Nissan Pathfinder (2012 year). Manual - part 81

BCS-28

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (BCM)

ACTIVE TEST

WORK SUPPORT

PANIC ALARM
PANIC ALARM : CONSULT Function (BCM - PANIC ALARM)

INFOID:0000000007354932

ACTIVE TEST

ID REGST FL1

Ignition switch ON.

Registration ID: Green
No registration: Red

ID REGST FR1

ID REGST RR1

ID REGST RL1

WARNING LAMP

Ignition switch ON.

Low tire pressure warning lamp on: ON.
Low tire pressure warning lamp off: OFF.

BUZZER

Ignition switch ON.

Buzzer in combination meter on: ON.
Buzzer in combination meter off: OFF.

Monitor Item

Condition

Specification

Test Item

Description

WARNING LAMP

This test is able to check tire pressure warning lamp operation [Off/On].

ID REGIST WARNING

This test is able to check ID regist warning chime operation [Off/On].

FLAT TIRE WARNING

This test is able to check flat tire warning chime operation [Off/On].

HORN

This test is able to check horn operation [On].

FLASHER

This test is able to check turn signal lamp operation [Off/LH/RH].

Support Item

Description

ID REGIST

Refer to 

WT-6, "ID Registration Procedure"

.

ID READ

The registered ID number is displayed.

Test Item

Description

HEAD LAMP (HI)

This test is able to check head lamp HI operation [On].

PANIC ALARM

This test is able to check panic alarm operation [On].

August 2012

2012 Pathfinder

BCS

U1000 CAN COMM CIRCUIT

BCS-29

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000007354933

Refer to 

LAN-53, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000007354934

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000007354935

1.

 PERFORM SELF DIAGNOSTIC

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

2. Check “Self Diagnostic Result” of BCM.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-14, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-37, "Intermittent Incident"

.

DTC

CONSULT display de-

scription

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

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

Any item (or items) of the following listed below is 
malfunctioning in CAN communication system.
• Transmission
• Receiving (ECM)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (MULTI AV)
• Receiving (IPDM E/R)
• Receiving (I-KEY)

August 2012

2012 Pathfinder

BCS-30

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000007354936

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

21 (10A)

70

G (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

1 (10A)

Connector

Terminals 

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC 

power 

supply

Ignition 

switch 

ACC or 

ON

Battery voltage

38

Ground

Ignition 

power 

supply

Ignition 

switch ON 

or START

Battery voltage

M20

57

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

70

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

LIIA2415E

August 2012

2012 Pathfinder

BCS

POWER SUPPLY AND GROUND CIRCUIT

BCS-31

< DTC/CIRCUIT DIAGNOSIS >

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Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

LIIA0915E

August 2012

2012 Pathfinder

BCS-32

< DTC/CIRCUIT DIAGNOSIS >

COMBINATION SWITCH INPUT CIRCUIT

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000007354937

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect BCM and combination switch.

3. Check continuity between BCM harness connector and combi-

nation switch harness connector.

Does continuity exist?

YES

>> GO TO 2

NO

>> Repair or replace harness.

2.

 CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair or replace harness.

NO

>> GO TO 3

3.

 CHECK COMBINATION SWITCH

Check combination switch. Refer to 

BCS-50, "Symptom Table"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-53, "Removal and Installation"

.

NO

>> Replace combination switch (applicable parts). Refer to 

EXL-149, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000007354938

1.

 ADDITIONAL SERVICE WHEN REPLACING BCM

>> Refer to 

BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work

Procedure"

.

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

INPUT 1

M18

(A)

36

M28

(B)

1

Yes

INPUT 2

35

2

INPUT 3

34

3

INPUT 4

33

4

INPUT 5

32

5

ALMIA0278ZZ

System

BCM

Ground

Continuity

Connector

Terminal

INPUT 1

M18

36

No

INPUT 2

35

INPUT 3

34

INPUT 4

33

INPUT 5

32

ALMIA0279ZZ

August 2012

2012 Pathfinder

BCS

COMBINATION SWITCH OUTPUT CIRCUIT

BCS-33

< DTC/CIRCUIT DIAGNOSIS >

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COMBINATION SWITCH OUTPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000007354939

Regarding Wiring Diagram information, refer to 

BCS-46, "Wiring Diagram"

.

1.

 CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect BCM and combination switch.

3. Check continuity between BCM harness connector and combi-

nation switch harness connector.

Does continuity exist?

YES

>> GO TO 2

NO

>> Repair or replace harness.

2.

 CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair or replace harness.

NO

>> GO TO 3

3.

 CHECK BCM INPUT VOLTAGE

1. Connect BCM.

2. Turn ignition switch ON.

3. Check voltage between BCM harness connector and ground.

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

OUTPUT 1

M18

(A)

6

M28

(B)

6

Yes

OUTPUT 2

5

7

OUTPUT 3

4

10

OUTPUT 4

3

9

OUTPUT 5

2

8

ALMIA0275ZZ

System

BCM

Ground

Continuity

Connector

Terminal

OUTPUT 1

M18

6

No

OUTPUT 2

5

OUTPUT 3

4

OUTPUT 4

3

OUTPUT 5

2

ALMIA0276ZZ

ALMIA0277ZZ

August 2012

2012 Pathfinder

BCS-34

< DTC/CIRCUIT DIAGNOSIS >

COMBINATION SWITCH OUTPUT CIRCUIT

Is the measurement value normal?

YES

>> GO TO 4

NO

>> Replace BCM. Refer to 

BCS-53, "Removal and Installation"

.

4.

 CHECK COMBINATION SWITCH

Check combination switch. Refer to 

BCS-50, "Symptom Table"

.

Is the check result normal?

YES

>> Replace BCM. Refer to 

BCS-53, "Removal and Installation"

.

NO

>> Replace the combination switch (applicable parts). Refer to 

EXL-149, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000007354940

1.

 ADDITIONAL SERVICE WHEN REPLACING BCM

>> Refer to 

BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work

Procedure"

.

System

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

INPUT 1

M18

6

Refer to 

BCS-

35, "Refer-

ence Value"

.

INPUT 2

5

INPUT 3

4

INPUT 4

3

INPUT 5

2

August 2012

2012 Pathfinder

BCS

BCM (BODY CONTROL MODULE)

BCS-35

< ECU DIAGNOSIS INFORMATION >

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ECU DIAGNOSIS INFORMATION

BCM (BODY CONTROL MODULE)

Reference Value

INFOID:0000000007354943

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II

User Guide for additional information.

• Activate and display TPMS transmitter IDs

• Display tire pressure reported by the TPMS transmitter

• Read TPMS DTCs

• Register TPMS transmitter IDs

VALUES ON THE DIAGNOSIS TOOL

Monitor Item

Condition

Value/Status

ACC ON SW

Ignition switch OFF or ON

Off

Ignition switch ACC

On

AIR COND SW

A/C switch OFF

Off

A/C switch ON

On

AIR PRESS FL

Front left tire air pressure value

kPa, kg/cm

2

, psi

AIR PRESS FR

Front right tire air pressure value

kPa, kg/cm

2

, psi

AIR PRESS RL

Rear left tire air pressure value

kPa, kg/cm

2

, psi

AIR PRESS RR

Rear right tire air pressure value

kPa, kg/cm

2

, psi

AUTO LIGHT SW

Lighting switch OFF

Off

Lighting switch AUTO

On

BACK DOOR SW

Back door closed

Off

Back door opened

On

BRAKE SW

Brake pedal released

Off

Brake pedal applied

On

BUCKLE SW

Seat belt buckle unfastened

Off

Seat belt buckle fastened

On

BUZZER

Buzzer in combination meter OFF

Off

Buzzer in combination meter ON

On

CDL LOCK SW

Door lock/unlock switch does not operate

Off

Press door lock/unlock switch to the LOCK side

On

CDL UNLOCK SW

Door lock/unlock switch does not operate

Off

Press door lock/unlock switch to the UNLOCK side

On

DOOR SW-AS

Front door RH closed

Off

Front door RH opened

On

DOOR SW-DR

Front door LH closed

Off

Front door LH opened

On

DOOR SW-RL

Rear door LH closed

Off

Rear door LH opened

On

DOOR SW-RR

Rear door RH closed

Off

Rear door RH opened

On

FAN ON SIG

Blower motor fan switch OFF

Off

Blower motor fan switch ON

On

August 2012

2012 Pathfinder