Symptom:

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

A/T does not shift from 2 ₂ to 1 ₁ when changing selector lever from 2 to 1 position .

CHECK PNP SWITCH CIRCUIT
With CONSULT-II

Does TCM INPUT SIGNALS in DATA MONITOR show damage to PNP switch circuit?

Without CONSULT-II

Does self-diagnosis show damage to PNP switch circuit?

Fig 1: Checking PNP Switch Circuit (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Yes or No
1. Yes: Check PNP switch circuit. Refer to DTC P070 PARK/NEUTRAL POSITION (PNP) SWITCH .
2. No: GO TO 2.
CHECK SYMPTOM
Check again.

OK or NG
1. OK: INSPECTION END
2. NG:
  1. Perform TCM input/output signal inspection.
  2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.