Inside Key Antenna Check

NOTE: The Signal Tech II tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

Check Intelligent Key relative signal strength
Confirm vehicle Intelligent Key antenna signal strength

CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

Turn ignition switch OFF.

Check signal between Intelligent Key unit connector and ground with an oscilloscope.

Connector	Item	Terminals		Condition Signal	(V) (Reference value)
Connector	Item	(+)	(-)	Condition Signal	(V) (Reference value)
M42	Rear parcel shelf antenna	33	Ground	Any door is open → All doors are closed
	Front console antenna	15	Ground	Ignition switch is pushed.
	Instrument panel antenna	13	Ground	Ignition switch is pushed.

Fig 1: Checking Inside Key Antenna Power Supply Signal

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: Inside key antenna is OK.

NG: GO TO 2.

CHECK INSIDE KEY ANTENNA

Disconnect Intelligent Key unit connector and inside key antenna connectors.

Check continuity between inside key antenna harness connector M25 (B) (instrument panel), B18 (B) (front console), B45 (B) (rear parcel shelf) terminals 1, 2 and Intelligent Key unit harness connector M42 (A) terminals 13, 14, 15, 16, 33 and 34.

Item	Connector	Terminal	Connector	Terminal	Continuity
Instrument panel antenna	B: M25	2	A: M42	13	Yes
Instrument panel antenna	B: M25	1		14
Front console antenna	B: B18	1		15
Front console antenna	B: B18	2		16
Rear parcel shelf antenna	B: B45	1		33
Rear parcel shelf antenna	B: B45	2		34

Check continuity between Intelligent Key unit harness connector M42 (A) terminals 13, 14, 15, 16, 33, 34 and ground.

Item	Connector	Terminals		Continuity
Intelligent Key unit	A: M42	13	Ground	No
		14
		15
		16
		33
		34

Fig 2: Checking Inside Key Antenna

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 3.

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

CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

Replace inside key antenna. (New antenna or other antenna)
Connect Intelligent Key unit connector.

Check signal between Intelligent Key unit connector and ground with oscilloscope.

Connector	Item	Terminals		Condition Signal	(V) (Reference value)
Connector	Item	(+)	(-)	Condition Signal	(V) (Reference value)
M42	Rear parcel shelf antenna	33	Ground	Any door is open → All doors are closed
	Front console antenna	15	Ground	Ignition switch is pushed.
	Instrument panel antenna	13	Ground	Ignition switch is pushed.

Fig 3: Checking Inside Key Antenna Power Supply Signal

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: Replace inside key antenna.

NG: Replace Intelligent Key unit. Refer to , "REMOVAL AND INSTALLATION OF INTELLIGENT KEY UNIT ".