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Old 04-10-2017, 03:47 PM   #11
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Join Date: Mar 2012
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Door Latch Microswitch Testing


Disconnect battery.
Open door fully and remove T20 Torx screw from bottom of connector.
Push connector up to release the top latch and pull the connector assembly out from door frame.
Push tabs on both sides of the bottom of the connector while pulling it down to unlock the cam.
Inset a flat blade screwdriver and gently pry the cam lock down to fully release it, then separate the door side connector from the car side.










The are 3 connectors inside; the main connector for the larger round pins and 2 smaller connectors. The large connector is designated "S". The small black connector is designated "A". The small white connector is designated "B".

You will be using the S5 pin on the larger connector and the pins on the smaller black connector only.

Set your DVM to continuity check.


1) Door Contact
Place one probe in S5 (common) and the other probe into A8 (you may need to use a paperclip or small wire inserted into the connector as the holes are very small in the 2 smaller connectors).
With the door latch open, you should read continuity.
Use a screwdriver to close the door latch (should look like the picture below).
You should now read no continuity.



Keep the latch closed for now.

2) Inside and Outside Door Handles
Insert one probe into A8 and the other into A3.
With the door latch closed, you should read no continuity.
Pull the inside door handle slightly (not enough to release the door latch) and you should read continuity.
Repeat for the outside door handle (ensure the latch is still closed).

Pull the handle fully to release the door latch, then use the screwdriver to push the latch fully open.
Keep one probe in A3 and place the other into S5.
You should read continuity.

3)Key Cylinder Function
Place one probe into S5 and the other into A2.
You should read no continuity.
Insert the key into the door lock and turn to LOCK position.
You should read continuity.

Place one probe into S5 and the other into A6.
You should read no continuity.
Insert the key into the door lock and turn to UNLOCK position.
You should read continuity.

Repeat for passenger door, minus the lock cylinder test.

Last edited by particlewave; 04-10-2017 at 08:23 PM.
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