Infiniti FX35, FX50 (S51). Manual — part 1658

B2191 DIFFERENCE OF KEY

SEC-45

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2191 DIFFERENCE OF KEY

Description

INFOID:0000000005249440

Performs ID verification through BCM and Intelligent Key when push-button ignition switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of Intelligent Key is used.

DTC Logic

INFOID:0000000005249441

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press the push-button ignition switch.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to

SEC-45, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249442

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Reregister all Intelligent Keys.
For initialization and registration of Intelligent Key. 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.

REPLACE INTELLIGENT KEY

1.

Replace Intelligent Key.

2.

Perform initialization with CONSULT-III.
For initialization and registration of Intelligent Key. 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 3.

3.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2191

DIFFERENCE OF KEY

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

Intelligent Key

SEC-46

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2192 ID DISCORD, IMMU-ECM

B2192 ID DISCORD, IMMU-ECM

Description

INFOID:0000000005249443

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

INFOID:0000000005249444

DTC DETECTION LOGIC

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

SEC-31, "BCM : DTC Logic"

.

• If DTC B2192 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-33, "BCM : DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions.

-

Selector lever is in the P or N position.

-

Do not depress brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to

SEC-46, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249445

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Reregister all Intelligent Keys.
For initialization and registration of Intelligent Key. 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.

REPLACE BCM

1.

Replace BCM. Refer to

BCS-83, "Removal and Installation"

.

2.

Perform initialization with CONSULT-III.
For initialization, 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 3.

3.

REPLACE ECM

1.

Replace ECM. Refer to

EC-20, "BASIC INSPECTION : Special Repair Requirement"

(VQ35HR),

EC-576,

"BASIC INSPECTION : Special Repair Requirement"

(VK50VE).

2.

Perform initialization with CONSULT-III.
For initialization, 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

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. The registration is necessary.

• BCM
• ECM

B2192 ID DISCORD, IMMU-ECM

SEC-47

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

NO

>> GO TO 4.

4.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

.

>> INSPECTION END

SEC-48

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2193 CHAIN OF ECM-IMMU

B2193 CHAIN OF ECM-IMMU

Description

INFOID:0000000005249446

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

INFOID:0000000005249447

DTC DETECTION LOGIC

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

SEC-31, "BCM : DTC Logic"

.

• If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-33, "BCM : Diagnosis Procedure"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions.

-

Selector lever is in the P or N position.

-

Do not depress brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to

SEC-48, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249448

1.

REPLACE BCM

1.

Replace BCM. Refer to

BCS-83, "Removal and Installation"

.

2.

Perform initialization with CONSULT-III.
For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.

Does the engine start?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ECM

Replace ECM. Refer to

EC-20, "BASIC INSPECTION : Special Repair Requirement"

(VQ35HR),

EC-576,

"BASIC INSPECTION : Special Repair Requirement"

(VK50VE).

>> INSPECTION END

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

B2193

CHAIN OF ECM-
BCM

Inactive communication between ECM and BCM

• Harness or connectors

(The CAN communication line is
open or shorted)

• BCM
• ECM