Proves the problem is NOT in the ELU, but in the PCME fault detection circuitry or in one of the input signals to the PCME. One would think that if a sensor was at fault, a trouble code would appear rather than a constant low FEN voltage. It's not the PCME output shorted since it can go to 11 volts. It must be a fault inside the PCME.
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Originally Posted by wstrohm
(Post 11555048)
Proves the problem is NOT in the ELU, but in the PCME fault detection circuitry or in one of the input signals to the PCME. One would think that if a sensor was at fault, a trouble code would appear rather than a constant low FEN voltage. It's not the PCME output shorted since it can go to 11 volts. It must be a fault inside the PCME.
we have already tried swapping the PCME to another PCME with the exact same result. I guess this means we're looking for a bad input, rather than a bad output from the PCME? We were going to check the X-07 connector, but sounds like from what you're saying that won't show a problem either. |
No further ideas here; looks like a puzzle for a digital processor expert. The action you see sounds as if the PCME initially sees no fault (terminal 1F goes high) and then decides there is a fault that deserves a constant CEL and sets 1F low. Don't know what that fault would be.
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Originally Posted by joelanger
(Post 11542983)
so how do you do this on a JDM model with no 'check engine light'?
With this set-up works just the same then as above, using your LED as the CEL I used some pre-wired LEDs from ebay (5 for 99p or like $1.50) that then didn't need the resistor in the line. :icon_tup::icon_tup: might be worth adding this in the top mate to help any other JDM rotor head out!! |
Originally Posted by MuRCieLaGo
(Post 11295772)
Made a video years ago of what it looks like reading codes with my JDM FD.
https://www.youtube.com/watch?v=RQA_TZKRY8U scratch that just saw the write up |
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