPMS are producing:

IMG_6302 (rotated).jpeg (2.48 MiB) Viewed 491 times

[CarBot]

Ahhh, but the sensors do read tire temps!

See J-Dub's post here:

viewtopic.php?p=56672#p56672


Not easy to read (can you enlarge the shot CarBot?), but here's the screen shot of data the TPMS are producing:

IMG_6302 (rotated).jpeg

You’re right that the wheel electronics can report a temperature value. Your screenshot is from a scan tool “data stream” view (looks like a Launch tablet) showing “Wheel electronics 01-04 last temperature value” around 93-106F.

What I’m not aware of is any factory way to display those temps on the PCM/cluster TPMS screen on a 982. Porsche seems to keep the driver-facing TPMS display to pressures and warnings, even though the control unit has more parameters available over diagnostics.

On enlarging the shot: I can’t actually enhance the original attachment beyond what’s there, but I can read it well enough to confirm it’s showing last temperature values for each wheel electronics channel. If you can upload the original, unrotated, higher-resolution image (or a direct screenshot export from the tablet), it’ll be easier to read the labels and units cleanly.

If the goal is “see tire temps while driving,” the practical options are either running a scan tool/app that can display the TPMS live data stream, or going aftermarket with a system that has its own display. If someone has found a PIWIS coding tweak that exposes temps in the cluster on 982, I haven’t seen it yet on Carpokes. If you link the exact tool/app J-Dub is using, I can help figure out whether it can do a live dashboard view versus just the data stream page.

[blueline]

@CarBot

J-Dub is using Launch X431.

I'll let him take over this conversation from here.

[CarBot]

J-Dub is using Launch X431.

I'll let him take over this conversation from here.

Got it. With the Launch X431, J-Dub can definitely view those “last temperature value” PIDs in the TPMS/wheel electronics module, and in many cases you can pin PIDs to a custom live-data dashboard so it’s easier to read than the raw list.

What I still don’t see a path for is pushing that temperature value into the factory PCM/cluster TPMS screen on a 982. Even though the module has the data, Porsche doesn’t expose it in the driver UI.

If J-Dub wants to keep it simple for track days, the most practical setup is using the X431 live-data dashboard (or recording a session) and treating it as “tire temp trend” rather than true tread-surface temp. Those sensor temps are typically internal/air or sensor-body temp, so they lag what you’d measure with an IR probe across inner/middle/outer tread right after a hot lap.

If J-Dub jumps in with the exact module path he’s using on the X431 (TPMS vs “Wheel electronics” vs gateway), I can help confirm which PIDs to watch and whether they update continuously while driving or only refresh after a wake-up/event.

[blueline]

J-Dub is using Launch X431.

I'll let him take over this conversation from here.

Got it. With the Launch X431, J-Dub can definitely view those “last temperature value” PIDs in the TPMS/wheel electronics module, and in many cases you can pin PIDs to a custom live-data dashboard so it’s easier to read than the raw list.

What I still don’t see a path for is pushing that temperature value into the factory PCM/cluster TPMS screen on a 982. Even though the module has the data, Porsche doesn’t expose it in the driver UI.

If J-Dub wants to keep it simple for track days, the most practical setup is using the X431 live-data dashboard (or recording a session) and treating it as “tire temp trend” rather than true tread-surface temp. Those sensor temps are typically internal/air or sensor-body temp, so they lag what you’d measure with an IR probe across inner/middle/outer tread right after a hot lap.

If J-Dub jumps in with the exact module path he’s using on the X431 (TPMS vs “Wheel electronics” vs gateway), I can help confirm which PIDs to watch and whether they update continuously while driving or only refresh after a wake-up/event.

Great info and you are correct in that the devices are measuring internal temps rather that actual tread temps.

[CarBot]

Great info and you are correct in that the devices are measuring internal temps rather that actual tread temps.

Yep, that’s exactly how I’d treat those values on a 982: useful for trends and for spotting an outlier corner, but not a substitute for a quick inner/middle/outer tread check with a probe right after a session.

As far as getting those temps onto the factory TPMS screen in the cluster/PCM, I still don’t know of any supported coding path on the 982 that exposes them. The wheel electronics module can broadcast and report a “last temperature value” over diagnostics, but Porsche doesn’t seem to surface it in the driver UI.

If J-Dub wants something readable in-car without adding hardware, the best bet is usually staying in the Launch X431 and setting up a live-data dashboard with the four wheel temp PIDs and pressures on one page, then logging a run. If he can share which control unit he’s entering on the Launch (TPMS vs Wheel Electronics vs Gateway) and whether the temps update continuously while rolling, we can confirm the best PID set to watch.

[J-Dub]

@CarBot
Here is an example of the data stream as viewed on my Launch X431

IMG_6304.jpeg (2.36 MiB) Viewed 469 times

[CarBot]

Here is an example of the data stream as viewed on my Launch X431

IMG_6304.jpeg

That’s a great example, and it confirms what you were seeing earlier. In your Launch X431 you’re in the Tire Pressure Monitoring System module, and it’s reporting for “Wheel electronics 02” things like current wheel position (Front Left), last temperature value (82.4°F), last tire pressure value (2.5 bar), remaining life span (127 months), and the setpoint pressure (2.1 bar).

So yes, the module clearly has a temperature parameter available over diagnostics. The sticking point is still the same: I don’t know of any supported way to make the factory PCM/cluster TPMS screen on a 982 display that temperature value. Porsche appears to keep the driver UI limited to pressure and warnings even though the ECU exposes more data to scan tools.

If your goal is to use this on track, the most practical “no extra sensors” approach is to use the Launch itself as the display. On that screen you can usually hit Graph or Record and see whether the temp updates continuously while driving or only refreshes periodically. If it updates well, you can treat it as an internal/sensor-body temp trend and use it to spot an outlier corner, then still do a quick probe/IR check in the paddock for true tread temps.

If you can confirm whether those “last temperature value” numbers change live while rolling (and how fast they refresh), that’ll tell us how useful it is as an in-car tool.