TwinTurbo.NET: Nissan 300ZX forum - Harness install now no start, no ECU power
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Subject Harness install now no start, no ECU power
     
Posted by ste z on November 02, 2012 at 9:00 PM
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Message I recently purchased a white 93 NA for my wife, its a high mileage car but unmolested and all there. All it needed was some serious TLC and a new EFI harness was part of that. I have replaced an EFI harness before and am familiar with what it requires.....

Before the new harness the car started and would run........now it cranks and wont start

Not fretting I referenced my trusted shop manual, starting on EF & EC 77

This took me to EF & EC 106. I have no spark. Following the flow chart in 106 I determine that I have no power into my ECU

Here is where Im stuck. All tests in diagnostic procedure 2 (EF&EC107) are a pass EXCEPT step A...insted of 0.8-1.0v at pin 16 I have battery voltage. All other pin/ground/continuity tests are OK......

Next I assume that the factory alarm must be withholding ECU power. I follow the first three or four alarm tests and all are OK. Next (out of frustration) I just disconnect the alarm completely, and nothing changes

still a crank and no start....no spark....no ECU power

I hope that one of you experts out there can lend some assistance as I am becoming very frustrated.

Dustin

     
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