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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Trans temp, IAT, and MAP

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Author Topic: Trans temp, IAT, and MAP
sonsalla1
Member
Posts: 5
Post Trans temp, IAT, and MAP
on: August 18, 2013 (GMT)

Hello, just received my Bluetooth adapter yesterday and downloaded the app, have heard great things about it, and it works pretty well with the preset PIDS for ford(incl. Powerstroke). My issue is that I do not drive a 6.0, which most of the extended PIDs are for, I have a 97 F350 with 7.3L Powerstroke. I was wondering if anyone has found the PID # and equation to make trans temp(0-5v), intake air temp(0-5v), and MAP(hz) sensor readable with this app? I have searched on here and tried a few, to no avail, one actually made my truck cut out and surge at certain speeds, deleted it right away. I know they are read by the PCM as I can see and watch and graph them on my Snap-On scanner so its just a matter of finding one that works. Don’t need ECT or Low Pressure Oil Pressure, because there’s not even PCM sensors for them, they just go straight to the gauge cluster. APP would be handy too to diagnose dead spots in the pedal(common issue once they get higher in mileage) but not neccisarily needed. If I can provide any information just let me know to get this worked out.

Just some info I found on the MAP sensor:
Frequency 111hz = 14.7PSIA.
130=20
167=30
203=40

Thanks for any help

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: August 18, 2013 (GMT)

Some 7.3’s have been known to experience
problems with their ecus with certain OBD
diagnostic commands causing engines to shutdown.
So please test your PIDs with engine off key on until
you know its safe.

When you create an extended PID there is a button
on the bottom of the editor screen which will test
the PID for a successful response. Can you post
the response data for the following…

2211BD Trans Temp Input (Volts)
22114A Intake Air Temp Input (Volts)
221452 MAP (Hz)

Does your Snap-On display give the
min and max units for the inputs?

Please read… (page 1 maybe useful as well)

http://torque-bhp.com/forums/?wpforumaction=viewtopic&t=3673.1

sonsalla1
Member
Posts: 5
Post Re: Trans temp, IAT, and MAP
on: August 18, 2013 (GMT)

Scanner only reads min/max of the data for the session it’s in, not the min and max the ecm will read. I will try the trans temp code in the other thread, but it’s the same as one of the pre loaded ones. The problem is that 94.5-95 ecm’s, 96-97 ecm’s, e99, and 99-03 ecm’s have different programming and use different some different sensors, my truck for example doesn’t have a manifold temp sensor to read the incoming air post turbo that the super duty engines have, only intake air temp in the air box. I am new to all of this programming stuff so if it takes me a little bit please bare with me. With trying those other codes you posted above what are the other values that are supposed to go with them or do I just put that in and see what I find?

sonsalla1
Member
Posts: 5
Post Re: Trans temp, IAT, and MAP
on: August 18, 2013 (GMT)

Everything but trans temp came back as no data. Trans temp came back with response of 7F2216470012 and 7F2216740012 for the two methods pre loaded in the Ford bundle, one of which is the one you mentioned trying.

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: August 18, 2013 (GMT)

It was a longshot… sorry they didn’t work
for you. Will keep looking.

The trans temp PID is the same but header
was different.

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: October 13, 2013 (GMT)

just adding another request for a MAP sensor PID for the 97 7.3.
the newer ones use a V apparently and ours use a freq

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: October 16, 2013 (GMT)

Just curious…

Has anyone tried the given MAP pid 221452 using
header C410F1?

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: December 30, 2013 (GMT)

Quote from Capp777 on October 16, 2013
Just curious…

Has anyone tried the given MAP pid 221452 using
header C410F1?

it gives a response. KOEO it gives 6214526E8E, the last 2 digits change to 9e,d1, KOER the last 3 or 4 change.

sorry I have no clue what I am doing :) but I want my MAP to read

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: December 30, 2013 (GMT)

Just guessing here…

((A*256)+B)*0.000512

to see if it will match baro
at KOEO.

Edit:

Hope someone tries the other pids
using the C410F1 header as well.

2211BD Trans Temp Input (Volts)
22114A Intake Air Temp Input (Volts)

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: December 30, 2013 (GMT)

:) I did that math too

I doubt we get that lucky.
from what I read the freq drops as pressure rises.
and atmo is at 111hz

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

Actually need raw test response data
from two known pressures to calculate
slope and intercept. (KOEO being one).

The first post suggested Hz increases with
higher pressures?

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

boost does increase the value.i woild have to rig up a pressure reg to give real data.

i did the. 005… multiplier -14.7 amd it reads about 132. seems to rise 40ish when i try and hold 10psi and reaf gauge.

will dig around my junk for a reg

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

Your multiplier should be 0.000512.
Three zeros after the decimal.

Your reading will be influenced by weather
and elevation changes as the atmospheric
pressure changes.

I would try to match your baro gauge
on a normal weather day with KOEO by
changing your multiplier as needed, e.g.,
0.000549.

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

the multiplier I used was .0051939792
it was a fair way off the mark on the high side

car gauge pro has working gauges for both the freq, which read right at 111 at idle, and a functioning boost gauge for my truck. it seems to max out in the 30# area and start reading strange, so I think my turbo pushes the MAP out of range
so I might look to rob the formula from that app or just switch to it as Torque doesnt seem to support my vehicle as well.
the other app does all the self tests and injector buzz test.

playing with it just now blew the boots off the tubing and I ran over a clamp, so that ended tonight play session

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

Since you have an easy way to measure frequency
maybe getting the Hz readings correct first would
be the easiest way to go.

You could then use the data from the first post to
apply scaling to the Hz reading.

psia = (Hz * 0.274372338) – 15.73537459
Hz = (psia * 3.644682286) + 57.35044103

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

that would assume the data in the first post was accurate. as the MAP does not read over mid 30psi I find the info suspect

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: December 31, 2013 (GMT)

I have found other references that match his
posting.

Your vehicle sensor should produce ~203 Hz at 40 psia
276 kPa. This is an operational check point listed
for the 7.3 sensor.

Since Boost equals MAP – Baro, your pressure
exceeded 40 psia IMO when your boost gauge topped
out at 30 psi.

Trouble code is set when Hz > 256 for more
than 0.1 seconds.

Edit:

For KOEO reading 14.7 and with a boost reading
of 10 then MAP would be 24.7 psia.

Since you seem to be reporting x10 then you should
be looking for a difference of 100 at KOEO with a
boost reading of 10 using the correct multiplier (span)
x10.

247 – 147 = 100 = Boost of 10 x10

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: January 3, 2014 (GMT)

can you link to the “operational check point” data?
I can try and find a pressure reg and map the MAP

I ordered a pressure relief valve to see if I can vent excess pressure off the MAP line to prevent it from going out of range
my turbo should put about 50-60psi in to the manifold

Capp777
Member
Posts: 2913
Post Re: Trans temp, IAT, and MAP
on: January 3, 2014 (GMT)

Without specific numbers like your
Car gauge max MAP hz reading or the high
psia values you are getting in your previous
posting… there’s not much I can do to help.

Google search “111 hz 14.7 7.3 Map” for the
operational checkpoints you seek. They are
the same as the first posting.

I believe logging your car gauge Map Hz and
boost and rpms while you are running engine
may be all that is required to figure this out using
the equations I provided earlier.

55 psia would be over 256 Hz which should trigger
a fault.

m j
Member
Posts: 92
Post Re: Trans temp, IAT, and MAP
on: January 3, 2014 (GMT)

ok so your 40psia is only 25.3psi gauge. I dont think that fault code does anything but I will see if I can vent the MAP line under it when the parts arrive.

anything over 36psi gauge confuses the motor and it ‘stumbles’ violently.
you want me to peg the MAP and see if it saves a max Hz reading?
high PSI value are useless as I have seen it display 2376 when it goes nuts.

your IAT returns a response with your alternate header. 62114a8e80 – 62114a8ec0 was the range I saw. last digit seemed to stay 0 if that means anything

I do not have a trans temp sender so I cannot test that one for you

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