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

Nissan Murano (Z52) 2015-2024 Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Security Control System :: Dtc/circuit Diagnosis / P1614 Chain of Immu-Key

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC Detection Condition
P1614

CHAIN OF IMMU-KEY

(Chain of immobilizer-key) 		Diagnosis condition When ignition switch ON.
Signal (terminal) —
Threshold Inactive communication between NATS antenna amp. and BCM
Diagnosis delay time —

POSSIBLE CAUSE

  • NATS antenna amp.

  • Harness or connector

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

  • BCM

  • Intelligent Key fob

FAIL-SAFE

—

DTC Confirmation Procedure

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?

YES>>

Refer to Diagnosis Procedure.

NO>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE 2

CONSULT

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

  2. Check DTC.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

Inspection End.

Diagnosis Procedure

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?

YES>>

GO TO 2.

NO>>

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?

YES>>

GO TO 3.

NO>>

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?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Replace NATS antenna amp. Refer to Removal and Installation.

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