Infiniti QX56 (Z62). Manual - part 1167

SEC-58

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1614 CHAIN OF IMMU-KEY

YES

>> GO TO 7.

NO

>> Replace NATS antenna amp. Refer to 

SEC-155, "Removal and Installation"

.

7.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL 2

1.

Disconnect BCM connector.

2.

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 2

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.

9.

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 2

1.

Connect BCM connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace NATS antenna amp. Refer to 

SEC-155, "Removal and Installation"

.

10.

CHECK NATS ANTENNA AMP. GROUND CIRCUIT

1.

Disconnect NATS antenna amp. connector.

2.

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

Is the inspection result normal?

(+)

(–)

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M68

25

Ground

12

BCM

NATS antenna amp.

Continuity

Connector

Terminal

Connector

Terminal

M68

25

M26

3

Existed

BCM

Ground

Continuity

Connector

Terminal

M68

25

Not existed

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M68

25

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.

NATS antenna amp.

Ground

Continuity

Connector

Terminal

M26

4

Existed

P1614 CHAIN OF IMMU-KEY

SEC-59

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

YES

>> GO TO 11.

NO

>> Repair or replace harness.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

SEC-60

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2192 ID DISCORD, IMMU-ECM

B2192 ID DISCORD, IMMU-ECM

DTC Logic

INFOID:0000000006226210

DTC DETECTION LOGIC

NOTE:
• If DTC B2192 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B2192 is displayed with DTC U1010, 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 “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-60, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226211

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-DIAGNOSIS RESULT

1.

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

2.

Erase DTC.

3.

Perform DTC CONFIRMATION PROCEDURE for DTC B2192. Refer to 

SEC-60, "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 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 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

B2192

ID DISCORD BCM-ECM

The ID verification results between 
BCM and ECM are NG.

• Harness or connectors

(The CAN communication line is open 
or shorted.)

• BCM
• ECM

B2193 CHAIN OF ECM-IMMU

SEC-61

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2193 CHAIN OF ECM-IMMU

DTC Logic

INFOID:0000000006226212

DTC DETECTION LOGIC

NOTE:
• If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B2193 is displayed with DTC U1010, 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 “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-61, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226213

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

B2193

CHAIN OF BCM-ECM

Inactive communication between BCM 
and ECM

• Harness or connectors

(The CAN communication line is open or 
shorted.)

• BCM 
• ECM