Nissan Pathfinder (2012 year). Manual — part 204
4WD SYSTEM
DLN-197
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
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4LO Indicator Lamp
• Displays 4LO while engine is running. 4LO indicator lamp flashes if transfer gear does not shift completely
into 4H
⇔
4LO. In this condition, the transfer case may be in neutral and the A/T parking mechanism may not
operate.
• Turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1 sec-
ond after the engine starts if system is normal.
4WD WARNING LAMP
Turns on or flashes when there is a malfunction in 4WD system.
Also turns on when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1
second after the engine starts if system is normal.
4WD Warning Lamp Indication
ATP WARNING LAMP
When the A/T selector lever is in “P” position, the vehicle may move if the transfer case is in neutral. ATP
warning lamp is turned on to indicate this condition to the driver.
Condition
4WD warning lamp
System normal
OFF
Lamp check
Turns ON when ignition switch is turned ON.
Turns OFF after engine start.
4WD system malfunction
ON
During self-diagnosis
Flashes malfunction mode.
Large difference in diameter of front/
rear tires
Flashes slow (1 flash / 2 seconds)
(Continues to flash until the ignition switch is turned OFF)
August 2012
2012 Pathfinder
DLN-198
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
4WD SYSTEM
Component Parts Location
INFOID:0000000007357486
1.
Fuse and relay box
A: Transfer shut off relay 1 E156
B: Transfer shift high relay E44
C: Transfer shift low relay E43
D: Transfer shut off relay 2 E157
2.
A: ATP switch F71
B: 4 LO switch F74
(View with front propeller shaft re-
moved.)
3.
Wait detection switch F73
WDIA0337E
August 2012
2012 Pathfinder
4WD SYSTEM
DLN-199
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
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CAN Communication
INFOID:0000000007357487
Cross-Sectional View
INFOID:0000000007357488
4.
Transfer control device F72
5.
Transfer control unit M165, M166
(View with lower instrument cover re-
moved.)
6.
Combination meter M24
A: 4WD warning lamp
B: 4LO indicator lamp
C: 4WD shift indicator lamp
D: ATP warning lamp
7.
4WD shift switch M138
1.
Mainshaft
2.
Rear case
3.
Oil pump assembly
4.
Clutch gear
5.
2-4 shift fork
6.
2-4 sleeve
7.
Drive chain
8.
Sprocket
9.
L-H shift fork
10. L-H sleeve
11. Internal gear
12. Front case
13. Planetary carrier assembly
14. Sun gear assembly
15. L-H shift rod
16. Control shift rod
17. Companion flange
18. Front drive shaft
19. Transfer control device
WDIA0222E
August 2012
2012 Pathfinder
DLN-200
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
4WD SYSTEM
Power Transfer
INFOID:0000000007357489
POWER TRANSFER DIAGRAM
POWER TRANSFER FLOW
1.
Mainshaft
2.
Clutch gear
3.
2-4 sleeve
4.
Drive chain
5.
Sprocket
6.
L-H sleeve
7.
Planetary carrier assembly
8.
Sun gear assembly
9.
Front drive shaft
WDIA0223E
August 2012
2012 Pathfinder
4WD SYSTEM
DLN-201
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
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SDIA2213E
August 2012
2012 Pathfinder
DLN-202
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
CONSULT Function (ALL MODE AWD/4WD)
INFOID:0000000007357490
FUNCTION
CONSULT can display each diagnostic item using the following direct diagnostic modes.
SELF DIAGNOSTIC RESULT
Operation Procedure
1. Connect “CONSULT”.
2. With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing operation.
NOTE:
The details for "TIME" are as follows:
• "0": Error currently detected with transfer control unit.
• Except for "0": Error detected in the past and memorized with transfer control unit.
Detects frequency of driving after DTC occurs (frequency of turning ignition switch "ON/OFF").
How to Erase Self-diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine and select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT.
3. Touch “ERASE” on CONSULT screen to erase DTC memory.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT)
Description
If the engine starts when there is something wrong with the 4WD system, the 4WD warning lamp turns ON or
flickers in the combination meter. When the system functions properly, the warning lamp turns ON when the
ignition switch is turned to “ON”, and it turns OFF after engine starts. To locate the cause of a problem, start
the self-diagnosis function. The 4WD warning lamp in the combination meter will indicate the problem area by
flickering according to the self-diagnostic results. Refer to
.
Diagnostic Procedure
1. Warn up engine.
2. Turn ignition switch “ON” and “OFF” at least twice, and then turn ignition switch “OFF”.
3. Move A/T selector lever to “P” position.
4. Turn 4WD shift switch to “2WD” position.
5. Turn ignition switch “ON”. (Do not start engine.)
6. 4WD warning lamp ON.
If 4WD warning lamp does not turn ON, refer to
DLN-255, "Diagnosis Procedure"
7. Move A/T selector lever to “R” position.
8. Turn 4WD shift switch to “2WD”, “4H” and “2WD” in order.
9. Move A/T selector lever to “P” position.
10. Turn 4WD shift switch to “4H”, “2WD” and “4H” in order.
11. Move A/T selector lever to “N” position.
12. Turn 4WD shift switch to “2WD” position.
13. Move A/T selector lever to “P” position.
14. Read the flickering of 4WD warning lamp.
Direct Diagnostic Mode
Description
Self Diagnostic Result
The transfer control unit self diagnostic results are displayed.
Data Monitor
The transfer control unit input/output data is displayed in real time.
CAN Diag Support Monitor
The result of transmit/receive diagnosis of CAN communication is diplayed.
August 2012
2012 Pathfinder
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-203
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
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Self-diagnosis example
DATA MONITOR
Operation Procedure
1. Connect “CONSULT.”
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
×
: Standard –: Not applicable
PDIA0227E
Monitor Item (Unit)
Selection
Description
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELECTION
FROM MENU
VHCL/S SEN·FR [km/h] or [mph]
×
–
×
Wheel speed calculated by ABS actuator
and electric unit (control unit).
Signal input with CAN communication line.
VHCL/S SEN·RR [km/h] or [mph]
×
–
×
Wheel speed calculated by TCM.
Signal input with CAN communication line.
ENGINE SPEED [rpm]
×
–
×
Engine speed is displayed.
Signal input with CAN communication line.
BATTERY VOLT [V]
×
–
×
Power supply voltage for transfer control
unit.
2WD SWITCH [On/Off]
×
–
×
4WD shift switch signal status is displayed.
(4L means 4LO of 4WD shift switch.)
4H SWITCH [On/Off]
×
–
×
4L SWITCH [On/Off]
×
–
×
4L POSI SW [On/Off]
×
–
×
4LO switch signal status is displayed.
ATP SWITCH [On/Off]
×
–
×
ATP switch signal status is displayed.
WAIT DETCT SW [On/Off]
×
–
×
Wait detection switch signal status is dis-
played.
4WD MODE [2H/4H/4L]
–
×
×
Control status of 4WD recognized by trans-
fer control unit. (2WD, 4H or 4LO)
VHCL/S COMP [km/h] or [mph]
–
×
×
Vehicle speed recognized by transfer con-
trol unit.
SHIFT ACT 1 [On/Off]
–
×
×
Output condition to actuator motor (clock-
wise)
SHIFT AC MON1 [On/Off]
–
–
×
Check signal for transfer control unit signal
output
SHIFT ACT 2 [On/Off]
–
×
×
Output condition to actuator motor (coun-
terclockwise)
SHIFT AC MON2 [On/Off]
–
–
×
Check signal for transfer control unit signal
output
August 2012
2012 Pathfinder
DLN-204
< SYSTEM DESCRIPTION >
[TRANSFER: TX15B]
DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
SFT ACT/R MON [On/Off]
–
–
×
Operating condition of actuator motor relay
(integrated in transfer control unit)
SHIFT POS SW1 [On/Off]
×
–
×
Condition of actuator position switch 1
SHIFT POS SW2 [On/Off]
×
–
×
Condition of actuator position switch 2
SHIFT POS SW3 [On/Off]
×
–
×
Condition of actuator position switch 3
SHIFT POS SW4 [On/Off]
×
–
×
Condition of actuator position switch 4
4WD FAIL LAMP [On/Off]
–
×
×
Control status of 4WD warning lamp is dis-
played.
2WD IND [On/Off]
–
–
×
Control status of 4WD shift indicator lamp
(rear) is displayed.
4H IND [On/Off]
–
–
×
Control status of 4WD shift indicator lamp
(front and center) is displayed.
4L IND [On/Off]
–
–
×
Control status of 4LO indicator lamp is dis-
played.
Monitor Item (Unit)
Selection
Description
ECU INPUT
SIGNALS
MAIN
SIGNALS
SELECTION
FROM MENU
August 2012
2012 Pathfinder
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