I’m not 100% certain, but the PID you have may not be valid for the tacoma – the results of the test don’t match up with the maths (square peg, round hole type of situation)

Could someone try this:

PID: 2182
Equation: A-40
Units: C

and/or:

PID: 2182
Equation: C-40
Units: C

Posting the output from ‘Test’ would also be useful!
(going to get some sleep now so won’t be online for a couple of hours)

It’s a no-go on the 2182 pid. No response engine off or on.

Hi

Had a fresh look at this after some sleep, here is the new equation as far as I can see:

(((((E*256)+F) * (7/100) – 400)/10) – 32) * (5/9) – for output in C

((((E*256)+F) * (7/100) – 400)/10) – for output in F

There is a small bug in C / F conversion which means conversion will not happen unless you have the ‘degrees’ character in front of it. This will be fixed in the next update due out this weekend.

Does the tacoma have 2 temperature sensors on it’s transmission?

Ok, just ran some tests and I think you’ve nailed it.

I went out to my garage this morning, and connected without starting the engine. The temp gauge on the headliner said 65degF. Sent:

PID: 21D9
Result: 64.16
Response: 00A
0:61D900000000
1:3A203AC0000000

And at that point coolant temp read 64.4 deg F

Then I started the engine and headed out to my first errand of the day, the DMV. I took surface streets, travelling about 3.5 miles in 12the minutes. During that time, the transmission temp reading rose to 117.9 while the coolant temp rose to 186.8 degF and the ambient temp outdoors dropped to 59 deg F. When I parked, I left the engine on and got the following from the test command:

0:61D90E000000
1:58205AA0000000

I’ll keep an eye on it once I get out of here and head to next destination.

Highway numbers looked good, too. Once I got up to speed it hovered around 124 or so. Would rise up towards 140 on surface streets and go back to the 120’s when cruising again.

Sorry bout that, didn’t know.

{ed: please avoid posting things from other companies like this – it puts the app at risk, thanks!}

{ed: No real problem – dont want to tread on other people’s toes :)}

I’ll add a second PID and watch them side-by-side today if I can. I suppose if the G/H reading is fairly consistently higher, it’s bound to be the “b” sensor right before the cooler intake. I’m surprised the service manual doesn’t actually say where the “a” sensor is… suppose I’ll have to read the teardown section closer to be sure.

One question. The long name on the original PID is now grayed out and can’t be edited. Do I have to create a new PID to correct the long name, or can it be unlocked?

Based on the scangauge codes posted here, it looks like the 2010+ models might need the 2182 PID instead of 21D9…

http://www.tacomaworld.com/forum/2nd-gen-tacomas/102837-scangauge-ii-can-read-oil-pressure-5.html#post3916284

for 2010+ models the equation may be ((A *256) + B)(etc) and ((C*256)+D) from what I can see here.

From a diagram I have seen on the net, it would appear that sensor 1 is at the pan/collector/drain area, and sensor 2 is closer to where the work is being done (you should be able to verify this as the fastest changing sensor should be closer to where the work is done)