TwinTurbo.NET: Nissan 300ZX forum - No ECU diagram.
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Subject No ECU diagram.
     
Posted by DVDBURN (MD) on August 16, 2011 at 5:01 PM
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In Reply To "The fix. Replace. " posted by moxie (SF) on August 16, 2011 at 02:33 AM
     
Message But I'm getting to the point that I could probably make one :)

I knew it was the ECU so first, with just the ecu not connected to anything, I did a resistance check between the pins that go to the injectors and ground.

I found that the pin for injector 4 was reading 12.34 K ohms where all the other injector pins read around 2.4 meg ohm. I traced pin 4 back to one of the legs of the chip. I replaced the chip, rechecked the resistance readings which were now fine, retested the ECU with my simulated engine running setup and everything worked fine.

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