Nissan Pathfinder (2009 year). Manual - part 220

DLN-242

< ECU DIAGNOSIS >

[TRANSFER: TX15B]

TRANSFER CONTROL UNIT

ABDIA0118GB

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-243

< ECU DIAGNOSIS >

[TRANSFER: TX15B]

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ABDIA0119GB

2009 Pathfinder

DLN-244

< ECU DIAGNOSIS >

[TRANSFER: TX15B]

TRANSFER CONTROL UNIT

ABDIA0120GB

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-245

< ECU DIAGNOSIS >

[TRANSFER: TX15B]

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DTC Index

INFOID:0000000003937366

DTC CHART

ABDIA0121GB

2009 Pathfinder

DLN-246

< ECU DIAGNOSIS >

[TRANSFER: TX15B]

TRANSFER CONTROL UNIT

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.)

FLASH CODE CHART

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1801]

*INITIAL START*

Due to removal of battery which cuts off power sup-
ply to transfer control unit, self-diagnosis memory 
function is suspended.

DLN-202

[P1802]

CONTROL UNIT (1,2,3)

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

DLN-205

[P1803]

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

[P1804]

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 
communication.

• Improper signal is input while driving.

DLN-207

[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.

DLN-208

[P1809]

CONTROL UNIT 4

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

DLN-205

[P1810]

4L POSI SW TF

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

DLN-209

[P1811]

BATTERY VOLTAGE

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

DLN-202

[P1813]

4WD MODE SW

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

DLN-212

[P1814]

4WD DETECT SWITCH

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

DLN-215

[P1816]

PNP SW/CIRC

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

DLN-218

[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 

or transfer shift low relay.

DLN-219

[P1818]

SHIFT ACT POSI SW

• Improper signal from actuator position switch is 

input due to open or short circuit.

• Malfunction is detected in actuator position 

switch.

DLN-226

[P1819]

SHIFT ACT CIR

• Malfunction is detected in transfer shut off relay 

1 and transfer shut off relay 2.

• Malfunction occurs in transfer control device 

drive circuit.

DLN-229

[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.

DLN-232

2009 Pathfinder

TRANSFER CONTROL UNIT

DLN-247

< ECU DIAGNOSIS >

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NOTE:

If actuator position switch” or transfer control device” is displayed, first erase self-diagnostic results. (They may be displayed after install-
ing transfer control unit or transfer assembly.)

Flashing pattern

Item

Diagnostic item is detected when...

Reference

2

Output shaft revolution 
signal (from TCM)

• Malfunction is detected in output shaft revo-

lution  signal that is output from TCM through 
CAN communication.

• Improper signal is input while driving.

DLN-207

3

Vehicle speed signal 
(from ABS)

• Malfunction is detected in vehicle speed sig-

nal that is output from ABS actuator and 
electric unit (control unit) through CAN com-
munication.

• Improper signal is input while driving.

DLN-208

4

CAN communication

Malfunction has been detected from CAN 
communication.

DLN-195

5

AD converter

AD converter system of transfer control unit is 
malfunctioning.

DLN-205

6

4LO  switch

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

DLN-209

7

Engine speed signal

• Malfunction is detected in engine speed sig-

nal that is output from ECM through CAN 
communication.

• Improper signal is input while driving.

DLN-232

8

Power supply

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

DLN-202

9

4WD shift switch

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

DLN-212

10

Wait detection switch

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

DLN-215

11

Actuator motor

• Motor does not operate properly due to open 

or short circuit in actuator motor.

• Malfunction is detected in the actuator mo-

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

• Malfunction is detected in transfer shift high 

relay or transfer shift low relay.

DLN-219

12

Actuator position 
switch

• Improper signal from actuator position 

switch is input due to open or short circuit.

• Malfunction is detected in the actuator posi-

tion switch.

DLN-226

13

Transfer control device

• Malfunction is detected in transfer shut off 

relay 1 and transfer shut off 2.

• Malfunction occurs in transfer control device 

drive circuit.

, 

DLN-229

14

PNP switch signal

When A/T PNP switch signal is malfunction or 
communication error between the vehicles.

DLN-218

Repeats flickering 

every 0.25 sec.

Data erase display

• Power supply failure of memory back-up.
• Battery is disconnected for a long time.
• Battery performance is poor.

DLN-202

Repeats flickering 

every 2 to 5 sec.

—

Circuits that the self-diagnosis covers have no 
malfunction.

—

No flickering

PNP switch or 4WD 
shift switch

PNP switch or 4WD shift switch circuit is short-
ed or open.

DLN-218

 or 

DLN-212

2009 Pathfinder

DLN-248

< SYMPTOM DIAGNOSIS >

[TRANSFER: TX15B]

4WD SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

4WD SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000003937367

Symptom

Condition

Reference page

4WD shift indicator lamp and 4LO indicator lamp do not turn ON (lamp check)

Ignition switch: ON

DLN-251

4WD warning lamp does not turn ON (lamp check)

DLN-249

4WD shift indicator lamp or 4LO indicator lamp does not change

Engine running

DLN-253

ATP warning lamp does not turn ON

DLN-255

ATP switch is malfunctioning

DLN-259

4WD shift indicator lamp repeats flashing

While driving

DLN-257

4WD warning lamp flashes slowly (1 time/2 seconds)

DLN-258

2009 Pathfinder

4WD WARNING LAMP DOES NOT TURN ON

DLN-249

< SYMPTOM DIAGNOSIS >

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4WD WARNING LAMP DOES NOT TURN ON

Description

INFOID:0000000003937368

4WD warning lamp does not turn ON when turning ignition switch to ON.

Diagnosis Procedure

INFOID:0000000003937369

1.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Refer to 

DLN-202, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Perform repairs as necessary.

2.

CHECK COMBINATION METER POWER SUPPLY CIRCUIT

1.

Turn ignition switch “OFF”.  (Stay for at least 5 seconds.)

2.

Disconnect combination meter harness connector.

3.

Check voltage between combination meter harness connector
terminals and ground.

4.

Turn ignition switch “ON”. (Do not start engine.)

5.

Check voltage between combination meter harness connector
terminals and ground.

Are the inspection results normal?

YES 

>> GO TO 3.

NO

>>

Check the following. If any items are damaged, repair
or replace damaged parts.

• 10A fuse [No. 14, located in the fuse block (J/B)] or

ignition switch.

• Harness for short or open between ignition switch and combination meter harness connector

terminal 16

3.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER

1.

Turn ignition switch “OFF”.  (Stay for at least 5 seconds.)

2.

Check continuity between transfer control unit harness connec-
tor M166 terminal 38 and combination meter harness connector
M24 terminal 28.

Also check harness for short to ground and short to power.

Is there continuity?

YES 

>> GO TO 4.

NO

>> Repair or replace damaged parts.

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

0V

WDIA0178E

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

Battery voltage

WDIA0179E

Continuity should exist.

WDIA0180E

2009 Pathfinder