Reading TPM via OBD2?

I think Gen4 works similar to Prius Prime. I used OBDLink LX with TireAssistant to read out TPMS values. I have read Carista app offers this functionality, but I did not find TPMS reading on my Carista App subscription. I might have read somewhere Torque paid app has TPMS, but have not confirmed this. The free version did not have it. AFAIK, those OBD apps can read TPMS data via OBDII but not while the car is in the drive. If you need to see real-time tire pressure during driving ScanGaugeII will display it with a special PID (X-Gauge programming necessary). Techstrem also shows TPMS data, but again not during the drive. In the end, I decided to use cheap external TPMS sensors and on dash reader to monitor the real-time tire pressure on my PP.

 

Some scan gauge owners needed to mail their gauges back for an upgrade of some sort, in order to read tire pressures. I'd suspect in the process they would also add the XGauge. Not sure if that's still the case; maybe newly purchased scan gauge would have the pressure reading capability as/is?

 

Yeah, that's possible. I actually bought a brand new ScanGaugeII almost two years ago. But the list of PID on the manual did not have the TPMS reading for PP, not sure if it did for Gen4. On their website, they specifically list X-gauge procedure for the PRIME that needed to be programmed on a new gauge with at least 4.5+ firmware update. Toyota Specific XGauges

But after receiving the gauge, I realized that I had to sit in a car with the gauge plugged into the OBDII to do any sort of manipulation on it. I was thinking I could do all the necessary set up on the gauge without going to the car, like sitting at my desk. At that point, I lost interest in playing with the gadget. I still have the brand new ScanGaugeII in the clamshell package never used. LOL

 

Mines getting dusty too. There was an apparent problem having it constantly plugged in: Check Hybrid System warning, brake related warning lights and work-to-rule brake system: the brakes worked but seemed "off", definitely not normal.

Dealership tech noticed sporadic cut-outs with techstream, suggested I try disconnecting it. Did the trick.

 

If Tire Assistant works, You can try PID's:

pressure (bar):
header:750, PID: 2130, start command: atcea2a\natta, stop command: atcea
calculation: X * 0.011859 + 0.35653
where X is A, B or C for first 3 tires

temperature (C):
header:750, PID: 2116, start command: atcea2a\natta, stop command: atcea
calculation: X
where X is A, B or C for first 3 tires

Problem is with reading of 4th tire - first line of transmission contains only data for tires 1, 2 and 3 and "Torque pro" I'm using reads olny 1st line by default.

Transmission in OBD terminal looks like this:

>atcea2a
OK
>atta2a
OK
>atar
OK
>atsh750
OK
>2130
007
0:6130ACACA9
>2116
007
0:6116403F3C


RAW data received should be like this:
758 2A 10 07 61 30 AC AC A9
758 2A 10 07 61 16 40 3F 3C

I know that data for last tire should start with: 758 2A 21.
Mabe someone have idea how to get data for last tire in app like "torque pro"?

 

Correction:

calculation for pressure should be: X * 0.0172 - 0.4829