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Body Control Module BCM: Causes for failure

Discussion in 'Electrical Systems' started by shashanknathani, Feb 15, 2013.

  1. rakesh kushwaha

    rakesh kushwaha Timido

    Messages:
    21
    Kothrud, Pune
    Thanks Shashank and Vj_V1 for you inputs.
    Its been two days i am doing follow up from my side. Today service advisor said still they have not received reply or 'Approval' from company for BCM replacement. Also they do not see any intermediate status of approval process. Warranty staff asked me to wait till tomorrow as he is expecting reply/approval by tomorrow but did not give any reasoning for same :confused:.
    Finger crossed.
    If further delay happens for approval then i am thinking writing to customer service to expedite. cheers.
  2. Prash1407

    Prash1407 Amatore

    Messages:
    68
    Bangalore
    I could not find this link before.
    I have the same issue which I have posted in the link: http://www.teamfiat.com/threads/high-beam-working-but-low-beam-does-not.12652/

    In addition to the above issue, today for the first time, I got the error Airbag failure. As per all the posts, it mostly is a battery issue and I will get it checked.

    Just wondering if both these issues are related. In another thread, I read that the connector switch was replaced which cleared this error.

    Can both of these issues be connected?
  3. royj

    royj Esperto

    Messages:
    1,306
    Trivandrum
    I some how missed this thread. I have been facing the issue of high beam and fog lamps not working on my Punto for the past couple of months. The issue is they sometimes work, sometimes doesn't. Checking with FASS came up with the answer that BCM needs to be replaced. The cost was 21k + labour.
    Thought mine was a unique case, but now see that several others have faced the same issue. Maybe its time FIAT did some RCA and take necessary actions to prevent premature failure of this part.
  4. Italia-Linea

    Italia-Linea Staff Member Janitor

    Messages:
    2,123
    Pune
    First check all the fuses etc. Ask them to replace BCM temporarily from another car and prove that headlights are working fine. If you dont want to spend much on BMC there are tricks to bypass BCM and operate the headlights directly.
    nkrishnap and Ravi like this.
  5. royj

    royj Esperto

    Messages:
    1,306
    Trivandrum
    All fuses and connections were checked. Technicians at Mohandas Motors spent several hours on two occasions trying to diagnose the issue before coming to the conclusion that BCM is at fault. They did not charge me any labour as the issue was not rectified.
    A few others too suggested connecting the headlamps bypassing the BCM. Any pointers in that direction will be helpful.
  6. varin11

    varin11 Superiore

    Messages:
    821
    Mumbai
    Bombay
    Linea 1.3
    My Lineas left side headlight press bulb light (small bulb under low beam) not working... RS Motors explanation BCM issue... without checking the wiring etc... I plan to get it checked outside.
    I have heard People geting BCM repaired outside... by resoldering the dead spots on the BCM board.
  7. varin11

    varin11 Superiore

    Messages:
    821
    Mumbai
    Bombay
    Linea 1.3
    My front left dim light and rear left parking is not working. I got it chkd from electrician and there is no current comin.... according to FSC the BCM problem. The electrician tried connecting direct feom the right dim light bulb.... but both switching off.... after connceting thus this jhugad doesn't apply to Fiat. Now another method is try to get the BCM repaired as one guy in Andheri is doing as oer him.Just for dim light I dont wish to take the risk....
    Any body tried.... BCM or another jugad to make the light work
  8. varin11

    varin11 Superiore

    Messages:
    821
    Mumbai
    Bombay
    Linea 1.3
    Hi....can u let me Knw how to bypass the BCM as my front left dim light and rear left parking light not working.... it switch on for second and thn off...
    --- Double Post Merged, May 18, 2016 ---
    Hi....can u let me Knw how to bypass the BCM as my front left dim light and rear left parking light not working.... it switch on for second and thn off..
  9. Aaron Johns

    Aaron Johns Timido

    Messages:
    3
    Bombay
    Linea 1.4
    The main cause for BCM issues is due to water entering the car. Water mainly enters from the deteriorated windscreen seals and plays havoc with the BCM and the window ECM. If your floor mats are wet or if the roof lining is wet or if you find that your fuse box is damp or moist, take your car to a windscreen specialist and get the windscreen resealed.
    linea4me likes this.

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