2001 a4 1.8T - ecu pin out and engine wiring diagram

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Topic: 2001 a4 1.8T - ecu pin out and engine wiring diagram (Read 7068 times)

vtraudt

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	2001 a4 1.8T - ecu pin out and engine wiring diagram « on: January 22, 2021, 10:40:43 AM »

Car is a mess when it arrived, now cleaning up (delete/remove).
No N75 and now wires. Found (I think) wires.
But no +5V (IIRC, N75 has +5V and ECU switches to ground?)

Want to rewire the N75.

Can someone post pinout for the ECU (to find N75 signal wire)?
Can someone post wiring diagram for engine (to find +5V to tap into; I think it is shared with the 2 connectors under the intake manifold).
Also need to wire in a new connector. What pin is getting +5V, which pin gets ECU signal?


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2002 Allroad 2.7T 6spd stage 2
1998 A4 1.8T 5spd stage 3
1996 A4 2.8 auto stock

macxxx

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	Re: 2001 a4 1.8T - ecu pin out and engine wiring diagram « Reply #1 on: January 22, 2021, 03:30:55 PM »

what engine code? B5 or B6 chasis?


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birchbark506

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	Re: 2001 a4 1.8T - ecu pin out and engine wiring diagram « Reply #2 on: January 23, 2021, 07:45:48 AM »

if you got the vin and are in North America send me a pm i can get the wiring diagram


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mdz

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	Re: 2001 a4 1.8T - ecu pin out and engine wiring diagram « Reply #3 on: January 23, 2021, 07:57:16 AM »

This is for AWT engine but basic pinout is the same for all of them.


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vtraudt

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	Re: 2001 a4 1.8T - ecu pin out and engine wiring diagram « Reply #4 on: January 23, 2021, 08:34:20 AM »

Quote from: macxxx on January 22, 2021, 03:30:55 PM

what engine code? B5 or B6 chassis?

2001 B5 A4 quattro manual
Installed cylinder head marking: AMB

Address 01: Engine Labels: 06B-906-018-AWM.clb
Part No: 4B0 906 018 CH
Component: 1.8L R4/5VT G02 0001


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2002 Allroad 2.7T 6spd stage 2
1998 A4 1.8T 5spd stage 3
1996 A4 2.8 auto stock

vtraudt

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	Re: 2001 a4 1.8T - ecu pin out and engine wiring diagram « Reply #5 on: January 23, 2021, 09:00:24 AM »

Quote from: mdz on January 23, 2021, 07:57:16 AM

This is for AWT engine but basic pinout is the same for all of them.

Thank you! Very helpful.

Found:
N75 plug has supply voltage on Pin 1 (will check which pin is 1), shared power on green/yellow wire with N80, N112 and N249.
ECU signal (diagram shows yellow/white; will check what color mine is) on pin 2, going to ECU harness pin 104 (N80 is 65, N112 is 9, N249 is 105).

What should I measure on the ECU wire with just key on, and with N75 activated running vagcom output test?


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2002 Allroad 2.7T 6spd stage 2
1998 A4 1.8T 5spd stage 3
1996 A4 2.8 auto stock

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