Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CONNECTOR INSPECTION
1. Disconnect BCM and NATS antenna amp.
2. Check connectors and terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace as necessary.

CHECK NATS ANTENNA AMP. CIRCUIT

Disconnect BCM connector and NATS antenna amp. connector.

Check continuity between BCM harness connector and NATS antenna amp. harness connector.

BCM		NATS antenna amp.		Continuity
Connector	Terminal	Connector	Terminal
M80	126	M21	3	Yes
	127		1

Check continuity between BCM harness connector and ground.

BCM		Ground	Continuity
Connector	Terminal
M80	126		No
	127

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness.

CHECK NATS ANTENNA AMP. INPUT SIGNAL

Turn ignition switch ON.

Check signal between BCM harness connector and ground using oscilloscope.

(+)		(-)	Condition	Signal (Reference value)
BCM
Connector	Terminal
M80	126, 127	Ground	When Intelligent Key is in the antenna detection area	Courtesy of NISSAN NORTH AMERICA, INC.
			When Intelligent Key is not in the antenna detection area	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Replace NATS antenna amp. Refer to Removal and Installation .