Nissan Murano: Security Control System :: Dtc/circuit Diagnosis / P1612 Chain of Ecm-Immu

Nissan Murano (Z52) 2015-2024 Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Security Control System :: Dtc/circuit Diagnosis / P1612 Chain of Ecm-Immu

DTC Description

DTC DETECTION LOGIC

NOTE:

  • If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Description.

  • If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Description.

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC Detection Condition
P1612

CHAIN OF ECM-IMMU

(Chain of engine control module - immobilizer unit)
Diagnosis condition When ignition switch ON.
Signal (terminal)
Threshold Inactive communication between BCM and ECM
Diagnosis delay time

POSSIBLE CAUSE

  • ECM

  • Harness or connector

    (The CAN communication line is open or shorted.)

  • BCM

FAIL-SAFE

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

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

  3. Check DTC.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

Inspection End.

Diagnosis Procedure

NOTE:

  • If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Description.

  • If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Description.

CHECK BCM POWER SUPPLY AND GROUND CIRCUIT.

Check BCM power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace the harness.

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT.

Check ECM power supply and ground circuit. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace the harness.

PERFORM DTC CONFIRMATION PROCEDURE.

Perform the DTC confirmation procedure. Refer to DTC Confirmation Procedure.

Does the DTC return?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Inspection End.

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    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...

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