Nissan Pathfinder (2012 year). Instruction — part 363
EXL-20
< SYSTEM DESCRIPTION >
PARKING, LICENSE PLATE AND TAIL LAMPS
Component Description
INFOID:0000000007355127
Part name
Description
BCM
• Receives lighting switch requests via BCM combination switch
reading function.
• Sends parking light request signal to the IPDM E/R.
IPDM E/R
Activates the tail lamp relay upon request of the BCM.
Combination switch (lighting and turn signal switch)
Outputs lighting requests to the BCM.
August 2012
2012 Pathfinder
COMBINATION SWITCH READING SYSTEM
EXL-21
< SYSTEM DESCRIPTION >
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COMBINATION SWITCH READING SYSTEM
System Diagram
INFOID:0000000007827516
System Description
INFOID:0000000007827517
OUTLINE
• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the
status of each switch.
• BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5) and reads
a maximum of 20 switch states.
COMBINATION SWITCH MATRIX
Combination switch circuit
Combination switch INPUT-OUTPUT system list
AWMIA1237GB
System
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
OUTPUT 1
—
FR WASHER
FR WIPER LOW
TURN LH
TURN RH
OUTPUT 2
FR WIPER HI
—
FR WIPER INT
PASSING
HEADLAMP 1
OUTPUT 3
INT VOLUME 1
RR WASHER
—
HEADLAMP 2
HI BEAM
AWMIA1238GB
August 2012
2012 Pathfinder
EXL-22
< SYSTEM DESCRIPTION >
COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING FUNCTION
Description
• BCM reads the status of the combination switch at 10 ms intervals normally.
NOTE:
BCM reads the status of the combination switch at 60 ms intervals when BCM is controlled at low power
consumption control mode.
• BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 1
→
2
→
3
→
4
→
5, and outputs
voltage waveform.
- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT
side if any (1 or more) switches are ON.
- It reads this change of the voltage as the status signal of the combination switch.
Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.
Example 1: When a switch (TAIL LAMP) is turned ON
OUTPUT 4
RR WIPER INT
INT VOLUME 3
AUTO LIGHT
—
TAIL LAMP
OUTPUT 5
INT VOLUME 2
RR WIPER ON
—
FR FOG
—
System
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
JPMIA0609GB
JMMIA0326GB
August 2012
2012 Pathfinder
COMBINATION SWITCH READING SYSTEM
EXL-23
< SYSTEM DESCRIPTION >
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• The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP switch is turned ON.
• BCM detects the combination switch status signal “5D” when the signal of OUTPUT 4 is input to INPUT 5.
• BCM judges that the TAIL LAMP switch is ON when the signal “5D” is detected.
Example 2: When some switches (TURN RH, TAIL LAMP) are turned ON
• The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the
TURN RH switch and TAIL LAMP switch are turned ON.
• BCM detects the combination switch status signal “5AD” when the signals of OUTPUT 1 and OUTPUT 4 are
input to INPUT 5.
• BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal “5AD” is detected.
WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)
BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.
AWMIA1239GB
AWMIA1240GB
August 2012
2012 Pathfinder
EXL-24
< SYSTEM DESCRIPTION >
COMBINATION SWITCH READING SYSTEM
Component Parts Location
INFOID:0000000007827518
Wiper intermittent
dial position
Intermittent
operation delay
interval
INT VOLUME switch ON/OFF status
INT VOLUME 1
INT VOLUME 2
INT VOLUME 3
1
Short
↑
↓
Long
ON
ON
ON
2
ON
ON
OFF
3
ON
OFF
OFF
4
OFF
OFF
OFF
5
OFF
OFF
ON
6
OFF
ON
ON
7
OFF
ON
OFF
1.
BCM M18, M19, M20 (view with low-
er instrument panel LH removed)
2.
Combination switch (lighting and
turn signal switch) M28
3.
Combination switch (wiper and
washer switch) M28
ALMIA0308ZZ
August 2012
2012 Pathfinder
TRAILER TOW
EXL-25
< SYSTEM DESCRIPTION >
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TRAILER TOW
System Diagram
INFOID:0000000007355131
System Description
INFOID:0000000007355132
TRAILER TAIL LAMP OPERATION
The trailer tail lamps are controlled by the trailer tow relay 1 located in the IPDM E/R. With the combination
switch (lighting and turn signal switch) in the 1st position, the BCM detects the LIGHTING SWITCH 1ST POSI-
TION ON. The BCM sends a parking light ON request via the CAN communication lines to the IPDM E/R. The
IPDM E/R then activates the tail lamp relay which activates the trailer tow relay 1 and sends power to the
trailer connector.
TRAILER TURN SIGNAL LAMP OPERATION
The trailer turn signal lamps are controlled by the BCM. When the turn signal switch is in the LH or RH position
with the ignition switch ON, the combination switch (lighting and turn signal switch) sends a signal to the BCM.
The BCM detects the TURN RH or TURN LH ON request. The BCM sends a control signal to the respective
trailer turn relay which sends power to the trailer connector.
TRAILER HAZARD LAMP OPERATION
The trailer hazard lamps are controlled by the BCM. When the hazard switch is pressed, the BCM detects the
the hazard ON request. The BCM then sends a control signal to both trailer turn relays which sends power to
the trailer connector.
TRAILER BRAKE LAMP OPERATION
The trailer brake lamps are controlled by the BCM. When the brake pedal is depressed, the combination meter
receives a stop lamp switch signal from the stop lamp switch. The combination meter then sends the brake
signal to the BCM via the CAN communication lines. The BCM then sends a control signal to both trailer turn
relays which sends power to the trailer connector.
ABLIA2788GB
August 2012
2012 Pathfinder
EXL-26
< SYSTEM DESCRIPTION >
TRAILER TOW
Component Parts Location
INFOID:0000000007355133
Component Description
INFOID:0000000007355134
1.
Stop lamp switch E38 (view with lower
instrument panel LH removed)
2.
Brake pedal
3.
BCM, M18, M19, M20 (view with lower
instrument panel LH removed)
4.
Trailer turn relay LH E163
5.
IPDM E/R E121, E122, E124
6.
Trailer turn relay RH E164
7.
Trailer tow relay 2 E140
8.
Trailer tow relay 1 E148
9.
Combination switch (lighting and turn
signal switch) M28
10. Combination meter M24
AWLIA1765GB
Part name
Description
BCM
• Receives lighting and turn signal requests from combination
switch (lighting and turn signal switch).
• Receives stop lamp signal requests from combination meter via
CAN communication.
• Sends lighting signal request to the IPDM E/R to control the tail
lamp relay via CAN communication.
• Sends turn/hazard/brake control signal to the trailer turn relays.
IPDM E/R
Activates the tail lamp relay upon request from the BCM via CAN
communication.
Combination meter
• Receives stop lamp switch signal from stop lamp switch.
• Sends stop lamp signal request to the BCM via CAN communi-
cation.
Combination switch (lighting and turn signal switch)
Outputs lighting and turn signal requests to the BCM.
August 2012
2012 Pathfinder
DIAGNOSIS SYSTEM (BCM)
EXL-27
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
INFOID:0000000007827519
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions.
Direct Diagnostic Mode
Description
Ecu Identification
The BCM part number is displayed.
Self Diagnostic Result
The BCM self diagnostic results are displayed.
Data Monitor
The BCM input/output data is displayed in real time.
Active Test
The BCM activates outputs to test components.
Work support
The settings for BCM functions can be changed.
Configuration
• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.
CAN Diag Support Mntr
The result of transmit/receive diagnosis of CAN communication is displayed.
System
Sub System
Direct Diagnostic Mode
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Co
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CA
N Diag
Su
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ort Mn
tr
Door lock
DOOR LOCK
×
×
×
Rear window defogger
REAR DEFOGGER
×
×
Warning chime
BUZZER
×
×
Interior room lamp timer
INT LAMP
×
×
×
Remote keyless entry system
MULTI REMOTE ENT
×
×
×
Exterior lamp
HEAD LAMP
×
×
×
Wiper and washer
WIPER
×
×
×
Turn signal and hazard warning lamps FLASHER
×
×
Air conditioner
AIR CONDITIONER
×
Intelligent Key system
INTELLIGENT KEY
×
Combination switch
COMB SW
×
BCM
BCM
×
×
×
×
×
Immobilizer
IMMU
×
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Back door open
TRUNK
×
×
Vehicle security system
THEFT ALM
×
×
×
RAP system
RETAINED PWR
×
×
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS
AIR PRESSURE MONITOR
×
×
×
×
Panic alarm system
PANIC ALARM
×
August 2012
2012 Pathfinder
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