What is this? Is this necessary for the car to start? This is the last bit of wiring that is an unknown. The thing that sucks is I think they stopped putting whatever this is into later models because this is the only diagram ive seen that has starter interlock relay. This is a 94JDM WRX im dealing with. The diagram im using is called JDMandUKWiringDiag.pdf its the JDM partially translated.

If you are doing swaps for other people, you really should include it. It forces you to push in the clutch in order to start the car. Two pins can be jumpered on the old AT harness and the car will start right up, however that can cause possible issues if people aren't used to it and start the car in gear.

I suggest checking out the electrical info on my swap write-up
http://www.surrealmirage.com/subaru/swap/electrical.html#start

Josh

Nah this is my car. Whats the neutral switch for then? Also my neutral switch has 4 positions on the connector but ive only ever seen 2 shown on diagrams... what are the brY and uhh BY for?

http://i50.photobucket.com/albums/f332/nova1111/JDMdiag-1.jpg

From ECU b59 59 Is labeled the fuel pump/ignition switch tied to 2 wire that leads to terminal 1 and 2 both Y

From ecu b60 5 IS labeled starter interlock relay

From connector b4 terminal 2 YG to starter interlock relay

So what do I do to bypass this? I dont understand how the exisiting A/T wiring would have any effect since its not hooked up to the ecu any longer...

After a few hours of exploritory surgery I found the connector under the hood.......... K so in my diagram, the JDM one, its a 12 pin connector going to the actual auto trans or a TCU? This is called B1 in my diagram but it has to be the same one because 11 and 12 are the same colors. So if I cut these off and solder them together Im bypassing the AT inhibitor switch that prevents starting in drive reverse etc correcT? But im not bypassing the starter interlock relay am I? Or wait a sec is the MT wiring not existant because the car is AT?

Also what is the throttle pedal switch for?

Also what is the throttle pedal switch for?

Not really sure, but when I did a 96 WRX swap a few weeks ago I put in it. Required some modification to the stock pedal but I got it to work. It seemed important.

Like what did you do? I have US WRX pedals in there now did you add the sensor and wiring to the stock pedal?

Nah this is my car. Whats the neutral switch for then? Also my neutral switch has 4 positions on the connector but ive only ever seen 2 shown on diagrams... what are the brY and uhh BY for?

Do you have a picture of your neutral switch diagram? There is a 4-pin connector coming from the transmission. Two pins are for the neutral switch, and two are for the reverse lights circuit.

The neutral switch tells the ECU when the car is in neutral. The ECU then adjusts timing slightly. It's not as crictically important on the MT equipped cars, but makes a difference on the AT cars. It's something that if you hook up, and the rpms do weird things when you move the gear selector in and out of gears, the MT/AT identifer wiring needs to be swapped.

http://i50.photobucket.com/albums/f332/nova1111/JDMdiag-1.jpg

From ECU b59 59 Is labeled the fuel pump/ignition switch tied to 2 wire that leads to terminal 1 and 2 both Y

From ecu b60 5 IS labeled starter interlock relay

From connector b4 terminal 2 YG to starter interlock relay

So what do I do to bypass this? I dont understand how the exisiting A/T wiring would have any effect since its not hooked up to the ecu any longer...

From looking at that diagram, I don't think you have to worry about b59 59 because the car has an automatic wiring harness. Because of that, all you should have to do is jumper pins 11 & 12 on the trans connector harness, and that should take care of things.

Only thing I'm not sure about is your comment about the a/t wiring not being hooked up? Did you pull it out of the wiring harness? It should still be tied into the ECU wiring, etc.

After a few hours of exploritory surgery I found the connector under the hood.......... K so in my diagram, the JDM one, its a 12 pin connector going to the actual auto trans or a TCU? This is called B1 in my diagram but it has to be the same one because 11 and 12 are the same colors. So if I cut these off and solder them together Im bypassing the AT inhibitor switch that prevents starting in drive reverse etc correcT? But im not bypassing the starter interlock relay am I? Or wait a sec is the MT wiring not existant because the car is AT?

Yeah from the diagram B1 looks to be the same as the B15 I'm talking about, and yes you should be able to just solder pins 11 & 12 together and it'll start right up.

There is no starter interlock relay....your car was an automatic....so it'll start any time.

Like what did you do? I have US WRX pedals in there now did you add the sensor and wiring to the stock pedal?

I put the two pedals next to each other and saw what needed to be done to get it to work on the usdm pedal basically. It's a very visual thing, it makes a lot of sense when the jdm pedal is put right next to the usdm.

I put the two pedals next to each other and saw what needed to be done to get it to work on the usdm pedal basically. It's a very visual thing, it makes a lot of sense when the jdm pedal is put right next to the usdm.

I have both of them. Did you remove the sensor or transplant the pedal?

I have both of them. Did you remove the sensor or transplant the pedal?

Removed the sensor and modified the USDM pedal to make it work, i think. :)