Nissan Pathfinder (2009 year). Instruction - part 202

DLN-98

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

ABDIA0124GB

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-99

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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ABDIA0125GB

2009 Pathfinder

DLN-100

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

ABDIA0126GB

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-101

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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ABDIA0127GB

2009 Pathfinder

DLN-102

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

DTC Index

INFOID:0000000003937272

DTC CHART

ABDIA0128GB

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-103

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1802]

CONTROL UNIT 1

Malfunction is detected in the memory (RAM) sys-
tem of transfer control unit.

Refer to 

DLN-29

.

[P1803]

CONTROL UNIT 2

Malfunction is detected in the memory (ROM) sys-
tem of transfer control unit.

[P1804]

CONTROL UNIT 3

Malfunction is detected in the memory (EEPROM) 
system of transfer control unit.

[P1807]

VHCL SPEED SEN·AT

• Malfunction is detected in output shaft revolution 

signal that is output from TCM through CAN com-
munication.

• Improper signal is input while driving.

Refer to 

DLN-31

.

[P1808]

VHCL SPEED SEN·ABS

• Malfunction is detected in vehicle speed signal 

that is output from ABS actuator and electric unit 
(control unit) through CAN communication.

• Improper signal is input while driving.

Refer to 

DLN-32

.

[P1809]

CONTROL UNIT 4

AD converter system of transfer control unit is mal-
functioning.

Refer to 

DLN-29

.

[P1810]

4L POSI SW TF

Improper signal from neutral-4LO switch is input due 
to open or short circuit.

Refer to 

DLN-33

.

[P1811]

BATTERY VOLTAGE

Power supply voltage for transfer control unit is ab-
normally low while driving.

Refer to 

DLN-27

.

[P1813]

4WD MODE SW

More than two switch inputs are simultaneously de-
tected due to short circuit of 4WD shift switch.

Refer to 

DLN-36

.

[P1814]

4WD DETECT SWITCH

Improper signal from wait detection switch is input 
due to open or short circuit.

Refer to 

DLN-40

.

[P1816]

PNP SW/CIRC

When A/T PNP switch signal is malfunction or com-
munication error between the control units.

Refer to 

DLN-43

.

[P1817]

SHIFT ACTUATOR

• Motor does not operate properly due to open or 

short circuit in actuator motor.

• Malfunction is detected in the actuator motor. 

(When 4WD shift switch is operated and actuator 
motor is not operated)

• Malfunction is detected in transfer shift high relay 

and transfer shift low relay.

Refer to 

DLN-44

.

[P1818]

SHIFT ACT POSI SW

• Improper signal from actuator position switch is in-

put due to open or short circuit.

• Malfunction is detected in the actuator position 

switch.

Refer to 

DLN-50

.

[P1819]

SHIFT ACT CIR

• Transfer control device actuator circuit is shorted 

or open. (Malfunctions are detected when transfer 
shift relay circuit is open/shorted or relay monitor 
circuit is open/shorted.)

• Malfunction occurs in transfer control device drive 

circuit.

• Malfunction is detected in transfer shut off relay.

Refer to 

DLN-53

.

[P1820]

ENGINE SPEED SIG

• Malfunction is detected in engine speed signal 

that is output from ECM through CAN communi-
cation. 

• Improper signal is input while driving.

Refer to 

DLN-57

.

[P1822]

DUTY SOLENOID

Proper voltage is not applied to clutch pressure so-
lenoid valve due to open or short circuit.

Refer to 

DLN-58

.

[P1823]

2-4WD SOLENOID

Proper voltage is not applied to 2-4WD solenoid 
valve due to open or short circuit.

Refer to 

DLN-62

.

[P1824]

MOTOR RELAY

Motor does not operate properly due to open or 
short circuit in transfer motor or transfer motor relay.

Refer to 

DLN-66

.

2009 Pathfinder

DLN-104

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

CAUTION:

• If CAN COMM CIRCUIT [U1000] or CONTROL UNIT (CAN) [U1010] are displayed with other DTCs, first perform the trouble

diagnosis for CAN communication line.

• If ABS OP SIG [P1830], VDC OP SIG [P1831] or TCS OP SIG [P1832] is displayed, first perform the trouble diagnosis for ABS

system.

• If VHCL SPEED SEN·AT [P1807] is displayed, first perform the trouble diagnosis for A/T system.

NOTE:

• If SHIFT ACT POSI SW [P1818] or SHIFT ACT CIR [P1819] is displayed, first erase self-diagnostic results. (SHIFT ACT POSI SW

[P1818] or SHIFT ACT CIR [P1819] may be displayed after installing transfer control unit or transfer assembly.)

• If CL PRES SW [P1827] or LINE PRES SW [P1828] is displayed only while driving in reverse, check the continuity of R position on A/

T PNP switch. When there is no malfunction found in the electrical system, check the hydraulic system.

FLASH CODE CHART

[P1826]

OIL TEMP SEN

Signal voltage from transfer fluid temperature sen-
sor is abnormally high (Transfer fluid temperature is 
abnormally low) while driving.

Refer to 

DLN-72

.

[P1827]

CLUTCH PRES SW

• Improper signal from clutch pressure switch is in-

put due to open or short circuit.

• Malfunction occurs in clutch pressure switch or 

hydraulic circuit.

Refer to 

DLN-75

.

[P1828]

LINE PRES SW

• Improper signal from line pressure switch is input 

due to open or short circuit.

• Malfunction occurs in line pressure switch or hy-

draulic circuit.

Refer to 

DLN-78

.

[P1829]

THROTTLE POSI SEN

• Malfunction is detected in accelerator pedal posi-

tion signal that is output from ECM through CAN 
communication.

• Signal voltage from accelerator pedal position 

sensor is abnormally high or low.

Refer to 

DLN-81

.

[P1830]

ABS OP SIG

Malfunction is detected in ABS operation signal that 
is output from ABS actuator and electric unit (control 
unit) through CAN communication.

Refer to 

DLN-82

.

[P1831]

VDC OP SIG

Malfunction is detected in VDC operation signal that 
is output from ABS actuator and electric unit (control 
unit) through CAN communication.

Refer to 

DLN-83

.

[P1832]

TCS OP SIG

Malfunction is detected in TCS operation signal that 
is output from ABS actuator and electric unit (control 
unit) through CAN communication.

Refer to 

DLN-84

.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

Flashing pattern

Item

Diagnostic item is detected when...

Reference

2

Vehicle speed signal 
(from A/T)

• Malfunction is detected in output shaft revolution signal 

that is output from TCM through CAN communication.

• Improper signal is input while driving.

Refer to 

DLN-31

.

3

Clutch pressure sole-
noid signal

Proper voltage is not applied to clutch pressure solenoid 
valve due to open or short circuit.

Refer to 

DLN-58

.

4

2-4WD solenoid signal

Proper voltage is not applied to 2-4WD solenoid valve due 
to open or short circuit.

Refer to 

DLN-62

.

5

Transfer motor

Transfer motor does not operate properly due to open or 
short circuit in transfer motor or transfer motor relay.

Refer to 

DLN-66

.

6

Vehicle speed signal 
(from ABS)

• Malfunction is detected in vehicle speed signal that is out-

put from ABS actuator and electric unit (control unit) 
through CAN communication.

• Improper signal is input while driving.

Refer to 

DLN-32

.

7

CAN communication

Malfunction has been detected from CAN communication 
line.

Refer to 

DLN-19

8

AD converter

AD converter system of transfer control unit is malfunction-
ing.

Refer to 

DLN-29

.

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-105

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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9

Transfer fluid tempera-
ture

Signal voltage from transfer fluid temperature sensor is ab-
normally high (Transfer fluid temperature is abnormally low) 
while driving.

Refer to 

DLN-72

.

10

Neutral-4LO switch

Improper signal from neutral-4LO switch is input due to 
open or short circuit.

Refer to 

DLN-33

.

11

Clutch pressure switch

• Improper signal is input due to open or short circuit.
• Malfunction occurs in clutch pressure switch or hydraulic 

circuit.

Refer to 

DLN-75

.

12

Line pressure switch

• Improper signal is input due to open or short circuit.
• Malfunction occurs in line pressure switch or hydraulic 

circuit.

Refer to 

DLN-78

.

13

Engine speed signal 
(from ECM)

• Malfunction is detected in engine speed signal that is out-

put from ECM through CAN communication. 

• Improper signal is input while driving.

Refer to 

DLN-57

.

14

Accelerator pedal posi-
tion sensor (from 
ECM)

• Malfunction is detected in accelerator pedal position sig-

nal that is output from ECM through CAN communication.

• Signal voltage from accelerator pedal position sensor is 

abnormally high or low.

Refer to 

DLN-81

.

15

Power supply

Power supply voltage for transfer control unit is abnormally 
low while driving.

Refer to 

DLN-27

.

16

4WD shift switch

More than two switch inputs are simultaneously detected 
due to short circuit of 4WD shift switch.

Refer to 

DLN-36

.

17

ABS operation signal 
(from ABS)

Malfunction is detected in ABS operation signal that is out-
put from ABS actuator and electric unit (control unit) 
through CAN communication.

Refer to 

DLN-82

.

18

Wait detection switch

Improper signal from wait detection switch is input due to 
open or short circuit.

Refer to 

DLN-40

.

19

Actuator motor

• Motor does not operate properly due to open or short cir-

cuit in actuator motor.

• Malfunction is detected in the actuator motor. (When 

4WD shift switch is operated and actuator motor is not 
operated)

• Malfunction is detected in transfer shift high relay and 

transfer shift low relay.

Refer to 

DLN-44

.

20

Actuator position 
switch

• Improper signal from actuator position switch is input due 

to open or short circuit.

• Malfunction is detected in the actuator position switch.

Refer to 

DLN-50

.

21

Actuator circuit

• Transfer control device actuator circuit is shorted or open. 

(Malfunctions are detected when motor relay circuit is 
open/shorted or relay transfer shift circuit is open/short-
ed.)

• Malfunction occurs in transfer control device drive circuit.

Refer to 

DLN-53

.

22

VDC operation signal 
(from VDC)

Malfunction is detected in VDC operation signal that is out-
put from ABS actuator and electric unit (control unit) 
through CAN communication.

Refer to 

DLN-83

.

23

TCS operation signal 
(from TCS)

Malfunction is detected in TCS operation signal that is out-
put from ABS actuator and electric unit (control unit) 
through CAN communication.

Refer to 

DLN-84

.

24

PNP switch signal 
(from TCM)

When A/T PNP switch signal is malfunction or communica-
tion error between the vehicles.

Refer to 

DLN-43

.

Repeats flickering 
every 2 to 5 sec.

—

System normal.

—

Repeats flickering 
every 0.25 sec.

Data erase display

• Power supply failure of memory back-up.
• Battery performance is poor.

Refer to 

DLN-27

.

No flickering

PNP switch or 4WD 
shift switch

PNP switch or 4WD shift switch circuit is shorted or open.

Refer to 

DLN-43

 or 

DLN-36

.

Flashing pattern

Item

Diagnostic item is detected when...

Reference

2009 Pathfinder