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Backup camera alarm

Discussion in '2011-2016 My Ford Touch / In Vehicle Technology' started by Clippers, January 5, 2014.

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  1. Clippers

    Clippers New Member

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    After I drove home in a snow storm last night I noticed that when I put it into reverse the camera comes on with an un-obstructive view but the red area lights up and the alarm sounds. Its still cold out so there's still a lot of ice and snow on the back of the vehicle. Are there sensors that could be covered up making the alarm sound? I don't have a garage and I don't really want to beat the ice off of a brand new Explorer. If I knew where a sensor could be and was covered up and causing the problem, I could just clean that area. Any ideas? Thanks.
     
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  3. VandyCWG

    VandyCWG New Member

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    The sensors are in/under the rear bumper cover. Should be 3 or 4 sensors total.
     
  4. dco43054

    dco43054 Well-Known Member

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    That would be a good idea.
     
  5. peterk9

    peterk9 Staff Member Moderator Elite Explorer

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    There are 2 sensors on the flat part of the bumper located above the cutout for the tow package. Then there is one on each corner that are used for the 'cross traffic alert' system.

    Peter
     

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  6. omar302

    omar302 Active Member

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    All the four sensors are for the backup alarm. The "Cross Traffic Alert" system uses radar sensors just behind the rear wheel wells (behind the rear bumper panel}.

    This is from the 2012 Explorer owners manual.
     
  7. peterk9

    peterk9 Staff Member Moderator Elite Explorer

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    Those are for the BLIS system and I'm aware of those. They have nothing to do with the Cross Traffic Alert which is used when in Reverse. While it is true that all 4 are involved in some way with the 'backup alarm', the two in the middle provide the coloured zones that the camera displays and that the OP was concerned about.

    Peter
     
  8. Riley

    Riley Active Member

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    Actually the BLIS and CTA use the same sensors behind the bumper cover and the rear wheels.

    An excerpt from the shop manual:


    "The CTA system utilizes the same SOD-L and SOD-R as the BLIS®.

    When the transaxle is in REVERSE (R), the CTA system is active. The driver is warned of an approaching vehicle when an audio alert chime from the parking aid speaker sounds, the right or left exterior mirror BLIS®/Cross Traffic Alert (CTA) amber LED flashes, and the message center displays CROSS TRAFFIC VEHICLE COMING FROM RIGHT or CROSS TRAFFIC VEHICLE COMING FROM LEFT to warn the driver from which direction the vehicle is approaching."

    SOD= Side Obstacle Detection Module
     
  9. peterk9

    peterk9 Staff Member Moderator Elite Explorer

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    Here is what the Owner's Guide states;

    Using the Systems
    BLIS® turns on when the engine is started and the vehicle is driven
    forward above 3 mph (5 km/h); it remains on while the transmission is in
    D (Drive) and N (Neutral).
    If shifted out of D (Drive) or N (Neutral),
    the system enters CTA mode. Once shifted back into D (Drive), BLIS®
    turns back on when the vehicle is driven above 3 mph (5 km/h).
    Note: BLIS® does not function in R (Reverse) or P (Park) or provide
    any additional warning when a turn signal is on.


    Peter
     
  10. Riley

    Riley Active Member

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    That's exactly correct. However, both systems use the same sensors to alert you. In Drive, BLIS uses them. In Reverse, CTA uses them.
     
  11. Clippers

    Clippers New Member

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    Thank you all for your help. When I get home tonight I'll try to get it cleared off. Thanks again.
     
  12. anonymous

    anonymous Member

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    I think you can also turn them off for a little while thru the settings on the menu.
     
  13. Clippers

    Clippers New Member

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    Well I cleaned off the bumper where the sensors were, problem solved. Thanks, especially for the pic peterk9.
     
  14. omar302

    omar302 Active Member

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    I know other have already clarified this, but so you can make sure, the back up warning in the rear camera display shows four different squares (with different colors), each square represents one of the four sensors. To test it, open the windows (to hear the alarm), turn on the vehicle (no need to run the engine) & put the vehicle in reverse. You can then test each sensor (especially the ones on the side) by waving you hand in front of it. The screen & sound alert will clearly show you that all four sensors are used for the backup alarm.
     
  15. Lewisra

    Lewisra Active Member

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    My arms aren't that long, but I'll take your word for it. :eek:
     
  16. peterk9

    peterk9 Staff Member Moderator Elite Explorer

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    I believe the OP's original post concerned the fact that the RED zone was lighting up although the area directly behind him was clear. The 2 sensors mounted on the flat part of the bumper control and activate the GREEN, YELLOW and RED zones. That was was the post was about. The 2 corner ones are part of the Cross Traffic Alert system and only alert you of things in the zone on the right or left of the vehicle. I don't think anyone was disputing that all 4 sensors are active when the vehicle is in Reverse.

    Peter
     
  17. peterk9

    peterk9 Staff Member Moderator Elite Explorer

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    You are welcome. I have built up quite an album of various pictures over the past few years. Many of them were taken to address various posts.

    Peter
     

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