Nissan Pathfinder (2008 year). Manual - part 550

B2191, P1615 DIFFERENCE OF KEY

SEC-33

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2191, P1615 DIFFERENCE OF KEY

Description

INFOID:0000000001689538

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:0000000001689539

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-33, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001689540

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-54, "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 

P1615

SEC-34

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2192, P1611 ID DISCORD, IMMU-ECM

B2192, P1611 ID DISCORD, IMMU-ECM

Description

INFOID:0000000001689541

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:0000000001689542

DTC DETECTION LOGIC

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

SEC-25, "DTC Logic"

.

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

SEC-26, "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-34, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001689543

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-54, "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 INTERMITENT INCIDENT

Refer to 

GI-51, "Intermittent Incident"

.

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

P1611

B2192, P1611 ID DISCORD, IMMU-ECM

SEC-35

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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>> INSPECTION END

SEC-36

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2193, P1612 CHAIN OF ECM-IMMU

B2193, P1612 CHAIN OF ECM-IMMU

Description

INFOID:0000000001689544

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:0000000001689545

DTC DETECTION LOGIC

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

SEC-25, "DTC Logic"

.

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

SEC-26, "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-36, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001689546

1.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-54, "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 BCM-
ECM

Inactive communication between ECM and BCM

• Harness or connectors

(The CAN communication line is 
open or short)

• BCM
• ECM

P1612

B2194 ID DISCORD IMMU-I-KEY

SEC-37

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2194 ID DISCORD IMMU-I-KEY

Description

INFOID:0000000001689547

BCM performs the ID verification with Intelligent Key unit that allows the engine to start. BCM starts the com-
munication with Intelligent Key unit if ignition switch is turned ON and starts the engine if the ID is OK. BCM
prevents the engine from starting if the ID is not registered.

DTC Logic

INFOID:0000000001689548

DTC DETECTION 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:0000000001689549

1.

PERFORM INITIALIZATION

1.

Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> GO TO 2

NO

>> ID was unregistered.

2.

REPLACE BCM

1.

Turn ignition switch OFF.

2.

Replace BCM. Refer to 

BCS-54, "Removal and Installation"

.

3.

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?

YES

>> BCM is malfunctioning.

NO

>> GO TO 3

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-51, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2194

DISCORD BCM-I-
KEY

The ID verification results between BCM and Intel-
ligent Key unit are NG. The registration is neces-
sary.

• BCM
• Intelligent Key unit

SEC-38

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2552 INTELLIGENT KEY

B2552 INTELLIGENT KEY

Description

INFOID:0000000001689550

Intelligent key unit performs engine start operation and steering lock control by crosschecking ID with the Intel-
ligent key.

DTC Logic

INFOID:0000000001689551

DTC DETECTION 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-38, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001689552

1.

REPLACE INTELLIGENT KEY UNIT

1.

Replace Intelligent Key unit.

2.

Perform initialization with CONSULT-III. Re-register all mechanical keys. Refer to “CONSULT-III Opera-
tion Manual”.

3.

Start the engine.

Does the engine start?

YES

>> INSPECTION END

NO

>> Perform “DTC confirmation procedure”. Refer to 

SEC-38, "DTC Logic"

.

Special Repair Requirement

INFOID:0000000001689553

1.

REQUIRED WORK WHEN REPLACING INTELLIGENT KEY UNIT

Initialize control unit. Refer to CONSULT-III Operation Manual.

>> Work end.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2552

INTELLIGENT KEY 
UNIT

Malfunction is detected inside Intelligent 
key unit.

Intelligent Key unit

B2590 ID DISCORD BCM-I-KEY

SEC-39

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2590 ID DISCORD BCM-I-KEY

Description

INFOID:0000000001689554

Intelligent Key unit performs the ID verification with BCM that allows the engine to start. BCM starts the engine
if the ID is OK and prevents the engine from starting if the ID is not registered.

DTC Logic

INFOID:0000000001689555

DTC DETECTION LOGIC

NOTE:
• If DTC B2590 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-25, "DTC Logic"

.

• If DTC B2590 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-26, "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-39, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001689556

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

>>

BCM is malfunctioning.

• Replace BCM. Refer to REMOVAL PROCEDURE.
• Perform initialization again

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2590

ID DISCORD BCM-I-
KEY

The ID verification results between BCM and Intel-
ligent Key unit are NG. The registration is neces-
sary.

• BCM
• Intelligent Key unit

SEC-40

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1610 LOCK MODE

P1610 LOCK MODE

Description

INFOID:0000000001689557

When the starting operation is carried more than five times consecutively under the following conditions, NATS
will shift to the mode which prevents the engine from being started.
• Unregistered mechanical key is used.
• BCM or ECM's malfunctioning.

DTC Logic

INFOID:0000000001689558

DTC DETECTION 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-40, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001689559

1.

CHECK ENGINE START FUNCTION

1.

Perform the check for DTC except DTC P1610.

2.

Use CONSULT-III to erase DTC after fixing.

3.

Check that engine can start with registered mechanical key.

Does the engine start?

YES

>> INSPECTION END

NO

>> GO TO 2

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-51, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1610

LOCK MODE

When the starting operation is carried out 
five or more times consecutively under the 
following conditions.
• Unregistered mechanical key
• BCM or ECM's malfunctioning.

—