Lower the back door using either back door handle.
Make sure to push the back door down from the outside to close it.
The back door closing assist will activate and the back door will fully close automatically.

Canceling the power back door system (vehicles with a power back door)
Turn the main switch in the glove box off to disable the power back door system.

Power back door switch (vehicles with a power back door)
Adjusting the open position of the back door (vehicles with a
power back door)On-vehicle inspection
NOTICE:
In this section, the terms "cold" and "hot" refer to the temperature of the
coils. "Cold"means approximately
-10 C (14 F) to 50 C (122 F). "Hot" means approximately 50 C (122 F) to 100 C
(212 F).
1. INSPECT IGNITION COIL ASSY (WITH IGNITER) AND PERFORM SPARK TEST
(a) Check for DTCs.
...