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Old March 14th, 2008, 09:00 AM   #1
boosted
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Default Audi 1.8t Crank and Cam wiring (SM2)

Hi Guys,
I am working on a AEB Audi A4 so I try to prepare '' How to connect Cam And Crank Sensor to SM2. I really don't know if it's correct but pro.'s may chime in and correct if I am wrong.



Robert you may want to put this to download page if It's correct.
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Old March 15th, 2008, 04:41 AM   #2
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Boosted, very nice diagram.

It would be helpful if someone knows what pin numbers these connect to on the factory sensors (i.e. the red wire from the reluctor interface = pin 1 in connector...I don't know if this correct, it's just an example).

I believe both sensors are 3 pin, so one of the pins in the cyl. pulse connector is a shield...right?
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Old March 15th, 2008, 05:28 PM   #3
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the crank sensor might be wrong. They changed the colors and the pinout several times. All of the wiring I have see the black wire is the shield, therefore un used. Your + and - at the crank sensor connector are either 1 and 2 , or 3 and 2. Use a mulltimeter and measure the Ohms between pins 1-2 and 3-2 , one way will give you ~600-900 ohms and those are your trigger wires. The other way will giv e you open circuit and that means you have the shiels which is unused.
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Old March 17th, 2008, 08:21 AM   #4
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Thanks Kevin for valueble information but the reluctor interface connection is correct ,right ?? One more question ,Do you know how can I find the pins at the cam sensor? I am still working on the drawing ,I will finalaze soon

Last edited by boosted; March 17th, 2008 at 08:25 AM.
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Old March 17th, 2008, 09:10 AM   #5
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What is the Bosch number on your standard ECU?
I may be working on a similar now right now.
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Old March 17th, 2008, 09:31 AM   #6
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my ECU number is : 8D0907558E and the car is 1999 A4 B5 Turbo Quattro
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Old March 17th, 2008, 11:35 AM   #7
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ECU number is not the same. Wiring should be similar though.
According to my manual,

crank sensor 3 wire plug
1 = positive, 2 = negative, 3= shield

Cam sensor 3 wire plug
1 = positive, 2= signal, 3 = sensor ground

Std ECU pinout
Pin 11 - cam sensor postive (green/violet)
Pin 76 - Cams sensor signal (green/grey)
Pin 67 - cam sensor negative (green/white)
Pin 56 - crank sensor positive (green)
Pin 63 - crank sensor negative (blue)
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Old March 17th, 2008, 01:34 PM   #8
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Thanks for the information ''gti'' this will help a lot.
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Old March 17th, 2008, 05:07 PM   #9
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Does anyone know if the sensors are -ve or +ve?
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Old March 17th, 2008, 08:05 PM   #10
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What exactly do you mean?
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