General 2009 model - rear door warning on dashboard

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General 2009 model - rear door warning on dashboard

The ‘door open’ warning light comes on intermittently and beeps (very irritating) while driving on steep inclines or rough roads. Warning reads : rear doors open!
We can’t determine if the problem is with the two back doors or the sliding door.
Can anyone tell us if the message would say ‘sliding door open’ if the issue is with sliding door?
Locking the van is an issue when the van registers a door being open.
 
Hi Ozwards

The owner's handbook is a bit ambiguous, but my interpretation is that a Left or Right cab door will give one message and a Side or Rear (= load compartment) door will give a different message.

The side door seems to more often be the culprit. There is a plunger switch plus 4 electrical contacts mounted in the bodywork at the trailing edge. Sometimes this responds to being packed out behind with thin plastic, as the metal it's mounted on is thin and prone to bending. From memory it's held with plastic rivets so some proper screws with shallow heads may also help. The metal contact faces can also be cleaned up.

There is another switch within the lock at the rear, but I suspect this wouldn't be activated unless the door was fairly obviously not shut.
 

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