Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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The Pin 117 is for the vacuum cut by pass valve. That should have battery voltage when the key is in the ON position. Did you replace the ECM with a used one?
Did you check all fuses and do a full Ecm terminal reference check? Also I would cut the wire from the Ecm and see if that wire is shorted to ground which could damage the Ecm.
let me look at the wiring diagram.. Hang on..
Fuse 9 on the inside fuse box. Power comes from there and goes through the valve and to the Ecm.
That is the fuse location.
So I would start with checking that fuse with a test light. Make sure the fuse is good and getting power. Then I would check for power at the Vacuum Cut By Pass solenoid, the Black wire with the yellow stripe and see if you have power and and just trace it back to the Ecm. The ECM is looking to see power on that wire when the key is in the ON position..
The link I gave you shows where fuse number 9 is located. Did you check that fuse?
did you check power at the Vacuum Cut Bypass solenoid?
Then I would monitor voltage coming out of the fuse box that goes to the Vacuum Cut Bypass solenoid. I have seen where fuse boxes go bad. Can you read a wiring diagram?
If you are only getting 4 volts at the solenoid, I would measure voltage out of the fuse box. If you have good voltage out of the fuse box, then you would need to do a voltage drop on that wire or run what they call a overlay ( run a new wire ) to resolve your issue.
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