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Old 01-11-2007, 02:25 AM   #151
Pakin
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I'll be picking one up soon, and will be planning on using shielded wire.

I'm not exactly clear yet of how the wiring would run, but if it will be grouped with the bulkhead harness or passing by any cluster of active wires, it is very important to use shielded wire to avoid false or inconsistant (or even non-existant) signal results.

If shielded wires causing an issue with the performance of any sensor, the additional wiring may have been improperly spliced of the shielding portion relative to the signal wire. This will in short (no pun intended), cause problems regardless because of interferance and/or shorting depending on respective circuit.

-paK +1
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Old 01-11-2007, 03:16 AM   #152
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cool you will have to post up in here and let me know how the install goes. Take some pics if you can of how you routed the wires.

thanks
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Old 01-18-2007, 07:13 PM   #153
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Default Knock Signal (This is from 04 Service Manual)

Knock




So, Pin 4 of B135 for knock signal.
And Pin 22 is the shielding ground point.

Sorry about the hacked images. My program won't copy a full page to clipboard from a .pdf.

This is the same info as on North Ursalia's Web page

Last edited by bucket7788; 01-18-2007 at 07:19 PM.
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Old 01-18-2007, 07:15 PM   #154
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Default Ign

Ign Coil signal




Pick one of pins 21-24 of B136.

Also same info as North Ursalia's page.
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Old 01-19-2007, 12:03 PM   #155
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Quote:
Originally Posted by PDXTuning View Post
Now for the installation into my Legacy.

Installation is very easy, there are only 4 wired to hook up: power, ground, tach, and knock signal. We just tapped the signals at the stock ECU to keep wire routing to a minimum. I will put up the pinout for anyone who wants to install this as soon as I have a chance to make it all pretty.

I read through all seven pages but didn't see an answer to this question...

How did you hook this up PDX? Did you simply use the wires that came on the knocklite or did you add a shielded wire?


thanks
byron
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Old 01-19-2007, 12:20 PM   #156
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We used the wires that came on the knock light. We have never added sheilded wires to any of the knock light installations we have done.
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Old 01-20-2007, 02:44 AM   #157
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thanks, that's great to hear.
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Old 01-20-2007, 08:00 AM   #158
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Same here. I used the wires that came with the knocklite and tapped at the ECU.

t
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Old 01-20-2007, 09:59 AM   #159
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Can someone confirm for me that the knocklite should cycle through the lites at startup? It doesn't seem to be working. I have it set on maximum sensitivity and never see any lights. Tapping on the block does nothing either. I hooked it up to a constant power and a couple of times it would cycle through the lights but only when I shut off the key.

If I set all 3 rpm points at idle I should surely see a amber occasionally correct?

ps this is on a nissan armada and the rpm signal is connected to the #1 coil wire

Last edited by llajumpvid; 01-20-2007 at 04:27 PM.
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Old 01-23-2007, 09:43 AM   #160
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According to the directions that came with mine.

"When the KnockLite is powered up and receives an RPM signal, the LED's will cycle through Red, Amber and Green."
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Old 01-23-2007, 10:32 AM   #161
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Quote:
Originally Posted by llajumpvid View Post
Can someone confirm for me that the knocklite should cycle through the lites at startup? It doesn't seem to be working. I have it set on maximum sensitivity and never see any lights. Tapping on the block does nothing either. I hooked it up to a constant power and a couple of times it would cycle through the lights but only when I shut off the key.

If I set all 3 rpm points at idle I should surely see a amber occasionally correct?

ps this is on a nissan armada and the rpm signal is connected to the #1 coil wire
Something is wrong with the wiring or the unit (likely wiring). It should cycle through all 3 lights @ startup. Mine blinks red, yellow, then green when I start the motor.

Last edited by shemoves; 06-03-2007 at 01:27 PM.
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Old 01-23-2007, 10:46 AM   #162
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My instructions don't say anything about it cycling through the lights. Thank you for confirming! I found out last night that the rpm signal wire that someone told me was the one to use is probably the wrong one. So you are probably correct the wiring is of issue. I finally found a diagram. The wire I hooked to was the white/blue, same one they used on the dyno. From the information I found last night I should be using the yellow/red wire. The link below is the diagram....i'm a newbe so I can't attach the image....
www .clubtitan.org/forums/attachment.php?attachmentid=20648&d=1169522078

Thank you again for the help! very appreciated.
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Old 02-18-2007, 02:48 AM   #163
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Quote:
Originally Posted by John at J&S View Post
At the J&S end of the cable, we connect the black and the drain wires to the system ground pin, then we connect the white wire to the knock input pin on the unit.

At the other end of the cable, we cut off the black and the shield wires, as they are not used. The white wire is then spliced into the knock signal wire, near the ECU.
Since your explanation is the easiest to understand for a simpleton like myself I'm going to ask you for some clarification. I'm not sure what a J&S unit is but I'm guessing I can just insert the word Knocklight where you use that term.

Here's what I'm getting from your post. I take the ground wire from the Knocklight and the drain wire from the shielded cable to a grounding point. The Knocklight signal wire is spliced to the white wire in the shielded cable which is connected to the ECU @ the other end. So only 1 of the 2 wires and the drain is used in the shielded cable. Am I understanding everything or am I an idiot that has a problem with reading comprehension?

Quote:
Originally Posted by John at J&S View Post
Make sure that you don't cut into the factory shield, as this will short out the knock signal.
I'm guessing this comment was meant to stop people from tapping the ECU's shielded ground wire in the knock sensor circuit and is not referring to the signal wire.

I'm very confident with engine and suspension mods but not so much when it comes to wiring so sorry if these are stupid questions.

BTW, feedback from anyone is welcome.

Thanks
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Old 04-18-2007, 12:26 PM   #164
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Quote:
Originally Posted by coolcougar View Post
Hello,

My knocklite arrived yesterday and I'm getting ready to install it in my 2002 WRX. I don't have a separate knock sensor (I'll probably add one later) so I just want to wire it using the stock sensor for now. In one of his original post Jarrad mentioned that he did all his wiring for his LGT at the ECU. I assume he meant he got the power and ground taps there as well.

I've studied the ECU wiring diagram for the 02' WRX located on North Ursalia's web site (Viewable here) .

My plan is to run all the wires to the ECU and tap the following wires for their respective function:

ECU Connector - Pin# - Content
B135 - (B)9 - Supplies 5V power to several sensors
B135 - (B)4 - Knock sensor signal
B136 - (C)9 - Engine speed (RPM)
B135 - (B)19 - Ground (Sensor)

I just want to confirm with you guys that have installed the knocklight before that what I plan to do will not interfere with any of the other ECU or sensor functions, sensitivity, or accuracy.

As far as grounds go would it be better to use a chassis grounding point or tap one of the ground at the ECU?

Any suggestions, comments, or ideas would be appreciated.

Thanks
I'm installing today and thought I would share my thoughts. I've talked with Jarrad at PDX and he tells me that they calibrate the RPMs by free revving the vehicle at idle. For safety reasons. Also, PDX typically uses a sensitivity of 7. Knowing that experienced tuners set it at that, some of the people on here who use 2 must be getting a lot of false signals.

As for the wiring, a ground is a ground so that should be fine. But this part I don't agree with.

B135 - (B)9 - Supplies 5V power to several sensors

In the Knocklite instruction manual it says 12+ IGN power supply. I don't think this 5V supply is sufficient. That is why I intend to use the A5 connection, 10-13V.
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Old 04-18-2007, 12:42 PM   #165
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Quote:
Originally Posted by WRXShawn View Post
I'm installing today and thought I would share my thoughts. I've talked with Jarrad at PDX and he tells me that they calibrate the RPMs by free revving the vehicle at idle. For safety reasons. Also, PDX typically uses a sensitivity of 7. Knowing that experienced tuners set it at that, some of the people on here who use 2 must be getting a lot of false signals.
I've got mine set at 4 or 5 and it is quite accurate.
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Old 05-31-2007, 12:26 PM   #166
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I had mine set at 1 as the default when I first installed it, imagine my panic when it was blinding red the moment I started up my new engine...
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Old 05-31-2007, 06:18 PM   #167
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I have mine set at 1 and I never see knock @ WOT. Every once and awhile I do get what I think are false readings when cruising @ around 3K. After an ECU reset it doesn't do it as much and gradually gets worse over time which makes me think it could be knock. I need to get a laptop to verify whats actually going on.
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Old 07-12-2007, 11:22 PM   #168
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Will any Bosch Knock sensor for 02-04 WRX be a direct plug into the turboxs knocklite??
I hooked mine up to the stock knock sensor but the thing never flashes. It flashes on start up and for the shift light, but I have tried every sensitivity settings on the knocklite and it never flashes anything.
When I did hook it up I did get the CEL "Knock sensor low input." I reset the ECU and that went away.
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Old 07-13-2007, 02:57 AM   #169
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I wonder if the knock sensor low input means your knocklite is pulling to much power... If it goes through the colors at startup, and the shiftlight works, I'd imagine you just are not getting any knock...that's a good thing

If you really have an urge to see the light, put some 87 in there and step on it...it could end up being a real expensive light test though.
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Old 07-13-2007, 04:10 AM   #170
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^hahaha

So tell me this, if I pick one up, should I expect to get light knock every once in a while? If I got one I could totally see myself watching the light blink once, and freaking out, having it towed into the shop and checked out.
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Old 07-13-2007, 09:23 AM   #171
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Quote:
Originally Posted by shemoves View Post
I wonder if the knock sensor low input means your knocklite is pulling to much power... If it goes through the colors at startup, and the shiftlight works, I'd imagine you just are not getting any knock...that's a good thing

If you really have an urge to see the light, put some 87 in there and step on it...it could end up being a real expensive light test though.

haha, i dont want to see the lights that bad. Does this mean my XPT reflash is just that perfect for my car? I thought I read somewhere that if u put on the most sensitive setting it will flash like its knocking.
I guess I could load a map that I know has some slight knocking if I really wanted to test it out also.
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Old 07-13-2007, 01:27 PM   #172
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Quote:
Originally Posted by 2fast4u616 View Post
^hahaha

So tell me this, if I pick one up, should I expect to get light knock every once in a while? If I got one I could totally see myself watching the light blink once, and freaking out, having it towed into the shop and checked out.
I get imperceptable (other than the light) knock every once and a while, and I think "what the heck?!?!" everytime. I know another guy with one and he does too.

Could it be that most get light knock every once and a while and it's not that big of a deal? Yes. Could it mean both he and I (and prolly others) need to adjust our tunes cause we are slowly deteriorating our motors? Yes.

I think because of the constant-learning nature of the ecu, it makes sense to expect light knock every once in a blue moon.
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Old 07-16-2007, 12:40 AM   #173
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I don't know if you guys have seen this, but this site has wiring diagrams for every subaru made since '05 (go to the diagnostics section for your car):
techinfo.subaru.com/html/index.jsp

I found that to be very handy in hooking up my knock light. Thanks!
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Old 01-12-2008, 07:17 PM   #174
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good find!
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Old 07-09-2008, 10:37 AM   #175
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Thinking about installing one on my '03, I really like that idea of putting it in the vent for primary use as a shift light... but how bright is it?, I want to make sure I can see it out the corner of my eye, anyone else mounted it somewhere other than above the wheel?
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