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Old 29-10-2009, 11:40 PM
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Bob the Boss Bob the Boss is offline
Join Date: Oct 2009
Location: Madley in Herefordshire Uk.
Posts: 573
Thumbs up Audi A4 1.8T,4 cyl: code AEB.

Customers complaint, misfire on one cyl:,

The car codes for open circ: injector no 2, N31, on scope found all sigs: at injectors ok, but there is no prim: trace on cyl 3, but B+ only.

Next we did a module check, on output, the ecu drive to the module is ok but it will be noted that the drive sig: from ecu will be there but canbe low .
You may think this is an ecu fault but in fact it is not, if the module has no output the input sig can also be low, fault is module .
Gibbins Motors Technology Uk

The more you know the less you know!!
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