NIStune Feature Pack V.1 - Manual (Page 18)

Page 18 of 27
S13 CA18DET
Pin 37 - MAF Calibration signal (non-cat models have a line, cat models will need this pin inserted)
Pin 60 - Ground
Pin 49 - 12V power
To reuse the MAF calibration signal, hold down the line using around 100K ohm resistor and use a pull up to 12V via
clutch switch or similar. We use pull up here because of capacitance held on the line.