NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   Still not running (https://www.nopistons.com/2nd-generation-specific-17/still-not-running-72800/)

mjbeer 07-19-2009 02:59 PM

so, i posted on here a while ago, trying to figure out what could be causing me to not have any spark. i've checked the cas and even swapped it out, i've swapped out the computer...still not running. i've checked all the wires, and they're all good. the car was running...it died on me while i was driving. does anyone know how many volts the computer sends to the cas? what about the coils. i'm only getting max 1 volt from the computer to the cas...and maybe 0.5 volts to the coils...

RicerJ 07-22-2009 01:14 AM

.2-1 ohm is good for coils cass g1 to g2 110-210 ohms and same for ne1 to ne2

RX200013B 07-22-2009 02:10 PM

check main relay opperation



possible circut opening relay

j9fd3s 07-26-2009 01:07 PM


Originally Posted by mjbeer' post='924531' date='Jul 19 2009, 12:59 PM
so, i posted on here a while ago, trying to figure out what could be causing me to not have any spark. i've checked the cas and even swapped it out, i've swapped out the computer...still not running. i've checked all the wires, and they're all good. the car was running...it died on me while i was driving. does anyone know how many volts the computer sends to the cas? what about the coils. i'm only getting max 1 volt from the computer to the cas...and maybe 0.5 volts to the coils...



there should be no voltage to the CAS, its just a signal.



coils should get battery voltage on the black/yellow wire with the key on, if not main relay is likely



the other wire is a signal FROM the ecu, so its going to be and on/off signal

mjbeer 08-14-2009 02:47 PM


Originally Posted by j9fd3s (Post 832415)
there should be no voltage to the CAS, its just a signal.



coils should get battery voltage on the black/yellow wire with the key on, if not main relay is likely



the other wire is a signal FROM the ecu, so its going to be and on/off signal



i know that the voltage from the ecu to the coils will be on and off...my multimeter has a min max function on it...so it will store and tell me the highest voltage that goes through it. and it's giving me about a volt or so. and that is not true...if you look at the wiring diagram the ecu sends a signal voltage to the cas...which as it spins it changes the resistance and sends that voltage back to the ecu telling the ecu what position the shaft is at


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