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Summary of change:
====== MAIN INPUTS ====== '''Air metering''' :Original ::MAF :VEMS ::4bar MAP + IAT (already have both) ::MAP will be mounted externally, close to the IM, shortest possible tubing ::5V supply comes from the ECU ::IAT is a BMW type, res./temp diagram '''TBC''' :''Wiring changes - MAF'' ::Cut off MAF at the pigtail, it's 3 wires (12V, GND, signal). Use these for the MAP sensor, which also takes 3 wires (5V, GND, signal). :''Wiring changes - IAT'' ::Need to look for a suitable wire that will be freed up, and goes to the throttle body area, where the IAT will be located. ::*1 or 2 wires? Ground wire could be spliced into the ECT/TPS ground B wire, which is right there. Only 1 additional wire needed then. ::*Idle switch? 2 wires from ECU, and idle switch is not used in VEMS, but '''TBC'''. '''Crank angle, cylinder pos.''' :Original ::mounted on EX cam, disc has two concentric rings for two optical pickups with OC outputs ::(pulled on up ECU side) ::http://gtlamateurfest.uw.hu/nissan/2013-01-CAS-oscope/ca18detCas.jpg ::Outer ring has 360 slits ::Inner ring has 4 windows w/ lengths in slits: 16, 12, 8, 4 ::'''CHECKED''' no. of degree pulses for Window slits High/Low ('''H''' L '''H''' L '''H''' L '''H''' L) '''16''' 74 '''12''' 78 '''8''' 82 '''4''' 86 ::'''CHECKED''' 16 pulse window corresponds to Cyl 1. According to a few Internet sources, Rising edge of 16-slit window is '''60 BTDC'''. Which sounds logical. :: For '''primary trigger''', will either use: ::::* Rising edge w/60 BTDC ::::* Falling edge w/28 BTDC (window length is 16 sectrig pulses, that's 32 crank degrees) :: '''Secondary trigger''' will use Nissan special trigger option, sync Cyl#1 to Window longer than 13 sectrigger pulses ("Ignore pulses shorter than" option) ::http://gtlamateurfest.uw.hu/nissan/2013-01-CAS-oscope/cas4.jpg :: :VEMS ::using the same CAS with the "nissan 360 degree secondary trigger" option :''Wiring changes'' ::The ''TDC'' (inner ring) and the ''angle'' (outer ring) signals are both wired double into the ECU, on pins 41+51, and 42+52, respectively. Probably a good idea to solder these together, before crimping it into a connector. ::'''JDM swap guys''' and '''RHD M/T guys''' should check their wiring/colors on FSM page {{EF&EC - 82}}. It's a bit unclear, the ''TDC'' and ''angle'' signal has the same wire color (G/B). Label them before you cut. '''Engine coolant temperature''' :Original ::NTC regular type, 2.5kOhms at 20*C, 300Ohms at 80*C :VEMS ::using the same '''Throttle position sensor/switches''' :Original ::Idle switch, closed when pedal released ::TPS ~1kOhms - ~9kOhms for fully released, fully pressed, respectively :VEMS ::using the same, except idle switch is not normally considered (although it can be connected to a free analog input of course). Mixing in idle switch (pulling to GND, but through 10..20k) into TPS signal (for a voltage "step") is superfluous and should not be justified, TPS has all the information without this anyway. '''Knock sensor''' :Original ::1 channel, piezo type, mounted between #2 and #3, shielding grounded to ECU ground, near ECU :VEMS ::using the same '''O2 sensor''' :Original ::N/A, stock narrowband removed, Bosch 4.x installed ::'''TBC''' 4.2 or 4.9 ::'''TBC''' for any special requirements for an extension cable, twisting, shielding, etc., or just simple wiring :VEMS ::using the Bosch 4.x WBO2 directly
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