5. Check PNP Switch Input Signal Circuit For Open And Short-I

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF.
Disconnect TCM harness connector.

Fig 1: Identifying ECM & TCM
Courtesy of NISSAN MOTOR CO., U.S.A.
Disconnect fuse block (J/B) No. 1 harness connector.
Check harness continuity between TCM terminal 48 and fuse block (J/B) No. 1 terminal 17D.
Refer to WIRING DIAGRAM .

Continuity should exist.
Also check harness for short to ground and short to power.

OK or NG

OK: GO TO 7. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II .
NG: GO TO 6.