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Old April 9th, 2019, 15:53   #1
Join Date: Aug 2018
Location: TUNISIA
TDI(s): 66kw AHU
Default Modulating piston displacement sensor voltage

I have a passat b5 tdi 90 engine code AHU.i did a scan to verify the engine health.
in measuring block 001 i set the IQ to 4.6 using the hammer mod but the Modulating piston displacement sensor voltage is 1.42v.should i set the IQ higher to reach the minimun sensor voltage of 1.450v? the throttle response is already weak!!
other question concerning block 13 for soft idle running, the IQ for cylinder 04 is not shown in field 04!!! any help please?

Last edited by slim74; April 10th, 2019 at 02:07.
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Old April 14th, 2019, 07:41   #2
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Join Date: Aug 2009
Location: Lompoc, CA

On the AHU cylinder 4 IQ is not displayed. The other three are relative to cylinder 4. In other words whatever 4 is +/- the displayed value for that cylinder. That's what I've read here anyway. Not sure if I've seen it in any official document.

Can't help you on the QA voltage.

You'll probably get more response if you post this in the A3/B4 Forum. They got the AHU engine over here.
Saying no to gas for 25 years:

Current: 02 Jetta, Auto; 98 Jetta, 5 Spd; 98 Dodge, 5 Spd, SB, 4x4; 84 Grand Wagoneer with Nissan SD33T, NV4500, Dana 300, Reverse Cut Dana 44, Dana 60

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Past: 85 Mitsubishi PU, 4D55T; 81 Rabbit, 1.6; 80 Dasher, 1.5; 79 Rabbit, 1.5
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