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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 07-22-2020, 05:03 AM   #1
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1995 s14 Bare bones race wiring. Which Ecu wires need power to start Ka24de without c

Which pins/wires need power on 1995 Ka24de ecu to start engine with no factory chassis harness? I have made a bare bones race car wiring panel with a fuse panel and relays. I combined all the ground wires on ecu and also pins 56 and 61 being they are labeled power supply for ecu. The engine will not start with just those power wires. The only other pins I can see that may need power are pins 4-ECU rely(self shut-off),20-ignition/start signal,38-ignition switch,and both 70 pins-power supply(back-up). Does anyone know which pins need constant power and temporary power?


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Old 07-22-2020, 05:14 AM   #2
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Here you go buddy..

https://www.nicoclub.com/nissan-service-manuals

Read it, learn it, apply the knowledge you gained to solve your issue.
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Old 07-22-2020, 05:35 AM   #3
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That is a badass link right there. Thank you much sir!


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Old 07-23-2020, 10:43 AM   #4
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I have Gone through everything and wired it up the way I thought it should be and still no start. I?m getting spark and fuel. Also read the ecu and it?s throwing 25-iacv,41-iat,84-a/t diag comm line. 41 and 84 shouldnt matter with getting it to start. 25 on the other hand has me thinking. I unplugged the 2 plugs on the iacv and check for 12v and neither have power when the ignition is on. Could this be it? I will post the pin out for my ecu. Maybe one of you can screen shot it and highlight everything that needs to be wired and repost. I joined all the ecu grounds to 1 already. Your help me greatly appreciated!! I am currently working on the car rn as we speak so I will try what y?all say and get back with results in an instant
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Old 07-24-2020, 04:44 PM   #5
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Found my issue. Wasn?t the wiring at all. Wasn?t getting fuel.


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