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Thread: Fault codes

  1. #1
    Regular Member conman's Avatar
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    Default Fault codes

    Hey guys, not the most technical minded and need a bit of help with the meaning of these fault codes if some kind soul could interpret them.
    I have a "Check Safeguard" warning for a while now and was wondering if one of these codes have something to do with it. I had checked internal sensors by not activating them and made no difference plus the alarm works fine and not going of randomly etc. Also if I don't lock the car and don't activate the alarm the "Check Safeguard" warning still comes up every time I put in the key and turn the ignition on. Just for reference I have a 2002 Vectra C 2.2 DTI 16v and the head unit is removed as I use my own stereo.

    Here's the codes I'm getting:

    U2105-71 CAN-Bus ECM Message Range/Performance (This one keeps coming back after code cleared)
    B3916-0F No Communication With Alarm Siren
    B3596-00 Invalid Trouble Code Please Ignore!
    B1375-00 Switched System Voltage (Ignition ON) Circuit Malfunction
    B3974-05 Driver Door Select Switch Window Lifter Circuit Open or High Voltage (Present)
    B1325-03 System Voltage Low Voltage
    U1420-04 Radio Bus Communication SDA open (Present)
    U1421-04 Radio Bus Communication SCL open (Present)
    U1422-04 Radio Bus Communication MRQ open (Present)

    B3608-06 <Unknown DTC>

  2. #2
    Regular Member fistymus's Avatar
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    Default

    B3916-0F No Communication With Alarm Siren

    Most likely the culprit, as per here:

    http://www.vectra-c.com/forum/showth...light=B3916-0F

  3. #3
    Regular Member conman's Avatar
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    Default

    Cheers mate, will check the fuses and the battery backup in the sounder and see if I discover anything. Any ideas what the other codes are or would these all be because of the "Check Safeguard" error?

  4. #4
    Regular Member conman's Avatar
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    Default

    I went out and took a photo, I checked all the fuses and they were all ok. Can anyone tell me if this looks right? Seems like there are a load of fuses missing.


  5. #5
    Regular Member DTi Elite's Avatar
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    Default

    there will be fuses missing as different models have different equipment , so have fuses in different slots .

  6. #6
    Regular Member fistymus's Avatar
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    Default

    B1375-00 Switched System Voltage (Ignition ON) Circuit Malfunction
    ...and...
    U1420-04 Radio Bus Communication SDA open (Present)
    U1421-04 Radio Bus Communication SCL open (Present)
    U1422-04 Radio Bus Communication MRQ open (Present)

    The top one is likely due to the missing original head (They have the ignition On/Off setting)

    The bottom three deffo are.

    From odb-codes.com:

    U2105:
    When the ECM stops communicating, the SOH that is normally sent every 2 seconds, disappears. The module that should receive that message detects the absence of the message and in turn sets DTC U2105.

  7. #7
    Regular Member conman's Avatar
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    Default

    Quote Originally Posted by fistymus View Post

    The bottom three deffo are.

    From odb-codes.com:

    U2105:
    When the ECM stops communicating, the SOH that is normally sent every 2 seconds, disappears. The module that should receive that message detects the absence of the message and in turn sets DTC U2105.
    So don't this just mean a communication error between the ECU and the interface or something more serious?

  8. #8
    Regular Member fistymus's Avatar
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    Default

    Could be a bad connection... Time for switch cleaner methinks

  9. #9
    Regular Member conman's Avatar
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    Default

    I think you might be right mate, I know I have some somewhere

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