S14 Power FC - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Loomis112 · 09-01-2020, 08:25 PM

I have a 95 S14 with a redtop SR20.

I'm a little overwhelmed and need to be pointed in the right direction.

I bought an apexi power fc from a user here and plugged it in. No start no fuel pump prime and no display on the hand held.

I started to look into it and from what I can read the Power FC uses all ECU power and even requires backup power to run.

I took a multimeter to my wiring harness and this is what I found.

Pins: 38 B/W and 47 B/W have no power and pin 46 R is getting 12v

So the backup power is the only power that seems to be coming into the ECU

Pins 38/47 are both ECU powers and it looks like one of them dissapears into the harness and one runs to the ECCS or some other relay that is close to the ECU plug?

I was fighting back and forth wondering if this was a ka harness or sr harness because a lot of pins/wires have been removed from the plug nothing too important it seems but still.

I could use some help overall.

my main question is im supposed to have 12v at pins 38 and 47 correct? and if so where do I start troubleshooting?

forgot to mention ECU serial #A11000G90 runs the car its drive-able but extremely rich

Loomis112 · 09-01-2020, 10:30 PM

I think I?ve narrowed it down to it being the ECCS relay I tried searching a part number for it but can?t seem to find the right one.

Does anyone know where to get those relays?

samotage · 09-02-2020, 02:35 AM

Pull the relay, it will have numbers etc on it and use those to find an equivalent

Sent from my iPad using Tapatalk

Loomis112 · 09-02-2020, 07:17 AM

Quote:

Originally Posted by samotage

Pull the relay, it will have numbers etc on it and use those to find an equivalent

Sent from my iPad using Tapatalk

Sorry forgot to mention that number ST-01040 but nothing that comes up looks like it on the web.

zombiewolf513 · 09-02-2020, 08:20 AM

https://www.ebay.com/sch/i.html?_fro...w=nissan+relay

Loomis112 · 09-02-2020, 08:28 AM

Quote:

Originally Posted by zombiewolf513

https://www.ebay.com/sch/i.html?_fro...w=nissan+relay

Thanks man ordered the RE-RY51 Gonna try that out I appreciate it.

S14rebuild · 09-02-2020, 10:50 AM

Before u order it, did u test the pins? No sense in just swapn parts out..

Loomis112 · 09-02-2020, 12:33 PM

Quote:

Originally Posted by S14rebuild

Before u order it, did u test the pins? No sense in just swapn parts out..

The ECCS pins? If so yes with the key turned it showed no voltage

S14rebuild · 09-02-2020, 01:00 PM

Where the eccs relay plugs in, there are pins, u should be checking for grounds and voltage via the fsm, before u condone the relay as bad and replace it

Loomis112 · 09-02-2020, 01:36 PM

Quote:

Originally Posted by S14rebuild

Where the eccs relay plugs in, there are pins, u should be checking for grounds and voltage via the fsm, before u condone the relay as bad and replace it

I will do that tonight luckily the relay was cheap.

Loomis112 · 09-02-2020, 07:57 PM

Just for the sake of ending the thread it was indeed the relay.

zombiewolf513 · 09-02-2020, 08:44 PM

You get the FC working???

Loomis112 · 09-03-2020, 10:32 AM

Quote:

Originally Posted by zombiewolf513

You get the FC working???

Yes I did it was the ECCS relay and a loose wire

S14rebuild · 09-03-2020, 10:37 AM

Nice!!!!!!!

zombiewolf513 · 09-03-2020, 11:16 AM

Ok, good! I hope it serves you well!

09-01-2020, 08:25 PM	#1
Loomis112 Zilvia Member Join Date: Jan 2014 Location: USA Age: 27 Posts: 213 Trader Rating: (0) Feedback Score: 0 reviews	S14 Power FC I have a 95 S14 with a redtop SR20. I'm a little overwhelmed and need to be pointed in the right direction. I bought an apexi power fc from a user here and plugged it in. No start no fuel pump prime and no display on the hand held. I started to look into it and from what I can read the Power FC uses all ECU power and even requires backup power to run. I took a multimeter to my wiring harness and this is what I found. Pins: 38 B/W and 47 B/W have no power and pin 46 R is getting 12v So the backup power is the only power that seems to be coming into the ECU Pins 38/47 are both ECU powers and it looks like one of them dissapears into the harness and one runs to the ECCS or some other relay that is close to the ECU plug? I was fighting back and forth wondering if this was a ka harness or sr harness because a lot of pins/wires have been removed from the plug nothing too important it seems but still. I could use some help overall. my main question is im supposed to have 12v at pins 38 and 47 correct? and if so where do I start troubleshooting? forgot to mention ECU serial #A11000G90 runs the car its drive-able but extremely rich

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09-01-2020, 10:30 PM	#2
Loomis112 Zilvia Member Join Date: Jan 2014 Location: USA Age: 27 Posts: 213 Trader Rating: (0) Feedback Score: 0 reviews	I think I?ve narrowed it down to it being the ECCS relay I tried searching a part number for it but can?t seem to find the right one. Does anyone know where to get those relays?

09-02-2020, 02:35 AM	#3
samotage BANNED Join Date: Oct 2018 Location: Melbourne Posts: 88 Trader Rating: (0) Feedback Score: 0 reviews	Pull the relay, it will have numbers etc on it and use those to find an equivalent Sent from my iPad using Tapatalk

09-02-2020, 08:20 AM	#5
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	https://www.ebay.com/sch/i.html?_fro...w=nissan+relay

09-02-2020, 10:50 AM	#7
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Before u order it, did u test the pins? No sense in just swapn parts out..

09-02-2020, 01:00 PM	#9
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Where the eccs relay plugs in, there are pins, u should be checking for grounds and voltage via the fsm, before u condone the relay as bad and replace it

09-02-2020, 07:57 PM	#11
Loomis112 Zilvia Member Join Date: Jan 2014 Location: USA Age: 27 Posts: 213 Trader Rating: (0) Feedback Score: 0 reviews	Just for the sake of ending the thread it was indeed the relay.

09-02-2020, 08:44 PM	#12
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	You get the FC working???

09-03-2020, 10:37 AM	#14
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Nice!!!!!!!

09-03-2020, 11:16 AM	#15
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	Ok, good! I hope it serves you well!