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View Full Version : How do i setup my PIDs to log?



RyanU
September 4th, 2008, 10:35 AM
I have autometer 2246 transducers, wiring harnesses and plugs. ill be using these to monitor drive pressure boost and boost pressure. what are the steps i need to take to logs these and log them in psi?

joecar
September 4th, 2008, 12:18 PM
Is the output range of your transducers 0V to 5V...?

Can you provide some psi/kPa sample points for various voltages in this range...?
0V == what psi
5V == what psi
Is the output linear wrt pressure...?

You provide 5V power/ground to power the transducer (I assume);
you connect the transducer output/ground to the FlashScan input/ground;

From the voltage/psi relation, we can make a calculated pid for this.

Depending on you car year/model, if you delete the EGR you can use the EGR circuit and the EGR voltage pid.

Do you have FlashScan V1 (LEDs only) or FlashScan V2 (LCD and LEDS)...?

RyanU
September 4th, 2008, 12:38 PM
ok i have them showing up in the pids i now need a PRN number for my second input.

i have both a v1 and a v2 ill be most likely using the v1 on my truck

the voltage on it is like what others had in other posts i think its .5-4.5

i have attached my calc_pids file for you all to see what else i need to do

also when the PIDs show up they say they are invalid, however i do not have them hooked up yet. does that make a difference?

TAQuickness
September 4th, 2008, 07:38 PM
When a PID shows as invalid, right click it and select "more info..." The resulting dialog will tell you whats missing.

RyanU
September 4th, 2008, 11:50 PM
this is what i see

Boost Pressu {CALC.BP}

Expression:
PSI = ({EXT.AD2}*25)-12.5
is NOT valid because:
Required parameter {EXT.AD2}, at position 11 is not selected.

PID value cannot be determined because
the following error would occur:
Expression not valid: Required parameter {EXT.AD2}, at position 11 is not selected.

RyanU
September 4th, 2008, 11:51 PM
this is the other one

Drive Pressure {CALC.DP}

Expression:
PSI = ({EXT.AD1}*25)-12.5
is NOT valid because:
Required parameter {EXT.AD1}, at position 11 is not selected.

PID value cannot be determined because
the following error would occur:
Expression not valid: Required parameter {EXT.AD1}, at position 11 is not selected.

RyanU
September 4th, 2008, 11:52 PM
this is my calc pids file

# ================================================== ============================
# File details
# ------------
#
# This section defines various details about the file format.

*FILE

#Parameter Value Description
#---------- ---------------- ---------------------------------------------------
VERSION 7.1.1 File version
DECSEP . Decimal separator used in this file

# ================================================== ============================
# Units
# -------------------
# See sae_generic.txt for more information on the *UNITS section

*UNITS

#Code System Abbr Description
#-------- ---------- -------- -------------------------------------------------------------

PSI Imperial PSI "Pounds Per Square Inch"

# ================================================== ============================
# Add slot definitions here
# --------------------------------
# See sae_generic.txt for more information on "SLOT" formats
#
#Units Low High Fmt Expression
#------------ ------------- ------------- ---- --------------------------------------------------------------

*CLC-00-001
PSI 0.00 100.00 .2 "({EXT.AD1}*25)-12.5"
*CLC-00-002
PSI 0.00 100.00 .2 "({EXT.AD2}*25)-12.5"

# ================================================== ============================
*PRN - Parameter Reference Numbers
# --------------------------------
# See sae_generic.txt for more information on the *PRN section
#
#Code PRN SLOT Units System Description
#------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------
CALC.DP F006 CLC-00-001 PSI Fuel "Drive Pressure"
CALC.BP F006 CLC-00-002 PSI Fuel "Boost Pressure"

joecar
September 5th, 2008, 02:54 AM
In the scantool, under the PIDs tab, select EXT.AD1 and EXT.AD2.

RyanU
September 5th, 2008, 03:56 AM
what about a PRN number for my second sensor how do i figure out what i can use? can i just got with F007 or is the something somewhere that i get this number from

joecar
September 5th, 2008, 09:17 AM
Yes, change the second F006 to F007.

(I usually make the Fxxx number the same as the xxx in CLC-00-xxx).

And change PSI to lowercase psi (in 4 places).