Nissan Murano: Security Control System :: Dtc/circuit Diagnosis / P1614 Chain of Immu-Key

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• NATS antenna amp.

• Harness or connector

  (NATS antenna amp. circuit is open or shorted.)

• BCM

• Intelligent Key fob

FAIL-SAFE

—

PERFORM DTC CONFIRMATION PROCEDURE 1

CONSULT

1. Contact Intelligent Key back side to ignition switch.

2. Select “Self Diagnostic Result” mode of “ENGINE”.

3. Check DTC.

Is DTC detected?

Refer to Diagnosis Procedure.

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE 2

CONSULT

1. Select “Self Diagnostic Result” mode of “ENGINE”.

2. Check DTC.

Is DTC detected?

Refer to Diagnosis Procedure.

Inspection End.

CONNECTOR INSPECTION

1. Disconnect BCM connector and NATS antenna amp. connector.

2. Check connectors and terminals for deformation, disconnection, looseness or damage.

Is the inspection result normal?

GO TO 2.

Repair or replace as necessary.

CHECK NATS ANTENNA AMP. CIRCUIT

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

   BCM		NATS antenna amp.		Continuity
   Connector	Terminal	Connector	Terminal
   M80	126	M218	3	Yes
   	127		1

2. Check continuity between BCM harness connector and ground.

   BCM		Ground	Continuity
   Connector	Terminal
   M80	126		No
   	127

Is the inspection result normal?

GO TO 3.

Repair or replace harness.

CHECK NATS ANTENNA AMP INPUT SIGNAL 1

1. Connect BCM connector and NATS antenna amp. connector.

2. Ignition switch ON.

3. Check signal between BCM harness connector and ground using oscilloscope.

   (+)		(–)	Condition	Signal (Reference value)
   BCM
   Connector	Terminal
   M80	126	Ground	When Intelligent Key is in the antenna detection area.
   	127		When Intelligent Key is not in the antenna detection area.

Is the inspection result normal?

Replace BCM. Refer to Removal and Installation.

Replace NATS antenna amp. Refer to Removal and Installation.