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I'm having a problem with the power door locking system on my 2011 Toyota Highlander.

To put it simply: Un-locking the doors with the power lock system works fine, but locking the doors with the power lock system doesn't work.

Details:

The usual actions that would trigger the doors to un-lock are working correctly:

  • Shifting into Park
  • Pressing the Unlock rocker switch on the driver's door
  • Clicking the Unlock button on the remote fob (twice)

Each of these actions causes all 4 doors to unlock. So un-locking is normal.

However, the corresponding actions that should cause the doors to lock, do not work.

  • Shifting out of Park
  • Pressing the Lock rocker switch on the driver's door
  • Clicking the Lock button on a remote fob

Currently, none of those actions cause the doors to lock.

One other related piece of information: Locking the doors with the remote fob would ordinarily produce a single beep from the alarm system, if everything were working normally. Currently, I do not hear a beep when I push the Lock button on the fob. This makes sense, since the doors are not locking.

BUT, if I manually lock each of the 4 doors from the inside (i.e., flip the locks one by one on the doors), and then click the Lock button on the fob, I do hear the single beep.

Any advice on how I can troubleshoot this further?

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