4. Check Stop Lamp Switch Input Signal Circuit For Open And Short

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.

Disconnect ECM harness connector.
Disconnect stop lamp switch harness connector.
Check harness continuity between ECM terminal 106 and stop lamp switch terminal 2.

Fig 1: Identifying Stop Lamp Switch
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to WIRING DIAGRAM .

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

OK or NG

OK: GO TO 6. CHECK STOP LAMP SWITCH .
NG: GO TO 5.