im trying to tune a 0411 pcm in a 98 camaro.
is there a way to do this without the pro interface?
i understand to run the positive analog output wire from the lm2 to the ac pressure input wire of the pcm.
however, wiring the ground has me confused.
the manual states:
5.3.3 Wiring Analog Outputs
The analog outputs on the LM-2 are differential. As with the analog inputs, the negative
lead (-) must be connected to ground for the readings to be accurate. Below are the
three different ways the analog outputs of the LM-2 can be wired. If you are unsure
whether your analog input is differential or not you may wire the analog output as shown
in diagram 1 .
does the 0411 pcm have a differential analog input?
since the pcm is grounded to the engine/chassis and has a 5 volt reference circuit built within, can i just run the negative analog output from the LM2 straight to the pcm low voltage reference (0-5v ground)?
or do i ground straight to the battery?
or both in parallel?