Why does my car's doors lock after using the remote to open all the doors

Tiny
PCULQUI
  • MEMBER
  • 2005 TOYOTA SIENNA
  • 3.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 106,000 MILES
The doors don't lock immediately but in about 30 to 60 seconds, they lock. I can have the door(s) opened or closed and the doors lock automatically even before I put the key in the ignition.
When the car is in drive, all the doors lock automatically also.
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Monday, June 29th, 2020 AT 7:29 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The automatic door lock in this vehicle has different modes of operation. I suspect you want it to lock the doors when you shift from park to a drive gear and then unlock when you park and place the shifter back to park. The is mode B.

Here are the directions for programming it to do that. The attached pic correlates with these directions.

______________________________

Initialization Procedure

Perform the following procedure to initialize the ADL function to Mode B.

1. Move the shift lever into the "P" position and close all doors.

2. Turn the ignition switch to the "ON" position.

Pic 1

3. Within 10 seconds after the ignition switch is turned to the "ON" position, push and hold the rear side (unlock position) of the door lock switch for 5 seconds.

4. All doors will automatically lock and unlock when you release the power door lock switch.

This indicates that the ADL function is set to Mode B. If all doors do not lock and unlock, the time the switch was held may have been too short or too long. Perform the procedure over again starting from step 1.

________________________________

Let me know if that helps.

Joe
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Monday, June 29th, 2020 AT 10:20 PM
Tiny
PCULQUI
  • MEMBER
The doors were already in Mode B from the time I purchased the vehicle. I was just asking why do all the doors lock automatically when using remote control to open all the doors. This is even before placing key in the ignition.
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Tuesday, June 30th, 2020 AT 12:57 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
The only thing I can think of then is if there is a short to the ADL prompting it to actuate. What I would suggest is to scan the CAN bus system on the vehicle. CAN stands for computer area network. It should show if there is a break down of communication or a fault specific to any one module in the vehicle.

Here is a quick video showing how and why to do this:

https://youtu.be/InIlnsjOVFA

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Tuesday, June 30th, 2020 AT 9:16 PM

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