Infiniti QX56 (Z62). Manual - part 1166

SEC-54

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1611 ID DISCORD, IMMU-ECM

P1611 ID DISCORD, IMMU-ECM

DTC Logic

INFOID:0000000006226204

DTC DETECTION LOGIC

NOTE:
• If DTC P1611 is displayed with DTC U1000 (for BCM), first perform the trouble diagnosis for DTC U1000.

Refer to 

BCS-70, "DTC Logic"

.

• If DTC P1611 is displayed with DTC U1010 (for BCM), first perform the trouble diagnosis for DTC U1010.

Refer to 

BCS-71, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-54, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226205

1.

PERFORM INITIALIZATION

Perform initialization of BCM and reregistration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

Can the system be initialized and can the engine be started with reregistered Intelligent Key?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK SELF DIAGNOSTIC RESULT

1.

Select “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.

2.

Erase DTC.

3.

Perform DTC CONFIRMATION PROCEDURE for DTC P1611. Refer to 

SEC-54, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 3.

NO

>> INSPECTION END

3.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

Can the system be initialized and can the engine be started with registered Intelligent Key?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

REPLACE ECM

1.

Replace ECM. Refer to 

EC-535, "Removal and Installation"

.

2.

Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to 

EC-143, "Work Procedure"

.

>> INSPECTION END

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.

• Harness or connectors

(The CAN communication line is open 
or shorted.)

• BCM
• ECM

P1612 CHAIN OF ECM-IMMU

SEC-55

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

P1612 CHAIN OF ECM-IMMU

DTC Logic

INFOID:0000000006226206

DTC DETECTION LOGIC

NOTE:
• If DTC P1612 is displayed with DTC U1000 (for BCM), first perform the trouble diagnosis for DTC U1000.

Refer to 

BCS-70, "DTC Logic"

.

• If DTC P1612 is displayed with DTC U1010 (for BCM), first perform the trouble diagnosis for DTC U1010.

Refer to 

BCS-71, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-55, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226207

1.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

Can the system be initialized and can the engine be started with registered Intelligent Key?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ECM

1.

Replace ECM. Refer to 

EC-535, "Removal and Installation"

.

2.

Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to 

EC-143, "Work Procedure"

.

>> INSPECTION END

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

SEC-56

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1614 CHAIN OF IMMU-KEY

P1614 CHAIN OF IMMU-KEY

DTC Logic

INFOID:0000000006226208

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE 1

1.

Contact Intelligent Key backside to push-button ignition switch.

2.

Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-56, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE 2

1.

Press the push-button ignition switch.

2.

Check DTC in “Self Diagnostic Result” mode of “ENGINE” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226209

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check that the following fuse in IPDM E/R is not blown.

Is the fuse fusing?

YES

>> Replace the blown fuse after repairing the cause of blowing.

NO

>> GO TO 2.

2.

CHECK NATS ANTENNA AMP. POWER SUPPLY

1.

Disconnect NATS antenna amp. connector.

2.

Check voltage between NATS antenna amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK NATS ANTENNA AMP. POWER SUPPLY CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

Check continuity between IPDM E/R harness connector and NATS antenna amp. connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1614

CHAIN OF IMMU-KEY

Inactive communication between NATS 
antenna amp. and BCM

• Harness or connectors

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

• NATS antenna amp.
• IPDM E/R

Signal name

Fuse No.

Battery power supply

43

(+)

(–)

Voltage (V)

(Approx.)

NATS antenna amp.

Connector

Terminal

M26

1

Ground

Battery voltage

P1614 CHAIN OF IMMU-KEY

SEC-57

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3.

Check continuity between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 1

1.

Connect NATS antenna amp. connector.

2.

Disconnect BCM connector.

3.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 1

1.

Disconnect NATS antenna amp. connector.

2.

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

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Replace NATS antenna amp. Refer to 

SEC-155, "Removal and Installation"

.

NO

>> Repair or replace harness.

6.

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 1

1.

Connect BCM connector.

2.

Check voltage between BCM harness connector and ground using analog tester.

Is the inspection result normal?

IPDM E/R

NATS antenna amp.

Continuity

Connector

Terminal

Connector

Terminal

E14

42

M26

1

Existed

IPDM E/R

Ground

Continuity

Connector

Terminal

E14

42

Not existed

(+)

(–)

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M68

21

Ground

12

BCM

NATS antenna amp.

Continuity

Connector

Terminal

Connector

Terminal

M68

21

M26

2

Existed

BCM

Ground

Continuity

Connector

Terminal

M68

21

Not existed

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M68

21

Ground

Contact Intelligent Key backside to 
push-button ignition switch, then turn 
ignition switch ON.

Just after pressing push-button ignition 
switch, pointer of analog tester should 
move.