P38 Range Rover Central Locking Door Lock Actuator Key Switch Test Part 1 E-mail
The Key switch needs to operate correctly if either the EKA code needs to be entered or on early P38's a key fob needs to be Re-synchronised. It often goes unnoticed if the key switch is faulty as it  is not common for it to effect normal operation. The fault could remain unnoticed for months even years. It is not until the vehicle battery has been disconnected and we need to re-sync the key fob or enter the Eka, that we discover the fault.

When a correct code can not be entered it can either be a failed micro switch or the wiring from it. See the wiring diagrams in the top menu.

This test can done with the lock in situ. I have removed it from the door purely for clarity.
Carry out all tests with the Door Lock Actuator Plugs disconnected

With your test leads connected, switch your voltmeter to Continuity or Resistance
Move the Key switch downwards and you will see your meter show continuity or near 0 ohms resistance. If your meter shows anything else then the switch or the actuator arm inside is faulty.

This equates to turning the door lock to the left when the lock actuator is in situ.


 
P38 Range Rover Central Locking Door Lock Actuator Key Switch Test Part 1
 

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