LambdaLink Wiring
14 March 2004, 09:09 PM
#1
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LambdaLink Wiring
Had a good nose around old posts and on 22b, but there's a bit of confusion as to how it's best to wire the LambaLink - specifically the signal ground.
I'm installing it in my MY99 RB5 with an AE801 ECU and standard OE narrowband O2 sensor.
Here's my understanding of what the 4 wires are.
Red - This is a +12v ignition feed.
I have an existing feed from the cigarette lighter that supplies my Knocklink and SPA digital dual Oil Temp/Pressure guage. The gauges are protected by a 250mA in-line fuse (from the SPA gauge).
Is it OK to use this feed or am I at risk of drawing too much current through the cigarette lighter wiring?
Black - This is a chassis/engine ground according to the Link manual.
I have ran additional ground cables, but use a common ground under the steering column for my other gauges. Is this OK to use this again or should I use the additional ground feed I've ran to my ECU bracket? or even take the feed and attach it to the engine block? (I've ran ground feeds to this already).
White - This is the signal wire.
From reading old posts, this should be taken directly from the O2 signal wire on the ECU. B136 Pin 21 (Thanks Judge)
Green - This is the signal -ve wire.
Not sure where to run this to. Some suggest engine block, others to the O2 sensor itself another is the ECU return from the O2 sensor
Anyone fitted the LambdaLink themselves?
Stefan
I'm installing it in my MY99 RB5 with an AE801 ECU and standard OE narrowband O2 sensor.
Here's my understanding of what the 4 wires are.
Red - This is a +12v ignition feed.
I have an existing feed from the cigarette lighter that supplies my Knocklink and SPA digital dual Oil Temp/Pressure guage. The gauges are protected by a 250mA in-line fuse (from the SPA gauge).
Is it OK to use this feed or am I at risk of drawing too much current through the cigarette lighter wiring?
Black - This is a chassis/engine ground according to the Link manual.
I have ran additional ground cables, but use a common ground under the steering column for my other gauges. Is this OK to use this again or should I use the additional ground feed I've ran to my ECU bracket? or even take the feed and attach it to the engine block? (I've ran ground feeds to this already).
White - This is the signal wire.
From reading old posts, this should be taken directly from the O2 signal wire on the ECU. B136 Pin 21 (Thanks Judge)
Green - This is the signal -ve wire.
Not sure where to run this to. Some suggest engine block, others to the O2 sensor itself another is the ECU return from the O2 sensor
Anyone fitted the LambdaLink themselves?
Stefan
Last edited by ozzy; 15 March 2004 at 09:43 AM.
14 March 2004, 09:15 PM
#2
Ecu Specialist
Connect the black and green wire's to the same point, suggest NOT using the cig lighter feed as that is susceptible to interferance, use the ecu power feed in the footwell and ground to te lower ecu mounting stud, you can pick up the signal down there as well as you mentioned.
bob
bob
15 March 2004, 09:18 AM
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Are the pinouts the same for AE801/802? If so, the signal wire you want is B136 Pin 21 (third row down, third wire in from the right, white with silver specks.
15 March 2004, 10:05 AM
#6
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If you go to the ECU for earth and live (I would personally) its B136 24 and 25 respectively.
MB
MB
Last edited by Dark Blue Mark; 15 March 2004 at 10:07 AM.
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15 March 2004, 11:24 PM
#8
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OK,
I'm going to use the following
Red (+12v ignition) - ECU B136 pin 25
White - ECU B136 pin 21
Black & Green - ECU lower mounting bolt
If I suspect a problem (or discrpency) with the grounding, then I'll tap into the ECU ground (B136 pin 24).
What's the best method (idiot instructions please) to check for grounding differences given a small voltage change will affect the AFR display?
Stefan
I'm going to use the following
Red (+12v ignition) - ECU B136 pin 25
White - ECU B136 pin 21
Black & Green - ECU lower mounting bolt
If I suspect a problem (or discrpency) with the grounding, then I'll tap into the ECU ground (B136 pin 24).
What's the best method (idiot instructions please) to check for grounding differences given a small voltage change will affect the AFR display?
Stefan
16 March 2004, 08:48 AM
#9
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I would just use the ECU earth wire anyway, I know a couple of people who had problems with the mounting bolt. I think you have an eath mod though dont you? As long as the ECU one was one you upgraded, it will probably be ok...
I didnt use a fuse either
MB
I didnt use a fuse either
MB
16 March 2004, 11:50 AM
#10
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Thread Starter
Thanks m8.
Yes, I've installed a grounding mod, including one to the ECU mounting bracket. Since a 0.1v descrepency can vary the AFR display output, I'm worried that the earth may cause dodgy readings.
How many wires are on a UK MY99/00 O2 sensor and how are they wired? e.g. if the sensor has earth and signal, do both run directly back to the ECU or is the earth attached to the chassis, zorst, etc..???
My thinking on the bolt was that it's easy to wire up. If I start stripping and soldering onto the ECU wires, it's a bugger to undo and cleanup.
Stefan
Yes, I've installed a grounding mod, including one to the ECU mounting bracket. Since a 0.1v descrepency can vary the AFR display output, I'm worried that the earth may cause dodgy readings.
How many wires are on a UK MY99/00 O2 sensor and how are they wired? e.g. if the sensor has earth and signal, do both run directly back to the ECU or is the earth attached to the chassis, zorst, etc..???
My thinking on the bolt was that it's easy to wire up. If I start stripping and soldering onto the ECU wires, it's a bugger to undo and cleanup.
Stefan
Last edited by ozzy; 16 March 2004 at 11:56 AM.
16 March 2004, 11:55 AM
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Got a feeling there are 3 wires, 2 of which being heater, and the other being signal. I think it earths via the thread contact with the exhaust...
16 March 2004, 11:59 AM
#12
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OK, I'm an idiot when it comes to electrics so how do I go about checking the ground at the ECU bolt and the zorst. I have a multimeter and I'm not afraid to use it
Stefan
Stefan
16 March 2004, 12:35 PM
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can someone please point out where this B136 is in relation to the four plugs running out/into the ecu. i am not very good when it comes to wiring so any help would be great!
16 March 2004, 01:38 PM
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http://www.ravensblade-impreza.com/m...ring/link5.pdf
Look at the bottom of page 33. You should only have 3 plugs, so it sounds like you have a different ECU. What year is your car?
MB
Look at the bottom of page 33. You should only have 3 plugs, so it sounds like you have a different ECU. What year is your car?
MB
16 March 2004, 01:57 PM
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Originally Posted by Dark Blue Mark
http://www.ravensblade-impreza.com/m...ring/link5.pdf
Look at the bottom of page 33. You should only have 3 plugs, so it sounds like you have a different ECU. What year is your car?
MB
Look at the bottom of page 33. You should only have 3 plugs, so it sounds like you have a different ECU. What year is your car?
MB
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