Infiniti QX56 (JA60). Manual — part 847

SEC-34

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2191 DIFFERENCE OF KEY

B2191 DIFFERENCE OF KEY

Description

INFOID:0000000005147096

Performs ID verification through BCM 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:0000000005147097

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-34, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147098

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

>> Mechanical key was unregistered.

NO

>> BCM is malfunctioning.

• Replace BCM. Refer to

BCS-59, "Removal and Installation"

.

• Perform initialization again

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

B2191

DIFFERENCE OF
KEY

The ID verification results between BCM and me-
chanical key are NG. The registration is necessary.

Mechanical key

B2192 ID DISCORD, IMMU-ECM

SEC-35

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2192 ID DISCORD, IMMU-ECM

Description

INFOID:0000000005147099

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:0000000005147100

DTC DETECTION LOGIC

NOTE:

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

SEC-26, "DTC Logic"

.

• If DTC B2192 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-35, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147101

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

B2192

ID DISCORD IMMU-
ECM

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

• BCM
• ECM

SEC-36

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2192 ID DISCORD, IMMU-ECM

>> Inspection End.

B2193 CHAIN OF ECM-IMMU

SEC-37

< COMPONENT 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

Description

INFOID:0000000005147102

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:0000000005147103

DTC DETECTION LOGIC

NOTE:

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

SEC-26, "DTC Logic"

.

• If DTC B2193 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-37, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147104

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

B2193

CHAIN OF ECM-
IMMU

Inactive communication between ECM and BCM

• Harness or connectors

(The CAN communication line is
open or short)

• BCM
• ECM