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N75 LOW VOLTAGE 2.5 V6 TDI

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by gmac78, Jan 20, 2013.

  1. gmac78
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    gmac78 New Member

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    [Jan 20, 2013]
    Hi guys,

    Im having a problem with low voltage at my N75 which in turn is not allowing the valve to operate and control turbo actuator.

    With ignition on or car running i am seeing around 9.5v. If i disconnect the battery for a few minutes and reconnect, then measure voltage between N75 plug ground wire and positive of battery i am seeing around 11.5- 12v which is what i would expect. As soon as i turn the ignition the voltage drops back to 9.5v.

    I think this is the cause of my no boosting issue but not sure what would cause the voltage to drop back to 9.5v on turning ignition on or starting the engine. I've scanned the ecu for fault codes with an ELM327 and TORQUE PRO APP but not showing anything, which i find strange. Need to find someone with a VAG COM to see what that says.

    Any ideas guys as it's doing my head in?

    Cheers
    #1
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