Nissan Pathfinder (2011 year). Manual - part 101

U1000 CAN COMM CIRCUIT

BRC-73

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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U1000 CAN COMM CIRCUIT

Description

INFOID:0000000006245926

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, 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.

DTC Logic

INFOID:0000000006245927

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006245928

1.

CONNECTOR INSPECTION

1. Turn ignition switch OFF.

2. Disconnect the ABS actuator and electric unit (control unit) connector.

3. Check the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair

or replace the terminal.

4. Reconnect connector and perform self-diagnosis.
Is “CAN COMM CIRCUIT” displayed in self-diagnosis display items?

YES

>> Print out the self-diagnostic results, and refer to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

NO

>> Connector terminal is loose, damaged, open, or shorted.

DTC

Display item

Malfunction detected condition

Possible cause

U1000

CAN COMM CIRCUIT

When ABS actuator and electric unit (control unit) is not 
transmitting or receiving CAN communication signal for 2 
seconds or more.

• CAN communication line
• ABS actuator and electric unit 

(control unit)

2011 Pathfinder

BRC-74

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

VDC OFF SWITCH

VDC OFF SWITCH

Description

INFOID:0000000006245929

VDC OFF switch can deactivate (turn OFF) the VDC/TCS function by pressing the VDC OFF switch.

Component Function Check

INFOID:0000000006245930

1.

CHECK VDC OFF SWITCH OPERATION

Press and release the VDC OFF switch, then press and release the VDC OFF switch again and check that the

VDC OFF indicator lamp in the combination meter turns ON/OFF correctly.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

BRC-74, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006245931

Regarding Wiring Diagram information, refer to 

BRC-88, "Wiring Diagram - With VQ40DE"

.

1.

CHECK VDC OFF SWITCH

Perform the VDC OFF switch component inspection. Refer to 

BRC-75, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Replace VDC OFF switch.

2.

CHECK VDC OFF SWITCH HARNESS

1. Disconnect ABS actuator and electric unit (control unit) connec-

tor.

2. Check continuity between ABS actuator and electric unit (control

unit) connector E125 (A) terminal 6 and VDC OFF switch con-

nector M154 (B) terminal 1.

3. Check continuity between ABS actuator and electric unit (control

unit) connector E125 (A) terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK VDC OFF SWITCH GROUND

Condition

VDC OFF indicator lamp illumination status

VDC OFF switch: pressed and released

ON

VDC OFF switch: pressed and released

OFF

ABS actuator and electric unit 

(control unit)

VDC OFF switch

Continuity

Connector

Terminal

Connector

Terminal

E125 (A)

6

M154 (B)

1

Yes

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E125 (A)

6

Ground

No

AWFIA0682ZZ

2011 Pathfinder

VDC OFF SWITCH

BRC-75

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Check continuity between VDC OFF switch connector M154 and

ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

4.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-25, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

NO

>> Replace combination meter. Refer to 

MWI-88, "Removal and Installation"

.

Component Inspection

INFOID:0000000006245932

1.

CHECK VDC OFF SWITCH

1. Turn ignition switch OFF.

2. Disconnect VDC OFF switch connector.

3. Check continuity between VDC OFF switch terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace VDC OFF switch.

Special Repair Requirement

INFOID:0000000006689867

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

VDC OFF switch

—

Continuity

Connector

Terminal

M154

2

Ground

Yes

AWFIA0031ZZ

VDC OFF switch terminals

Condition

Continuity

1 

−

 2

When VDC OFF switch is pressed.

Yes

When VDC OFF switch is released.

No

AWFIA0446ZZ

2011 Pathfinder

BRC-76

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

ABS WARNING LAMP

ABS WARNING LAMP

Description

INFOID:0000000006245934

×

: ON –: OFF

Component Function Check

INFOID:0000000006245935

1.

CHECK ABS WARNING LAMP OPERATION

Check that the lamp illuminates for approximately 2 seconds after the ignition switch is turned ON.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

BRC-76, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006245936

1.

CHECK SELF-DIAGNOSIS

Perform ABS actuator and electric unit (control unit) self-diagnosis. Refer to 

BRC-29, "CONSULT-III Function

(ABS)"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Check items displayed by self-diagnosis.

2.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-25, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

NO

>> Replace combination meter. Refer to 

MWI-88, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000006689868

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

Condition

ABS warning lamp

Ignition switch OFF

–

For 2 seconds after turning ON ignition switch

×

2 seconds later after turning ON ignition switch

–

ABS function is malfunctioning.

×

EBD function is malfunctioning.

×

2011 Pathfinder

BRAKE WARNING LAMP

BRC-77

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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BRAKE WARNING LAMP

Description

INFOID:0000000006245938

×

: ON –: OFF

NOTE:

• 1: Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation

(when brake fluid is insufficient).

• 2: After starting engine, brake warning lamp is turned off.

Component Function Check

INFOID:0000000006245939

1.

BRAKE WARNING LAMP OPERATION CHECK

Check that the lamp illuminates after the ignition switch is turned ON, and turns OFF after the engine is

started.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

BRC-77, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006245940

1.

CHECK SELF-DIAGNOSIS

Perform ABS actuator and electric unit (control unit) self-diagnosis. Refer to 

BRC-29, "CONSULT-III Function

(ABS)"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Check items displayed by self-diagnosis.

2.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-25, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

NO

>> Replace combination meter. Refer to 

MWI-88, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000006689869

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

Condition

Brake warning lamp (Note 1)

Ignition switch OFF

–

Ignition switch ON

×

 (Note 2)

EBD function is malfunctioning.

×

2011 Pathfinder

BRC-78

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

VDC OFF INDICATOR LAMP

VDC OFF INDICATOR LAMP

Description

INFOID:0000000006245942

×

: ON –: OFF

Component Function Check

INFOID:0000000006245943

1.

VDC OFF INDICATOR LAMP OPERATION CHECK 1

Check that the lamp illuminates for approximately 2 seconds after the ignition switch is turned ON.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Go to diagnosis procedure. Refer to 

BRC-78, "Diagnosis Procedure"

.

2.

VDC OFF INDICATOR LAMP OPERATION CHECK 2

Check that the VDC OFF indicator lamp in the combination meter turns ON/OFF correctly when operating the

VDC OFF switch.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check VDC OFF switch. Refer to 

BRC-74, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006245944

1.

CHECK VDC OFF SWITCH

Check that the VDC OFF indicator lamp in the combination meter turns ON/OFF correctly when operating the

VDC OFF switch.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Check VDC OFF switch. Refer to 

BRC-74, "Diagnosis Procedure"

.

2.

CHECK SELF-DIAGNOSIS

Perform ABS actuator and electric unit (control unit) self-diagnosis. Refer to 

BRC-29, "CONSULT-III Function

(ABS)"

.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Check items displayed by self-diagnosis.

3.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-25, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

NO

>> Replace combination meter. Refer to 

MWI-88, "Removal and Installation"

.

Condition

VDC OFF indicator lamp

Ignition switch OFF

–

For 2 seconds after turning ON ignition switch

×

2 seconds later after turning ON ignition switch

–

VDC OFF switch turned ON. (VDC function is OFF.)

×

VDC/TCS function is malfunctioning.

×

ABS function is malfunctioning.

×

EBD function is malfunctioning.

×

2011 Pathfinder

VDC OFF INDICATOR LAMP

BRC-79

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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Special Repair Requirement

INFOID:0000000006689870

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

2011 Pathfinder

BRC-80

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

SLIP INDICATOR LAMP

SLIP INDICATOR LAMP

Description

INFOID:0000000006245946

×

: ON –: OFF

Component Function Check

INFOID:0000000006245947

1.

CHECK SLIP INDICATOR LAMP OPERATION

Check that the lamp illuminates for approximately 2 seconds after the ignition switch is turned ON.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

BRC-80, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006245948

1.

CHECK SELF-DIAGNOSIS

Perform ABS actuator and electric unit (control unit) self-diagnosis. Refer to 

BRC-29, "CONSULT-III Function

(ABS)"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Check items displayed by self-diagnosis.

2.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-25, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

NO

>> Replace combination meter. Refer to 

MWI-88, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000006689871

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

Condition

SLIP indicator lamp

Ignition switch OFF

–

For 2 seconds after turning ON ignition switch

×

2 seconds later after turning ON ignition switch

–

VDC/TCS function is malfunctioning.

×

ABS function is malfunctioning.

×

EBD function is malfunctioning.

×

2011 Pathfinder