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  1. #1
    Join Date
    Jan 2021
    Location
    Edmonton, Alberta
    Posts
    2

    Default 2009 Volvo XC70 Tailgate Open warning

    I have a 2009 Volvo XC70 that is showing me the Tailgate Open Warning in the warning section of the cluster. At the same time the tail gate close button stopped working, the tailgate wiper stopped working and the tailgate defroster stopped working. Seems like quite a coincidence that all thes things stopped working at the same time when the day before everything was working fine. I have tested the relays in the cargo compartment and there is continuity in all 3 relays. When I turn on the rear wiper switch I hear the relay clicking as well as the rear defroster too. All fuses are good and wiring still looks new. Has anyone experienced this issue and found a solution?

  2. #2
    Join Date
    Aug 2017
    Location
    Pleasanton CA USA
    Posts
    484

    Default

    I haven't had that exact problem. But, the fault to concentrate on is the door-open sensor. Why?...because the other glitches are related to it either in software (the other functions are inhibited when the software thinks the door is open), or in the hardware:
    -- wiring (one or multiple wires are compromised, including the one reporting of the door-closed/door-open state). OR
    -- door-open sensor is failing

    Where to start: I would inspect the hinge flex-harness (open one end of the rubber boot), are any wires showing bare copper?

    If that looks OK, I'd next remove the tailgate inner panel to expose the door closure mechanism. If you can locate the door closure sensor wires, short the signal side to ground (power on), and see if the dash display shows door closed -- if so, the sensor is your problem -- either adjust the sensor mechanically to get it triggering, or replace it.
    2013 XC70 T6 Flamenco Red (hers)
    2015 XC70 T6 Seashell Metallic (his)
    past: 13 Volvos going back to '74 242 sedan

  3. #3
    Join Date
    Jan 2021
    Location
    Edmonton, Alberta
    Posts
    2

    Default

    Thanks, I'll give that try and see what happens.
    Thanks!

  4. #4
    Join Date
    Sep 2015
    Location
    colorado
    Posts
    25

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