Check Inside Key Antenna

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INSIDE KEY ANTENNA POWER SUPPLY CIRCUIT

Push ignition knob and use an oscilloscope to check voltage waveform between Intelligent Key unit connector M34 terminals 13 (luggage room), 15 (dash board), 35 (dash board) and ground.

Fig 1: Identifying Signal Between Intelligent Key Unit Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

INSIDE KEY ANTENNA POWER SUPPLY CIRCUIT

Terminal (Wire color)		Condition	Signal (Reference value)
(+)	(-)	Condition	Signal (Reference value)
Luggage room: 13 (P)	Ground	Push ignition knob.	Courtesy of NISSAN MOTOR CO., U.S.A.
Dash board: 15 (G) 35 (LG)	Ground	Push ignition knob.	Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: GO TO 3.

CHECK INSIDE KEY ANTENNA OPERATION
1. Disconnect inside key antenna connector.
2. Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room) terminals 1 and 2.
  1 - 2 : Continuity should exist.
  
  Fig 2: Identifying Continuity Between Inside Key Antenna Connector M70, M153 , B68 Terminals 1 And 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 3.

NG: Replace malfunctioning inside key antenna.

CHECK INSIDE KEY ANTENNA

Disconnect Intelligent Key unit connector.

Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room) terminals 1, 2 and Intelligent Key unit connector terminals 13, 14, 15, 16, 35 and 36.

Fig 3: Identifying Inside Key Antenna

Courtesy of NISSAN MOTOR CO., U.S.A.

INSIDE KEY ANTENNA

Item	Terminal		Continuity
Inside key antenna-3 (Luggage room)	1 (OR/L)	13 (P)	Yes
Inside key antenna-3 (Luggage room)	2 (W/L)	14 (L)
Inside key antenna-1 (Dash board)	1 (G)	15 (G)
Inside key antenna-1 (Dash board)	2 (R)	16 (R)
Inside key antenna-2 (Dash board)	1 (LG)	35 (LG)
Inside key antenna-2 (Dash board)	2 (PU)	36 (PU)

Check continuity between inside key antenna connector M70, M153 (dash board), B68 (luggage room) terminals 1 and 2 and ground.

INSIDE KEY ANTENNA, DASH BOARD, LUGGAGE ROOM AND GROUND

Item	Terminal		Continuity
Inside key antenna-3 (Luggage room)	1 (OR/L)	Ground	No
Inside key antenna-3 (Luggage room)	2 (W/L)
Inside key antenna-1 (Dash board)	1 (G)
Inside key antenna-1 (Dash board)	2 (R)
Inside key antenna-2 (Dash board)	1 (LG)
Inside key antenna-2 (Dash board)	2 (PU)

OK or NG

OK: Replace Intelligent Key unit.

NG: Repair or replace harness between inside key antenna and Intelligent Key unit.