Old thread resurected.
The MY99 ECU would use an IAM so that it knows how much of the Ignition Advance map to use. Otherwise it would just be applying that map blindly.
The ECU that you refer to are all 99/00 units. 2 for 99 and 1 for 00.
You can log the IAM with ECU explorer but IIRC it does move around for each ECU. So you have to switch on a number of un-named log parameters. You'll spot it when you see it/toggle the right parameter.
I think is starts at 12 and goes to 16. But it's a long time since I played with one.
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