Nissan Pathfinder (2009 year). Manual

BCS

DIAGNOSIS SYSTEM (BCM)

BCS-29

< FUNCTION DIAGNOSIS >

AIR PRESSURE MONITOR

AIR PRESSURE MONITOR : Diagnosis Description

INFOID:0000000003935274

DESCRIPTION

During driving, the TPMS receives the signal transmitted from the transmitter installed in each wheel, when
the tire pressure becomes low. The control unit (BCM) of this system has pressure judgment and trouble diag-
nosis functions.
When the TPMS detects low inflation pressure or another unusual symptom, the warning lamps in the combi-
nation meter comes on.

SELF DIAGNOSTIC PROCEDURE (WITH CONSULT-III)

With CONSULT-III

• Touch “SELF-DIAG RESULTS” display to show malfunction experienced since the last erasing operation.

Refer to

BCS-54, "DTC Index"

SELF DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-III)

Without CONSULT-III

To start the self-diagnostic results mode, ground terminal of the tire pressure warning check connector. The
malfunction location is indicated by the warning lamp flashing.

NOTE:
When the low tire warning lamp flashes 5 Hz and continues repeating it, the system is normal.

Test Item

Operation

Description

OIL PRESSURE SW

OFF

BCM transmits the oil pressure switch signal to the combination meter via CAN communica-
tion, which operates the oil pressure gauge in the combination meter.

SEIA0745E

Flickering

pattern

Items

Diagnostic items detected when···

Check item

Tire pressure value (Front LH)

Front LH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.

–

Tire pressure value (Front RH)

Front RH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.

Tire pressure value (Rear RH)

Rear RH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.

Tire pressure value (Rear LH)

Rear LH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.

Transmitter no data (Front LH)

Data from front LH transmitter can not be received.

WT-34

Transmitter no data (Front RH)

Data from front RH transmitter can not be received.

Transmitter no data (Rear RH)

Data from Rear RH transmitter can not be received.

Transmitter no data (Rear LH)

Data from Rear LH transmitter can not be received.

2009 Pathfinder

BCS-30

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

ERASE SELF-DIAGNOSIS

With CONSULT-III

Perform applicable inspection of malfunctioning item and then repair or replace.

Turn ignition switch “ON” and select “SELF-DIAG RESULTS” mode for “AIR PRESSURE MONITOR” with
CONSULTIII.

Touch “ERASE” on CONSULT-III screen to erase memory.

Without CONSULT-III

• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is

stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned “ON” and“OFF”.

• However, this information is erased by turning ignition switch “OFF” after performing self-diagnostic or by

erasing the memory using the CONSULT-III.

AIR PRESSURE MONITOR : CONSULT-III Function

INFOID:0000000003935275

WORK SUPPORT MODE

Transmitter checksum error
(Front LH)

Checksum data from front LH transmitter is malfunctioning.

WT-34

Transmitter checksum error
(Front RH)

Checksum data from front RH transmitter is malfunctioning.

Transmitter checksum error
(Rear RH)

Checksum data from rear RH transmitter is malfunctioning.

Transmitter checksum error
(Rear LH)

Checksum data from rear RH transmitter is malfunctioning.

Transmitter pressure data error
(Front LH)

Air pressure data from front LH transmitter is malfunction.

WT-34

Transmitter pressure data error
(Front RH)

Air pressure data from front RH transmitter is malfunction.

Transmitter pressure data error
(Rear RH)

Air pressure data from rear RH transmitter is malfunction.

Transmitter pressure data error
(Rear LH)

Air pressure data from rear LH transmitter is malfunction.

Transmitter function code error
(Front LH)

Function code data from front LH transmitter is malfunction.

WT-34

Transmitter function code error
(Front RH)

Function code data from front RH transmitter is malfunction.

Transmitter function code error
(Rear RH)

Function code data from rear RH transmitter is malfunction.

Transmitter function code error
(Rear LH)

Function code data from rear LH transmitter is malfunction.

Transmitter battery voltage low
(Front LH)

Battery voltage of front LH transmitter drops.

WT-34

Transmitter battery voltage low
(Front RH)

Battery voltage of front RH transmitter drops.

Transmitter battery voltage low
(Rear RH)

Battery voltage of rear RH transmitter drops.

Transmitter battery voltage low
(Rear LH)

Battery voltage of rear LH transmitter drops.

Vehicle speed signal error

Speed signal is not detected.

WT-34

No flicker-

ing

Tire pressure warning check
switch

Tire pressure warning switch circuit is open.

–

Flickering

pattern

Items

Diagnostic items detected when···

Check item

2009 Pathfinder

BCS

DIAGNOSIS SYSTEM (BCM)

BCS-31

< FUNCTION DIAGNOSIS >

ID Read

The registered ID number is displayed.

ID Regist

Refer to

WT-6, "ID Registration Procedure"

SELF-DIAG RESULTS MODE

Operation Procedure

Refer to

BCS-54, "DTC Index"

DATA MONITOR MODE

Screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-III performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.

Display item list

ACTIVE TEST MODE

NOTE:
Before performing the self-diagnosis, be sure to register the ID, or else the actual malfunction may be different
from that displayed on CONSULT-III.

TEST ITEM LIST

THEFT ALM

THEFT ALM : CONSULT-III Function (BCM - THEFT ALM)

INFOID:0000000003935276

WORK SUPPORT

Monitor

Condition

Specification

VEHICLE SPEED

Drive vehicle

Vehicle speed (km/h or MPH)

AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

• Drive vehicle for a few minutes.

• Ignition switch ON and activation tool is trans-

mitting activation signals.

Tire pressure (kPa, kg/cm

or Psi)

ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1

Ignition switch ON

Registration ID: Green
No registration: Red

WARNING LAMP

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

BUZZER

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

Test item

Content

WARNING LAMP

This test is able to check to make sure that the warning lamp turns on.

ID REGIST WARNING

This test is able to check to make sure that the buzzer sounds or the warning lamp turns on.

FLAT TIRE WARNING

This test is able to check to make sure that the flat tire warning turns on.

HORN

This test is able to check to make sure that the horn sounds.

FLASHER

This test is able to check to make sure that each turn signal lamp turns on.

RUN FLAT TIRE W/L

This item is displayed but not monitored.

Test Item

Description

SECURITY ALARM SET

This mode is able to confirm and change security alarm ON-OFF setting.

THEFT ALM TRG

The switch which triggered vehicle security alarm is recorded. This mode is able to confirm and
erase the record of vehicle security alarm. The trigger data can be erased by touching “CLEAR” on
CONSULT-III screen.

2009 Pathfinder

BCS-32

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

DATA MONITOR

1: With Intelligent Key

2: With remote keyless entry system

ACTIVE TEST

Monitor Item

[Unit]

Description

IGN ON SW [ON/OFF]

Indicates ignition switch (ON) status judged from IGN signal (ignition power supply)

ACC ON SW [ON/OFF]

Indicates ignition switch (ACC) status judged from ACC signal (accessory power supply)

KEYLESS PSD R [ON/OFF]

NOTE:
This is displayed even when it is not equipped

KEYLESS PSD L [ON/OFF]

NOTE:
This is displayed even when it is not equipped

KEYLESS PBD [ON/OFF]

NOTE:
This is displayed even when it is not equipped

I-KEY LOCK

[ON/OFF]

Inicates lock signal status recieved from Intelligent Key unit by CAN communication

I-KEY UNLOCK

[ON/OFF]

Inicates unlock signal status recieved from Intelligent Key unit by CAN communication

I-KEY TRUNK

[ON/OFF]

Indicates condition of back door opener switch

KEYLESS LOCK

[ON/OFF]

Indicates lock signal status recieved from remote keyless entry reciever (integrated in the BCM)

KEYLESS UNLOCK

[ON/OFF]

Indicates unlock signal status recieved from remote keyless entry reciever (integrated in the BCM)

TRNK OPENER SW [ON/OFF]

Indicates switch status of back door opener switch

TRUNK CYL SW [ON/OFF]

NOTE:
This is displayed even when it is not equipped

TRNK OPN MNTR [ON/OFF]

Indicates switch status of back door latch

DOOR SW-DR [ON/OFF]

Indicates switch status input from front door switch LH

DOOR SW-AS [ON/OFF]

Indicates switch status input from front door switch RH

DOOR SW-RR [ON/OFF]

Indicates switch status input from rear door switch RH

DOOR SW-RL [ON/OFF]

Indicates switch status input from rear door switch LH

BACK DOOR SW [ON/OFF]

Indicates switch status input from back door switch

KEY CYL LK-SW [ON/OFF]

Indicates lock switch status from door key cylinder switch

KEY CYL UN-SW [ON/OFF]

Indicates unlock switch status from door key cylinder switch

CDL LOCK SW [ON/OFF]

Indicates lock switch status from door lock and unlock switch

CDL UNLOCK SW [ON/OFF]

Indicates unlock switch status from door lock and unlock switch

HOOD SW [ON/OFF]

NOTE:
This is displayed even when it is not equipped

Test Item

Description

THEFT IND

This test is able to check security indicator lamp operation. The lamp will be turned on when “ON”
on CONSULT-III screen is touched.

VEHICLE SECURITY HORN

This test is able to check vehicle security horn operation. The horns will be activated for 0.5 sec-
onds after “ON” on CONSULT-III screen is touched.

HEADLAMP(HI)

This test is able to check vehicle security lamp operation. The headlamps will be activated for 0.5
seconds after “ON” on CONSULT-III screen is touched.

2009 Pathfinder

BCS

U1000 CAN COMM CIRCUIT

BCS-33

< COMPONENT DIAGNOSIS >

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003935277

Refer to

LAN-58, "CAN Communication Signal Chart"

DTC Logic

INFOID:0000000003935278

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003935279

PERFORM SELF DIAGNOSTIC

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

Check “Self Diagnostic Result” of BCM.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to

LAN-14, "Trouble Diagnosis Flow Chart"

>> 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.

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)

2009 Pathfinder

BCS-34

< COMPONENT DIAGNOSIS >

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000003935280

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003935281

REPLACE BCM

When “DTC:U1010” is detected, replace BCM.

>> Replace BCM. Refer to

BCS-59, "Removal and Installation"

Special Repair Requirement

INFOID:0000000003935282

ADDITIONAL SERVICE WHEN REPLACING BCM

>> Refer to

BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair

Requirement"

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

BCS

POWER SUPPLY AND GROUND CIRCUIT

BCS-35

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000003935283

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.

>> GO TO 2

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.

Disconnect BCM.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

>> Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

>> Repair or replace harness.

Terminal No.

Signal name

Fuses and fusible link No.

Battery power supply

18 (10A)

G (50A)

Ignition ACC or ON

4 (10A)

Ignition ON or START

1 (10A)

Connector

Terminals

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

Ground

ACC

power

supply

Ignition

switch

ACC or

Battery voltage

Ground

Ignition

power

supply

Ignition

switch ON

or START

Battery voltage

M20

Ground

Battery

power

supply

Ignition

switch

OFF

Battery voltage

Ground

Battery

power

supply

Ignition

switch

OFF

Battery voltage

LIIA2415E

BCM

Ground

Continuity

Connector

Terminal

M20

Yes

LIIA0915E

2009 Pathfinder

BCS-36

< COMPONENT DIAGNOSIS >

COMBINATION SWITCH INPUT CIRCUIT

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure

INFOID:0000000003935284

CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

Turn ignition switch OFF.

Disconnect BCM and combination switch.

Check continuity between BCM harness connector and combi-
nation switch harness connector.

Does continuity exist?

YES

>> GO TO 2

>> Repair or replace harness.

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.

>> GO TO 3

CHECK BCM OUTPUT VOLTAGE

Connect BCM.

Turn ignition switch ON.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

System

BCM

Combination switch

Continuity

Connector

Terminal

Connector

Terminal

INPUT 1

M18

(A)

M28

(B)

Yes

INPUT 2

INPUT 3

INPUT 4

INPUT 5

ALMIA0275ZZ

System

BCM

Ground

Continuity

Connector

Terminal

INPUT 1

M18

INPUT 2

INPUT 3

INPUT 4

INPUT 5

ALMIA0276ZZ

System

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

INPUT 1

M18

Refer to

BCS-

41, "Refer-

ence Value"

INPUT 2

INPUT 3

INPUT 4

INPUT 5

ALMIA0277ZZ

2009 Pathfinder

Nissan Pathfinder (2009 year). Manual - part 86