Nissan Pathfinder (2009 year). Manual — part 86
BCS
DIAGNOSIS SYSTEM (BCM)
BCS-29
< FUNCTION DIAGNOSIS >
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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.
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
OFF
ON
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
15
Tire pressure value (Front LH)
Front LH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.
–
16
Tire pressure value (Front RH)
Front RH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.
17
Tire pressure value (Rear RH)
Rear RH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.
18
Tire pressure value (Rear LH)
Rear LH tire pressure drops to 181 kPa (1.8 kg/cm, 25.25 psi) or less.
21
Transmitter no data (Front LH)
Data from front LH transmitter can not be received.
22
Transmitter no data (Front RH)
Data from front RH transmitter can not be received.
23
Transmitter no data (Rear RH)
Data from Rear RH transmitter can not be received.
24
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
1.
Perform applicable inspection of malfunctioning item and then repair or replace.
2.
Turn ignition switch “ON” and select “SELF-DIAG RESULTS” mode for “AIR PRESSURE MONITOR” with
CONSULTIII.
3.
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
31
Transmitter checksum error
(Front LH)
Checksum data from front LH transmitter is malfunctioning.
32
Transmitter checksum error
(Front RH)
Checksum data from front RH transmitter is malfunctioning.
33
Transmitter checksum error
(Rear RH)
Checksum data from rear RH transmitter is malfunctioning.
34
Transmitter checksum error
(Rear LH)
Checksum data from rear RH transmitter is malfunctioning.
35
Transmitter pressure data error
(Front LH)
Air pressure data from front LH transmitter is malfunction.
36
Transmitter pressure data error
(Front RH)
Air pressure data from front RH transmitter is malfunction.
37
Transmitter pressure data error
(Rear RH)
Air pressure data from rear RH transmitter is malfunction.
38
Transmitter pressure data error
(Rear LH)
Air pressure data from rear LH transmitter is malfunction.
41
Transmitter function code error
(Front LH)
Function code data from front LH transmitter is malfunction.
42
Transmitter function code error
(Front RH)
Function code data from front RH transmitter is malfunction.
43
Transmitter function code error
(Rear RH)
Function code data from rear RH transmitter is malfunction.
44
Transmitter function code error
(Rear LH)
Function code data from rear LH transmitter is malfunction.
45
Transmitter battery voltage low
(Front LH)
Battery voltage of front LH transmitter drops.
46
Transmitter battery voltage low
(Front RH)
Battery voltage of front RH transmitter drops.
47
Transmitter battery voltage low
(Rear RH)
Battery voltage of rear RH transmitter drops.
48
Transmitter battery voltage low
(Rear LH)
Battery voltage of rear LH transmitter drops.
52
Vehicle speed signal error
Speed signal is not detected.
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 >
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ID Read
The registered ID number is displayed.
ID Regist
WT-6, "ID Registration Procedure"
.
SELF-DIAG RESULTS MODE
Operation Procedure
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.
or
• Ignition switch ON and activation tool is trans-
mitting activation signals.
Tire pressure (kPa, kg/cm
2
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
1
[ON/OFF]
Inicates lock signal status recieved from Intelligent Key unit by CAN communication
I-KEY UNLOCK
1
[ON/OFF]
Inicates unlock signal status recieved from Intelligent Key unit by CAN communication
I-KEY TRUNK
1
[ON/OFF]
Indicates condition of back door opener switch
KEYLESS LOCK
2
[ON/OFF]
Indicates lock signal status recieved from remote keyless entry reciever (integrated in the BCM)
KEYLESS UNLOCK
2
[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 >
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000003935277
LAN-58, "CAN Communication Signal Chart"
DTC Logic
INFOID:0000000003935278
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000003935279
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-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
1.
REPLACE BCM
When “DTC:U1010” is detected, replace BCM.
>> Replace BCM. Refer to
BCS-59, "Removal and Installation"
Special Repair Requirement
INFOID:0000000003935282
1.
ADDITIONAL SERVICE WHEN REPLACING BCM
>> Refer to
BCS-3, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair
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 >
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POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000003935283
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
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> Inspection End.
NO
>> Repair or replace harness.
Terminal No.
Signal name
Fuses and fusible link No.
57
Battery power supply
18 (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
BCM
Ground
Continuity
Connector
Terminal
M20
67
Yes
LIIA0915E
2009 Pathfinder
BCS-36
< COMPONENT DIAGNOSIS >
COMBINATION SWITCH INPUT CIRCUIT
COMBINATION SWITCH INPUT CIRCUIT
Diagnosis Procedure
INFOID:0000000003935284
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 BCM OUTPUT VOLTAGE
1.
Connect BCM.
2.
Turn ignition switch ON.
3.
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)
6
M28
(B)
6
Yes
INPUT 2
5
7
INPUT 3
4
10
INPUT 4
3
9
INPUT 5
2
8
ALMIA0275ZZ
System
BCM
Ground
Continuity
Connector
Terminal
INPUT 1
M18
6
No
INPUT 2
5
INPUT 3
4
INPUT 4
3
INPUT 5
2
ALMIA0276ZZ
System
Terminals
Voltage
(Approx.)
(+)
(
−
)
BCM
Ground
Connector
Terminal
INPUT 1
M18
6
Refer to
.
INPUT 2
5
INPUT 3
4
INPUT 4
3
INPUT 5
2
ALMIA0277ZZ
2009 Pathfinder
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