Intermittent power sliding doors not working

Hi and thanks for using 2CarPros.

If the problem is sporadic, there is a good chance it is an electrical component or a wiring problem. I noted you are a mechanic so I am going to provide the testing procedures which I feel may be related to the issue. I will start with the switch. Remember, when you do this test, you may need to move things around a bit to either cause them to fail or work. The attached pictures will correlate with the directions.

_______________________________

Power Sliding Door Switch Test/Replacement

1. Remove the driver's dashboard outer panel.

picture 1
2. Disconnect the 10P connector (A) from the power sliding door switch (B).

picture 2
3. Check for continuity between the terminals in each switch position according to the table.
4. If the continuity is not as specified, replace the bulbs (C) or the switch.

________________________________________

Door Module. Note, it indicates to check for diagnostic trouble codes prior to doing this.

Control Unit Input Test

NOTE: Before performing the input test of the power sliding door system:
- Troubleshoot the multiplex integrated control system using B-CAN System Diagnosis Test Mode A.
- Check for the DTCs with the HDS. If any DTCs are indicated, troubleshoot them first.

Left Power Sliding Door

1. Turn the ignition switch OFF.
2. Remove the left rear side trim panel.

Picture 3

3. Disconnect the 22P, 12P, and 5P connectors (A) from the left power sliding door control unit (B).
4. Inspect all the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 5.

Picture 4

5. Reconnect all connectors to the left power sliding door control unit, and make these input tests at the appropriate connector.
- If the test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, replace the left power sliding door control unit.

Right Power Sliding Door

1. Turn the ignition switch OFF.
2. Remove the right rear side trim panel.

Picture 5

3. Disconnect the 22P, 12P, and 5P connectors (A) from the right power sliding door control unit (B).
4. Inspect all the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 5.

Picture 6

5. Reconnect all connectors to the right power sliding door control unit, and make these input tests at the appropriate connector.
- If the test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, replace the right power sliding door control unit.

_________________________________

Slide motor

Slide Motor Test

1. Remove the rear side trim panel.

Picture 7
2. Disconnect the 2P connector (A) from the slide motor (B).

Pic 8
3. Test the slide motor by connecting power and ground according to the table.
4. If the motor does not operate, replace the motor.

__________________________________

When checking these components, make sure the connections are clean, tight, and free of corrosion. I doubt that you need it, but here are a few links that may be helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Do these tests and let me know the results. If you have other questions, let me know.

Take care,
Joe