968 Speedometer Speed Signal Output
11-10-2021 | 02:44 PM
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Joined: Nov 2021
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From: Houston, TX
968 Speedometer Speed Signal Output
I am doing a Nissan 2019 Maxima Gen 3 VQ35 swap into my 968 (good for about 340 WHP with headers & larger intake tubes & upgraded intake cam with same duration as stock exhaust cam). The ECU I am using requires a 2 pulse square wave input into an '07 Altima instrument cluster circuit board (that I plan to cut down & use the required circuitry with IC chip) in order to get a CAN communication signal sent out to a 2008 Infinity G35 MT Gen 2 type ECU that I plan to use so that the "drive by wire" cruise control system will work. I know that the 968 uses the left front wheel ABS sensor input into the ABS module (which is a 45 pulse/rev sine wave input), and that the ABS module outputs a 45 pulse/rev square wave to the FCU (frequency converter unit), which in turn conditions that ABS output signal to an 8 pulse/rev square wave input into the 968's speedometer for the speed signal to operate it.
My question is, does anyone on this site know what the signal output type is that comes out from the 968's speedometer to the ECU, cruise control unit, etc? In other words, is it the same 8 pulse/rev square wave as the input to the speedometer, or is it reconditioned to maybe a 2 pulse/rev square wave? I need to know in order to figure out what converter box I can get that will achieve the 2 pulse/rev square wave output I need!
My question is, does anyone on this site know what the signal output type is that comes out from the 968's speedometer to the ECU, cruise control unit, etc? In other words, is it the same 8 pulse/rev square wave as the input to the speedometer, or is it reconditioned to maybe a 2 pulse/rev square wave? I need to know in order to figure out what converter box I can get that will achieve the 2 pulse/rev square wave output I need!