Outside 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 OUTSIDE KEY ANTENNA INPUT SIGNAL

Turn ignition switch OFF.

Check signal between Intelligent Key unit connector M42 terminals 17, 19, 37 and ground with an oscilloscope.

Connector	Item	Terminals		Condition	Signal (Reference value)
Connector	Item	(+)	(-)	Condition	Signal (Reference value)
M42	Rear bumper antenna	17	Ground	Request switch is pushed
	Front outside antenna LH	19
	Front outside antenna RH	37

Fig 1: Checking Outside Key Antenna Input Signal

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: Outside key antenna is OK.

NG: GO TO 2.

CHECK OUTSIDE KEY ANTENNA CIRCUIT

Disconnect Intelligent Key unit connector and outside key antenna connector.

Check continuity between each outside key antenna harness connector D4 (B) (LH) or D103 (B) (RH), rear bumper antenna connector B49 (C) terminals 1, 2 and Intelligent Key unit harness connector M42 (A) terminals 17, 18, 19, 20, 37, and 38.

Item	Connector	Terminal	Connector	Terminal	Continuity
Rear bumper antenna	C: B49	1	A: M42	17	Yes
Rear bumper antenna	C: B49	2		18
Front outside antenna LH	B: D4	1		19
Front outside antenna LH	B: D4	2		20
Front outside antenna RH	B: D103	1		37
Front outside antenna RH	B: D103	2		38

Check continuity between each outside key antenna harness connector terminals 1, 2 and ground.

Item	Connector		Terminal	Continuity
Rear bumper antenna	C: B49	1	Ground	No
Rear bumper antenna	C: B49	2
Front outside antenna LH	B: D4	1
Front outside antenna LH	B: D4	2
Front outside antenna RH	B: D103	1
Front outside antenna RH	B: D103	2

Fig 2: Checking Outside Key Antenna Circuit

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 3.

NG: Replace harness between outside key antenna and Intelligent Key unit.

CHECK OUTSIDE KEY ANTENNA POWER SUPPLY

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

Check signal between Intelligent Key unit connector terminals 17, 19, 37 and ground with an oscilloscope.

Connector	Item	Terminals		Condition	Signal (Reference value)
Connector	Item	(+)	(-)	Condition	Signal (Reference value)
M42	Rear bumper antenna	17	Ground	Request switch is pushed
	Front outside antenna LH	19
	Front outside antenna RH	37

Fig 3: Checking Outside Key Antenna Power Supply

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: Replace outside key antenna.

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