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Author Topic: Transmission Temp Issue
Member
Posts: 25
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

@F-150Torqued,
The 40-50 degree difference between Torque and the dash gauge is for engine coolant temp – not the transmission fluid temp.

Capp777
Member
Posts: 2994
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

Torque is using A-40 °C for its GM TFT PIDs.

Byte A=3C which equals 60 decimal…

60-40= 20°C which equals 68°F in previous
posts.

F-150Torqued
Member
Posts: 437
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

Gotcha’. Ford uses that for IAT and a couple of things, but TFT is two byte A/D count thingy. Actually, being in South Texas I never had actually tried to convert -40 C to -40 F before just now. Lol. Told you guys I wasn’t too smart!

Member
Posts: 25
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

Ok, managed to check a few more things today. Was hoping to get TorqueScan results – I did get them on the phone, but could not email them. Got a message something like “Could not attach empty file”.

Using the Test option in the PID editor I came up with the following:

(First with the ‘atz’ (Very Advanced – ELM327 custom configuration string) under Vehicle Profile:

Testing PID with atz

Result for equation: 42

Command:
221940

Start Diagnostic Response:
3E00
7F 3E 00 11

Variables used in equation:
A=82(hex=52, binary=01010010)

Equation steps:
‘=A-40

Next with the ‘atz’ setting removed:

Testing PID without atz

Result for equation: 43

Command:
221940

Start Diagnostic Response:
6CF1187F3E001171

Response:
6CF1187F22194012F6

Variables used in equation:
A=83(hex=53, binary=01010011)

Equation steps:
‘=A-40

Capp777
Member
Posts: 2994
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

The 7Fxxxxxx responses are failed responses
from the TCM.

Did you ever test the 3F version of tester present
from earlier posts?

You didn’t give the response to the working
version of command using ATZ.

Member
Posts: 25
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

Quote from Capp777 on March 12, 2017
The 7Fxxxxxx responses are failed responses
from the TCM.

Did you ever test the 3F version of tester present
from earlier posts?

You didn’t give the response to the working
version of command using ATZ.

@Capp777, I stayed away from the 3F versions as there was mention about them possibly messing with the ECU, and I am not smart enough about all this to understand the possible impacts.

I don’t think there was a response from the setup with ‘atz’ entered, unless it was the ‘7F 3E 00 11’ info.

Capp777
Member
Posts: 2994
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

An after thought… if ATZ is getting your
custom pids to work, you might try creating
your own OBDII pids using 686AF1 as their

Engine Coolant example:

Mode/Pid: 0105
Equation: A-40
Units: °C

Engine Oil Temperature:

Mode/Pid: 015C
Equation: A-40
Units: °C

Engine RPMs:

Mode/Pid: 010C
Equation: ((A*256)+B)/4
Units: RPM

Your long names must be unique and
different than what Torque uses.

7F3E0011 means failed response to
3E00… mode not supported. Ian had
mentioned this in earlier post.

Member
Posts: 25
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

Here are the results showing the PID setup and the PID testing status. 2 PIDs were used – Transmission Fluid Temperature (GM Method 1 and 2).

First batch is the GM Method1 –
PID setup:
ODB2 Mode and PID without atz
221940
Long Name
Transmission Fluid Temp (GM Method 1)
Short name
TFT-GM1
Min Value
0.0
Max value
300.0
Scale Factor
x1
Unit type
°C
Equation:
A-40
6c18f1
Diagnostic start command
3E00

PID Test:
Testing PID without atz

Result for equation: 24

Start Diagnostic Response:
6CF1187F3E001171

Command:
221940

Response:
6CF1187F22194012F6

Variables used in equation:
A=64 (hex=40 , binary=01000000 )
Equation steps:
‘=A-40

========================================================
Now the same thing but with the ‘atz’ setting in Vehicle Profile.

PID test with ‘atz’:

Testing PID with atz

Result for equation: 35.0

Start Diagnostic Response:
3E00
7F 3E 00 11
Command:
221940

Response:
229140
7F 22 19 40 12
Variables used in equation:
A=76 (hex=4C , binary=01001100)

Equation steps:
‘=A-40

Next post will have the info for (GM Method 2)

Member
Posts: 25
 Re: Transmission Temp Issueon: March 12, 2017 (GMT)

GM Method2 –
PID setup:
ODB2 Mode and PID without atz
221940
Long Name
Transmission Fluid Temp (GM Method 2)
Short name
TFT-GM2
Min Value
0.0
Max value
300.0
Scale Factor
x1
Unit type
°C
Equation:
A-40
6c18f1
Diagnostic start command
07E2

PID test without ‘atz’:
Testing PID without atz

Result for equation: 24

Start Diagnostic Response:
6CF1187F07E21114
Toggled to – 6CF1107F07E21244
Command:
221940

Response:
6CF1187F22194012F6

Variables used in equation:
A=64 (hex=40 , binary=01000000 )

Equation steps:
‘=A-40

===================================
and with ‘atz’

Testing PID with atz

Result for equation: 36.0

Start Diagnostic Response:
07E2
7F 07 E2 11
Command:
221940

Response:
229140
7F 22 19 40 12
Variables used in equation:
A=76 (hex=4C , binary=01001100)
Equation steps:
‘=A-40

Member
Posts: 25
 Re: Transmission Temp Issueon: March 13, 2017 (GMT)

Quote from Capp777 on March 12, 2017
An after thought… if ATZ is getting your
custom pids to work, you might try creating
your own OBDII pids using 686AF1 as their

Engine Coolant example:

Mode/Pid: 0105
Equation: A-40
Units: °C

Engine Oil Temperature:

Mode/Pid: 015C
Equation: A-40
Units: °C

Engine RPMs:

Mode/Pid: 010C
Equation: ((A*256)+B)/4
Units: RPM

Your long names must be unique and
different than what Torque uses.

7F3E0011 means failed response to
3E00… mode not supported. Ian had
mentioned this in earlier post.

Do this mean to leave the ‘atz’ setting, and then create PIDs as above for the non-working ones to create a complete setup?

BTW, thanks to all for the help, greatly appreciated.

Capp777
Member
Posts: 2994
 Re: Transmission Temp Issueon: March 13, 2017 (GMT)

That’s what I was thinking…trying to get
the OBDII pids working with your ATZ
solution.

Please note that 07E0 and 07E2 are CAN

I suggest leaving the diagnostic commands
blank.

Edited.

Member
Posts: 25
 Re: Transmission Temp Issueon: March 14, 2017 (GMT)

Quote from Capp777 on March 13, 2017
That’s what I was thinking…trying to get
the OBDII pids working with your ATZ
solution.

Please note that 07E0 and 07E2 are CAN

I suggest leaving the diagnostic commands
blank.

Edited.

Excellent – I’ll give that a try the next time I have a chance to mess with the settings.

Thanks,

expressvan
Member
Posts: 2
 Re: Transmission Temp Issueon: January 18, 2023 (GMT)

Any luck with this in the end ?

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