2000 Miata no sync
#8
So I tried replacing the cam sensor entirely and when I took a composite log, it caused me to lose crank sensor reading as well. Swapped back to original cam sensor and crank signal came back but still no cam. I’ve send dimitri a message in hopes he can steer me in the right direction re: JP1 and J1. JP7 on my board has 3 pins. And two of them are jumpered. I’ve tested continuity on the power, ground and signal wires on both crank and cam, both are good. Can anyone tell me, in cranking settings, will rising edge or falling edge make a difference when it comes to getting the correct signal? Appreciate the replies
edit: I think it’s worth mentioning that the car runs fine on the oem ecu, with maf connected. the car is a 2000 Miata NB non vvt
edit: I think it’s worth mentioning that the car runs fine on the oem ecu, with maf connected. the car is a 2000 Miata NB non vvt
Last edited by Rc 415; 01-09-2021 at 01:49 PM.
#12
so I’ve done some research and traced the input pin from cam sensor to pin 2 of optoisolator ok1 and continuity checks out. I’ve also done basic resistance tests across anode (pin1) and cathode (pin2), I get a reading of .812m ohm with red lead on pin 1 (anode) and when switching leads I get infinite. also tested the emitter (pin 4) and collector (pin 5), I get 4.984k ohm reading with red lead on pin 5, 4.046k ohm with red lead on pin 4. Resistance seems to come in very close across the board between ok1 and ok2. Reverant, do you have any more thoughts on this? Thank you
#14
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Tap the pin of the daughterboard (the one you put the red probe on) to ground repeatedly and check if you get a cam signal on the composite logger. If you do, the daughterboard/processor is fine and you probably need to replace the optoisolator.
#16
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Last check before you go on replacing it, go to File -> Vehicle Projects -> Project properties -> Settings -> PORT_STATUS: Activated.
Now create a new dashboard, you'll have the status of each processor pin (both in and out) as an indicator, PORTXn, on the bottom. Check for the PORTTn indicators, PORTT5 should be blinking when you tap the processor's cam input to ground.
Now create a new dashboard, you'll have the status of each processor pin (both in and out) as an indicator, PORTXn, on the bottom. Check for the PORTTn indicators, PORTT5 should be blinking when you tap the processor's cam input to ground.
#17
Last check before you go on replacing it, go to File -> Vehicle Projects -> Project properties -> Settings -> PORT_STATUS: Activated.
Now create a new dashboard, you'll have the status of each processor pin (both in and out) as an indicator, PORTXn, on the bottom. Check for the PORTTn indicators, PORTT5 should be blinking when you tap the processor's cam input to ground.
Now create a new dashboard, you'll have the status of each processor pin (both in and out) as an indicator, PORTXn, on the bottom. Check for the PORTTn indicators, PORTT5 should be blinking when you tap the processor's cam input to ground.