The back door can be locked/unlocked and opened/closed by the following procedures.
Automatic door locking and unlocking systems
Locking and unlocking the back doorInspection
1. INSPECT MASS AIR FLOW METER
(a) Check the output voltage.
Apply battery voltage across terminals 1 (+B) and 2
(E2G).
Connect the positive (+) tester probe to terminal
VG, and negative (-) tester probe to terminal E2G.
Blow air into the Mass Air Flow (MAF) meter, ...