Trouble reading my ECU with bench harness.

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Rick

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	Trouble reading my ECU with bench harness. « on: October 02, 2010, 03:04:26 PM »

Well today i finally managed to sort out a bench harness to try and read my ECU.

Regulated bench supply, 13.8V with 1A current limit set.

I used pin 62 as the ignition live, pin 43 Kline pin 3 as the permanent live and pin 1 as the ground.

I think I am getting it into boot mode, as if i don't ground pin24 of the 400BB flash, Galletto says boot mode not active. If i do put it in boot mode, it says reading ECU, waits about 40s then gives me a read error, code 200000. Have I got pins 62 and 3 the right way round? I think I must as i'm getting it into boot mode i think.

Any ideas?

Rick


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Tony@NefMoto

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2001.5 Audi S4 Stage 3

	Re: Trouble reading my ECU with bench harness. « Reply #1 on: October 02, 2010, 03:09:24 PM »

Here is how my bench harness is setup:
Pin 1 ground
Pin 2 ground
Pin 3 switched ignition 12v from terminal 15
Pin 43 k-line
Pin 62 constant 12v battery power from terminal 30


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Rick

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	Re: Trouble reading my ECU with bench harness. « Reply #2 on: October 03, 2010, 06:03:33 AM »

I will switch pin 3 and 62, but i think i'm getting boot mode.

I only used one of the ground pins, assumed they were both common points?

Rick


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Tony@NefMoto

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2001.5 Audi S4 Stage 3

	Re: Trouble reading my ECU with bench harness. « Reply #3 on: October 03, 2010, 10:40:27 AM »

Both grounds should be connected.

Are you grounding a pin on the ECU circuit board to trigger boot mode?


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Rick

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	Re: Trouble reading my ECU with bench harness. « Reply #4 on: October 03, 2010, 10:56:56 AM »

yes, pin 24 on the flash.

I will try connecting both grounds


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okkim

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	Re: Trouble reading my ECU with bench harness. « Reply #5 on: July 15, 2012, 01:47:31 AM »

Both grounds are not needed. Neither is the the pin 21 as shown in photos here. It works fine at least with the 551D box.


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