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
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
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
.
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
.
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
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
.
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
.
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
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
.
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
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
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