Aldl LT1 datastream

[yoheer]

Hi. Im trying to adjust my arduino gauge
I cant get IAT data.
Trans temp and coolant works
I believe it is A274 datastream
All I get is negative 40 always.

Word 25
MATDEGND NON-DEFAULTED MAT VARIABLE
DEG C= .75N - 40
DEG F= 1.35N - 40

I don't know why but I cant get this data from the protocol

[kur4o]

IAT is byte 24, counted from zero.

If you use it as a word that might explain the odd readings.

[yoheer]

It is byte not int?
coolant and trans temps are int
upd
Oh i see my mistake. I used wrong datastream
I'll check

[yoheer]

I want to add wideband reading. Using Kur40's pcm patch with d31 or d27 pin.(eehack uses pin27. d31 in the patch description)
What datastream data should I use?

It is written Byte 36 mode1 msg1 (patch)

Is it instead of SDINMW1 input mode word 1?
This is from mode 1 msg1, 36 word
Is it correct?

[NomakeWan]

D27 is the spare unused ADC input. D31 is the ADC input for the A/C pressure sensor.

According to EEHack's definition file for $EE, the A/C Pressure input is a Byte (8 bits) at Offset 26 in a Mode 00 message (F4 00). Pin D27 input would be read as a Byte (8 bits) at Offset 54 in a Mode 00 message (F4 00).

[yoheer]

thnx, I'll check
I believe it is mode 1 msg 0 byte 55 ALDL message
and it is not used in description