Nissan Pathfinder (2009 year). Manual - part 589

SEC-134

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003938518

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart, refer to .

LAN-58, "CAN Communication Signal Chart"

DTC Logic

INFOID:0000000003938519

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003938520

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-5, "CAN Communication Control Circuit"

.

NO

>> Refer to 

GI-49, "Intermittent Incident"

.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more.

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Receiving (TCM)
• Receiving (IPDM E/R)
• Receiving (ECM)
• Receiving (METER/M&A)
• Receiving (MULTI AV)

2009 Pathfinder

U1010 CONTROL UNIT (CAN)

SEC-135

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000003938521

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart, refer to 

LAN-58, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000003938522

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003938523

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000003938524

1.

REQUIRED WORK WHEN REPLACING BCM

Initialize BCM. Refer to CONSULT-III Operation Manual.

>> Work End.

DTC

CONSULT-III display de-

scription

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT (CAN)

When detecting error during the initial diagnosis of CAN control-
ler of BCM.

BCM

2009 Pathfinder

SEC-136

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2190, P1614 NATS ANTENNA AMP.

B2190, P1614 NATS ANTENNA AMP.

Description

INFOID:0000000003938525

Performs ID verification through BCM and NATS antenna amplifier when ignition key is inserted and ignition
switch turned ON.
Prohibits the start of engine when an unregistered ID of ignition key is used.

DTC Logic

INFOID:0000000003938526

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Insert ignition key into the key cylinder.

2.

Turn ignition switch ON.

3.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Refer to 

SEC-136, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000003938527

1.

CHECK NATS ANTENNA AMP. INSTALLATION

Check NATS antenna amp. installation. Refer to 

SEC-194, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Reinstall NATS antenna amp. correctly.

2.

CHECK NVIS (NATS) IGNITION KEY ID CHIP

Start engine with another registered NATS ignition key.
Does the engine start?

YES

>> • Ignition key ID chip is malfunctioning.

• Replace the ignition key.
• Perform initialization with CONSULT-III.

For initialization, refer to “CONSULT-III Operation Manual”.

NO

>> GO TO 3

3.

CHECK POWER SUPPLY FOR NATS ANTENNA AMP.

1.

Turn ignition switch ON.

2.

Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2190

NATS ANTENNA 
AMP

• Inactive communication between NATS antenna 

amp. and BCM.

• Ignition key is malfunctioning.

• Harness or connectors

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

• Ignition  key
• NATS antenna amp.
• BCM

P1614

2009 Pathfinder

B2190, P1614 NATS ANTENNA AMP.

SEC-137

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[WITHOUT INTELLIGENT KEY SYSTEM]

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Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace fuse or harness.

4.

CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect NATS antenna amp. connector.

3.

Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> • Repair or replace harness.

NOTE:
If harness is OK, replace BCM, refer to 

BCS-59,

"Removal and Installation"

. Perform initialization with

CONSULT-III. For initialization, refer to “CONSULT-III
Operation Manual”.

5.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 1

1.

Connect NATS antenna amp. connector.

2.

Turn ignition switch ON.

3.

Check voltage between NATS antenna amp. connector M21 ter-
minal 2 and ground with analog tester.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> • Repair or replace harness.

NOTE:
If harness is OK, replace BCM, refer to 

BCS-59, "Removal and Installation"

. Perform initializa-

tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.

1 - Ground

: Battery voltage

LIIA1280E

3 - Ground

: Continuity should exist.

LIIA1283E

LIIA1281E

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

2

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

2009 Pathfinder

SEC-138

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2190, P1614 NATS ANTENNA AMP.

6.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 2

Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.

Is the inspection result normal?

YES

>> NATS antenna amp. is malfunctioning.

NO

>> • Repair or replace harness.

NOTE:
If harness is OK, replace BCM, refer to 

BCS-59, "Removal and Installation"

. Perform initializa-

tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.

LIIA1282E

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

4

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

2009 Pathfinder

B2191, P1615 DIFFERENCE OF KEY

SEC-139

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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B2191, P1615 DIFFERENCE OF KEY

Description

INFOID:0000000003938528

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:0000000003938529

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Insert mechanical key into the key cylinder.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Refer to 

SEC-139, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000003938530

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 

P1615

2009 Pathfinder

SEC-140

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2192, P1611 ID DISCORD, IMMU-ECM

B2192, P1611 ID DISCORD, IMMU-ECM

Description

INFOID:0000000003938531

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:0000000003938532

DTC DETECTION LOGIC

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

SEC-134, "DTC Logic"

.

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

SEC-135, "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-140, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000003938533

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 INTERMITENT INCIDENT

Refer to 

GI-49, "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

2009 Pathfinder

B2192, P1611 ID DISCORD, IMMU-ECM

SEC-141

< COMPONENT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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>> Inspection End.

2009 Pathfinder