NefMoto > Technical > Flashing and Chipping > Flashed 2003 AVH ECU with 1.8t AWP
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Author Topic: Flashed 2003 AVH ECU with 1.8t AWP  (Read 5121 times)
cliffie55
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« on: July 02, 2020, 04:16:45 AM »
I flashed my 2003 Jetta AVH code ECU with AWP bin file when I did a 1.8t engine swap. The only issue I have is the upstream O2 sensor. I checked wiring, it checks good. Cleaned up grounding points. The O2 sensor is only receiving 4 volts with the key on. Engine running O2 sensor plug pin 4 has less than 1 volt fluctuation(which is correct). Any ideas why O2 sensor codes keep popping up. According to Bently, I am the point where it says replace ECU.
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_nameless
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« Reply #1 on: July 02, 2020, 05:27:06 AM »
They are not the same way it has hardware diffrences
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cliffie55
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« Reply #2 on: July 05, 2020, 09:27:56 AM »
What is the hardware difference between the 2 ECUs?
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« Reply #3 on: July 06, 2020, 03:33:39 AM »
Quote from: cliffie55 on July 05, 2020, 09:27:56 AM
What is the hardware difference between the 2 ECUs?
O2 heater primary circuit
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cliffie55
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« Reply #4 on: July 06, 2020, 07:43:35 AM »
Please elaborate? In the Bentley manual it shows both ECUs using the same pins and same resistance for the wiring through the ecu.
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« Reply #5 on: July 06, 2020, 07:49:19 PM »
Quote from: cliffie55 on July 06, 2020, 07:43:35 AM
Please elaborate? In the Bentley manual it shows both ECUs using the same pins and same resistance for the wiring through the ecu.
On what exactly? The 2l ecu is missing hardware the the 1.8t ecu has
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cliffie55
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« Reply #6 on: July 07, 2020, 12:06:34 PM »
What hardware is it missing?
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fknbrkn
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mk4 1.8T AUM
« Reply #7 on: July 07, 2020, 01:40:21 PM »
Open it and compare with any 1.8t ecu photo
They're different
Some kind of o2 heater curcuit as been said
The chance of anyone spend a hours or a days reversing it and fix 5 bucks ecu are close to 0
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