Infiniti QX56 (JA60). Manual - part 849

SEC-42

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1611 ID DISCORD, IMMU-ECM

P1611 ID DISCORD, IMMU-ECM

Description

INFOID:0000000005197366

BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with

ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start-

ing if the ID is not registered.

DTC Logic

INFOID:0000000005197367

DTC DETECTION LOGIC

NOTE:

• If DTC P1611 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-26, "DTC Logic"

.

• If DTC B1611 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-27, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-42, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005197368

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> ID was unregistered.

NO

>> GO TO 2

2.

PEPLACE BCM

1. Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

2. Perform initialization with CONSULT-III. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.

Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> BCM is malfunctioning.

NO

>> GO TO 3

3.

PEPLACE ECM

1. Replace ECM. Refer to Removal and Installation.

2. Perform initialization with CONSULT-III. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.

Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> ECM is malfunctioning.

NO

>> GO TO 4

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1611

ID DISCORD IMMU-
ECM

The ID verification results between BCM and ECM 
are NG. The registration is necessary.

• BCM
• ECM

P1611 ID DISCORD, IMMU-ECM

SEC-43

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

>> Inspection End.

SEC-44

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1612 CHAIN OF ECM-IMMU

P1612 CHAIN OF ECM-IMMU

Description

INFOID:0000000005197369

BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with

ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start-

ing if the ID is not registered.

DTC Logic

INFOID:0000000005197370

DTC DETECTION LOGIC

NOTE:

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

SEC-26, "DTC Logic"

.

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

SEC-27, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-44, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005197371

1.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

2. Perform initialization with CONSULT-III.

For initialization, refer to “CONSULT-III Operation Manual”.

Does the engine start?

YES

>> BCM was malfunctioning.

NO

>> ECM is malfunctioning.

• Replace ECM.

• Perform ECM re-communicating function.

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 short)

• BCM
• ECM

P1614 CHAIN OF IMMU-KEY

SEC-45

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

P1614 CHAIN OF IMMU-KEY

Description

INFOID:0000000005197372

Performs ID verification through BCM and NATS antenna amplifier when ignition knob switch is pressed.

Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.

DTC Logic

INFOID:0000000005197373

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Insert mechanical key into the key cylinder.

2. Press the ignition knob switch.

3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-45, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005197374

Regarding Wiring Diagram information, refer to 

SEC-80, "Wiring Diagram - IVIS"

.

1.

CHECK NATS ANTENNA AMP. INSTALLATION

Check NATS antenna amp. installation. Refer to 

SEC-120, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Reinstall NATS antenna amp. correctly.

2.

CHECK IVIS (NATS) IGNITION KEY ID CHIP

Start engine with another registered NATS ignition key.
Does the engine start?

YES

>> • Ignition key ID chip is malfunctioning.

• Replace the ignition key.

• Perform initialization with CONSULT-III.

For initialization, refer to “CONSULT-III Operation Manual”.

NO

>> GO TO 3

3.

CHECK POWER SUPPLY FOR NATS ANTENNA AMP.

1. Turn ignition switch ON.

2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1614

CHAIN OF IMMU-
KEY

• Inactive communication between NATS antenna 

amp. and BCM.

• Mechanical key is malfunctioning.

• Harness or connectors

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

• Mechanical key
• NATS antenna amp.
• BCM