Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. 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.

2. CHECK NATS ANTENNA AMP. CIRCUIT 
   1. Disconnect BCM connector and NATS antenna amp. connector.
   2. 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

   3. 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.

   NO: Repair or replace harness.

3. CHECK NATS ANTENNA AMP INPUT SIGNAL 1 
   1. Turn ignition switch ON.
   2. 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
      			When Intelligent Key is not in the antenna detection area

   Is the inspection result normal? 

   YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

   NO: Replace NATS antenna amp. Refer to "REMOVAL AND INSTALLATION ".