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How to wire a KA, CA, SR, and VG into anything


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#981 simonh

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Posted 04 August 2017 - 06:12 AM

Thanks very much for the guide and the help available on here. If anyone is starting this thread from the end then some very basic advice would be not to over think it, you don't actually need to know why you're doing everything. Reading through the thread can be confusing at first. The most important thing in hindsight is not to cut any wires unless they're at a plug. If joining anywhere else in the loom just splice into the wire as it could be connected to something else further up.

 

Does anyone know if the fan is controlled by the ecu in the SR20DE (S14)? I found some information saying that the relay was triggered by pin 9 on the ECU but the pinout diagram that seems right for my car has pin 9 as being the AC cutout relay. There is no mention of an engine fan. The car did have an electric fan as well as the viscous one.



#982 Lockleaf

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Posted 04 August 2017 - 08:09 AM

That electric fan is the AC fan. So yes it should be properly marked as AC. And yes that pin could act to turn on that fan. But in no way is it tied to engine temperature.

The engine cooling fan is the viscous one. The condenser (AC) fan is for increasing AC efficiency and adding additional cooling capability to the radiator because of the extra load and heat.

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#983 Icehouse

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Posted 04 August 2017 - 08:59 AM

I tried the fan relay output people talked about.  The one that controls the AC fans.   I feel it lets the motor get way to hot, although on the car I tested it on there was no temp gauge.  Let us know if you find out what temperature it turns on at.  


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#984 Draker

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Posted 04 August 2017 - 09:10 AM

I tried the fan relay output people talked about.  The one that controls the AC fans.   I feel it lets the motor get way to hot, although on the car I tested it on there was no temp gauge.  Let us know if you find out what temperature it turns on at.  

 

Some cars (z32) will trigger the AC fan as a helper fan if the engine temp gets too hot. so that's likely why you would be experiencing that. I think they are programmed to kick on late as a helper if the mechanical fan is not handling the heat load.


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#985 SR720

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Posted 05 August 2017 - 02:32 AM

Hey guys, i am doing my first ECU wire up. Does anyone know if the S14 Pin out has any relation to the S15? I have what i was told was an S15 SR20 imported from Japan, however i cant seem to get any of the ECU pin outs for ADM or JDM S15 to line up with what i have. I am also trying to work of the Body harness plug rather than the ECU plug. Can anybody help with hints and tips? 



#986 simonh

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Posted 08 August 2017 - 02:36 AM

Thanks for clearing that up. I guess it's only the fwd models that would have an engine fan controled by the ecu then.

 

I have no space for the viscous fan and wont be running the air conditioning so will just run a separate fan controller so the electric fan control is directly related to the engine temperature.



#987 Icehouse

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Posted 08 August 2017 - 08:12 AM

Hey guys, i am doing my first ECU wire up. Does anyone know if the S14 Pin out has any relation to the S15? I have what i was told was an S15 SR20 imported from Japan, however i cant seem to get any of the ECU pin outs for ADM or JDM S15 to line up with what i have. I am also trying to work of the Body harness plug rather than the ECU plug. Can anybody help with hints and tips? 

 

 

I have the FSM for the S15 I can email it to you.  Yeah its really similar to the S14.  


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#988 simonh

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Posted 08 August 2017 - 12:51 PM

Best tip is probably to unwrap the harness between the ecu and the plug you're working from. It makes it really simple to follow the wires as once you get started you can soon get jumbled up. Eight wires doesn't sound like much but there are so many other ones too, often with similar or the same colours, some joining into other things too. If you can see the physical wires it's so much simpler and will save you loads of time.



#989 Shaker

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Posted 12 September 2017 - 02:03 AM

Just wanted to say Thanks for the Fuse Box. It made wiring up the Sr into my 720 much easier. :)