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Old 08-11-2011, 08:07 PM
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self diagnostics problem 92 nissan stanza

ok well i have a 92 nissan stanza xe 2.4 liter fuel injected and it was running fine and parked it went out 2 days later and no firing no fuel pump so we changed the fuel pump still didnt help till today fuel pump cam on 3 times when i cut on key and no nothing again i went to do self diagnostics on the ecu and all its doing is flashing a red light constantly and no green light at all and when the red light is flashing the check engine light is flashing at the exact same time any ideas on what may be the problem??? thanks and have a nice day

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Old 08-15-2011, 06:31 PM
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If you want codes from it , there is a potentiometer inside the ecm case that you access with a pocket screwdriver.It will rotate about 290 degrees.
What you want to do is turn it all the way (be gentle dont break it), with the key on , then watch for the red to blink ( both red and green may blink together on yours) It will blink once then pause, then twice then pause, then three times. Immediatley turn the potentiometer back the full 290 degrees to the original posisition. You have now just put the ECM into MODE 3.If you miss it they will blink 4 times then pause, then 5 then 6 etc. If you miss it turn the potentiometer back to the original position turn off the key wait one minute and start over, or wait till it gets back around to mode 3(three flashes).
When you are in mode 3, the red and green LEDs will flash.
Count the red and green blinks, reds are 10, greens are singles.( like money)
2 red blinks and 3 green blinks is a code 23.(example)
Get busy son.
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