Nissan GT-R (R35) · Service Manual BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY

P1612 CHAIN OF ECM-IMMU

INTELLIGENT KEY SYSTEM

P1612

Description


BCM performs the ID verification with ECM that allows the engine to start. Start the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered. BCM starts the communication with ECM if ignition switch is turned ON.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
  • If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Logic.
  • If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Logic.

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P1612
 		CHAIN OF ECM-IMMU
 		Inactive communication between ECM and BCM
  • Harness or connectors
    (The CAN communication line is open or shorted)
  • BCM
  • ECM

 
 DTC CONFIRMATION PROCEDURE

 
 1.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.REPLACE BCM
 
 2.REPLACE ECM