J&S safeguard v2
09-30-2003, 03:04 PM
#26
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09-30-2003, 04:32 PM
#27
Re: (preludesh012001)
Ok, you have one of their contemporary units, so the instructions on their site appear to be valid for you unit. However, their wiring diagram shows the wrong pinouts for the car's wiring (it's probably for an OBDI Civic or something).
I took a screen shot of their wiring diagram and appended it with the proper labels for the 5th gen lude wiring. Also of note: you will not need to wire up the TPS (throttle position sensor) for your setup, and I removed it from the diagram. And definitely DO NOT WIRE/USE THE MAP LIMITER ON THE J&S UNIT IF YOU ARE USING THE JR ELECTRONICS. The JR electronics use a MAP signal hack similar to a VAFC as part of its control over fueling. Be careful: the stock ignition wire (A20) is Yellow/Green, and the VTEC solenoid wire (A8) is Green/Yellow, don't get them mixed up! Here's the modified wiring diagram:
I took a screen shot of their wiring diagram and appended it with the proper labels for the 5th gen lude wiring. Also of note: you will not need to wire up the TPS (throttle position sensor) for your setup, and I removed it from the diagram. And definitely DO NOT WIRE/USE THE MAP LIMITER ON THE J&S UNIT IF YOU ARE USING THE JR ELECTRONICS. The JR electronics use a MAP signal hack similar to a VAFC as part of its control over fueling. Be careful: the stock ignition wire (A20) is Yellow/Green, and the VTEC solenoid wire (A8) is Green/Yellow, don't get them mixed up! Here's the modified wiring diagram:
09-30-2003, 05:10 PM
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Well shark, i printed this out and its all making sence. Looking at this im only wiring up the blue, green, 12v, brown, ground(black), and white wire correct. Well it all makes sence and im gonna attempt to install it this weekend, thanks for all your help. Im sure ill be needing more soon but we'll see. O and the connecter are only A and D which i can use the diagram from hondaprelude.to right, thanks again
09-30-2003, 05:28 PM
#29
Re: (preludesh012001)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by preludesh012001 »</TD></TR><TR><TD CLASS="quote">O and the connecter are only A and D which i can use the diagram from hondaprelude.to right, thanks again</TD></TR></TABLE>
If you are referring to the pinouts for the plugs, yes. Here is a copy of them for your reference:
If you are referring to the pinouts for the plugs, yes. Here is a copy of them for your reference:
10-03-2003, 11:25 AM
#31
Re: (preludesh012001)
That's correct, there is no need for the TPS wire in your case, and it would probably be best not to wire it in. The J&S uses the TPS connection to send a WOT signal to the stock ecu when boost is present, the idea being to put the ecu into open loop during boost. The JR electronics already take care of this.
10-03-2003, 02:35 PM
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Im a little confused with the A20 ignition wire. I looked at the diagram but what exactly do i have to do? Also haveing a Apex-i Vafc will that afftect anything?
10-04-2003, 05:31 AM
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ECU-cut yellow/green--Yellow from JR--now what am i connecting to green(whats the other side and do i just tap this)---white to engine side of A20 wire.
10-04-2003, 02:02 PM
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IS that what you mean, cut the yellow/green of the ECU--connect the yellow from the JR to that---then tap the green from the J&S to the yellow/green of the JR --- and then splice the remaining yellow/green to the white from the J&S which goes out to the motor?
10-04-2003, 03:38 PM
#36
Re: (preludesh012001)
You need to cut A20 (yellow/green wire), then splice the ecu side of the A20 wire to the J&S green wire, and the engine side of A20 to the J&S white wire.
Edit: forgot you had the JR "ems" in there. Follow the A20 wire from the plug to where it connects to the JR "ems" box. From there, there is a yellow/green wire from the JR "ems" box that will then be connected to the stock yellow/green wire that runs to the engine. This is where you want to cut for the ignition wire. Then splice the J&S green wire to the "ems" yellow/green, and the J&S white to the yellow/green running to the engine.
Edit: forgot you had the JR "ems" in there. Follow the A20 wire from the plug to where it connects to the JR "ems" box. From there, there is a yellow/green wire from the JR "ems" box that will then be connected to the stock yellow/green wire that runs to the engine. This is where you want to cut for the ignition wire. Then splice the J&S green wire to the "ems" yellow/green, and the J&S white to the yellow/green running to the engine.
10-05-2003, 12:37 PM
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the car is now idleing a little higher and the J&s is lighting up where the monitor plugs in but the monitor shows nothing? whats not rite? And the vti says on on the vafc and the vto is off? Before they both used to say off.
Modified by preludesh012001 at 10:12 PM 10/5/2003
Modified by preludesh012001 at 10:12 PM 10/5/2003
10-05-2003, 05:24 PM
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engine light is just a constant short blink, the atts is 4 long and 3 short so i guess code 43 on the atts. For the check engine lights its just blink(short) then a while and again blink(short) and again...lol JRSC can be a very frustrating unit cant wait to feel some power with confidence. Thanks for all your help again shark, so greatly appreciated
Modified by preludesh012001 at 2:49 AM 10/6/2003
Modified by preludesh012001 at 2:49 AM 10/6/2003
10-05-2003, 05:26 PM
#43
Re: (preludesh012001)
http://www.hondaprelude.to/main_checkengine.html
Post up what you got, I can double check the codes in the Helm manual.
Post up what you got, I can double check the codes in the Helm manual.
10-05-2003, 06:13 PM
#45
Re: (preludesh012001)
The ATTS code is coming on because of the problem at the ecu. That's normal and it should go away once the wiring issue at the ecu is repaired.
Code 1 is for the O2 sensor. How did you wire the signal wire for the dual monitor into the O2 sensor signal wire (D7 white)? Did you tap it, or cut and solder? Double check your wiring for this, it sounds like you might have to rewire it (and also explains why you are getting no readout on the a/f LEDs on the monitor).
As for your VAFC, it sounds like an issue with the wiring for the J&S vtec wire. I had missed that you had a VAFC until now. Rather than tap the J&S vtec wire on the ecu vtec wire, it should be tapped into the vtec output wire on the VAFC. Wherever you tapped, if you had properly tapped the wires it should not have caused a problem with the VAFC. Let me know where you tapped, and we'll go from there.
Code 1 is for the O2 sensor. How did you wire the signal wire for the dual monitor into the O2 sensor signal wire (D7 white)? Did you tap it, or cut and solder? Double check your wiring for this, it sounds like you might have to rewire it (and also explains why you are getting no readout on the a/f LEDs on the monitor).
As for your VAFC, it sounds like an issue with the wiring for the J&S vtec wire. I had missed that you had a VAFC until now. Rather than tap the J&S vtec wire on the ecu vtec wire, it should be tapped into the vtec output wire on the VAFC. Wherever you tapped, if you had properly tapped the wires it should not have caused a problem with the VAFC. Let me know where you tapped, and we'll go from there.
10-06-2003, 10:57 AM
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I will check the o2 tap today and when i wired up the safeguard yestrerday the vafc said that the vti was on meaning vtec was on with the car. It smelt a lot richer and revs were higher. I disconnected to unit and will try again. As for the dual monitor i dont understand why it isnt working, the knock sensor or the air/fuel? When i turn the key the knock monitor blinks left to right and then off?
Modified by preludesh012001 at 12:41 AM 10/7/2003
Modified by preludesh012001 at 12:41 AM 10/7/2003
10-06-2003, 01:23 PM
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I looked at the wiring on the monitor. The air/fuel is it the gray wire? If so i followed it and it seems i have it directly connected to the cat. Is that installed incorrectly?
10-06-2003, 05:55 PM
#49
Re: (preludesh012001)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by preludesh012001 »</TD></TR><TR><TD CLASS="quote">I looked at the wiring on the monitor. The air/fuel is it the gray wire? If so i followed it and it seems i have it directly connected to the cat. Is that installed incorrectly?</TD></TR></TABLE>
By "gray wire", are you referring to the gray lead from the monitor cable? I'm not sure what exactly you mean by "directly connected to the cat". The "gray" (I thought it was white,
) lead from the monitor needs to be carefully tapped to the Primary O2 signal wire, which is D7 white on the ecu harness. The black lead from the monitor needs to be ran to a known good ground, and the bare silver stranded wire (cable shield) should also be ran to same ground.
By "gray wire", are you referring to the gray lead from the monitor cable? I'm not sure what exactly you mean by "directly connected to the cat". The "gray" (I thought it was white,
) lead from the monitor needs to be carefully tapped to the Primary O2 signal wire, which is D7 white on the ecu harness. The black lead from the monitor needs to be ran to a known good ground, and the bare silver stranded wire (cable shield) should also be ran to same ground.
10-07-2003, 02:54 PM
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Well did it all today as you've instructed and it worked GREAT! When the JRSC was installed the shop who did it tried to make everything work. They got everything except the J&S and did install the dual monitor but totally WRONG! they wired it to the o2 sensor on the header o2. This made my engine light come on and i had to disconnect it and wire it up as you instructed. Definitly thank you and couldnt of come close to doing it with out your help. Good to see theres people out there willing to help from what they learned. But the air/fuel guage works but nothing on the knowck sensor. I didnt drive the car, just reved it because its to low to pull out right now, im gonna test it tomorrow but is that why the knock sensor part of the gauge didnt work?(because it wasnt being pushed to boost) O ran ran the car for a while like before and this time no codes so, it seems were good so far, let you know tomorrow.