Nissan Pathfinder (2008 year). Manual — part 190

DLN-104

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

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-70

.

10

Neutral-4LO switch

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

Refer to

DLN-31

.

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-73

.

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-76

.

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-55

.

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-79

.

15

Power supply

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

Refer to

DLN-25

.

16

4WD shift switch

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

Refer to

DLN-34

.

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-80

.

18

Wait detection switch

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

Refer to

DLN-38

.

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-42

.

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-48

.

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-51

.

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-81

.

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-82

.

24

PNP switch signal
(from TCM)

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

Refer to

DLN-41

.

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-25

.

No flickering

PNP switch or 4WD
shift switch

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

Refer to

DLN-41

or

DLN-34

.

Flashing pattern

Item

Diagnostic item is detected when...

Reference

TRANSFER CONTROL UNIT

DLN-105

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

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CAUTION:

• If CAN communication is displayed with other DTCs, first perform the trouble diagnosis for CAN communication line.

• If ABS operation signal, VDC operation signal or TCS operation signal is displayed, first perform the trouble diagnosis for

ABS system.

• If Output shaft revolution signal is displayed, first perform the trouble diagnosis for A/T system.

NOTE:

• If actuator position switch or actuator circuit is displayed, first erase self-diagnostic results. (Actuator position switch or actuator circuit

may be displayed after installing transfer control unit or transfer assembly.)

• If clutch pressure switch or line pressure switch 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.

DLN-106

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

4WD SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

4WD SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000001728419

If 4WD warning lamp turns ON, perform self-diagnosis. Refer to

DLN-20, "CONSULT-III Function (ALL MODE AWD/4WD)"

.

NOTE:
• Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a

malfunction.

• Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift

switch is 4H or 4LO, steering wheel is turned fully to either side.

Symptom

Condition

Reference page

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

Ignition switch: ON

DLN-107

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

Ignition switch: ON

DLN-110

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

Engine running

DLN-113

ATP warning lamp does not turn ON

Engine running

DLN-115

4WD shift indicator lamp keeps flashing

Engine running

DLN-117

4WD warning lamp flashes rapidly (2 times/second)

While driving

DLN-118

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

While driving

DLN-119

Heavy tight-corner braking symptom occurs
(See NOTE.)

• While driving
• AUTO mode
• Steering wheel is turned fully

to either side

DLN-120

ATP switch does not operate

Engine running

DLN-122

4WD system does not operate

While driving

DLN-124

4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON

DLN-107

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT
TURN ON

Description

INFOID:0000000001728420

4WD shift indicator lamp and 4LO indicator lamp do not turn ON for approx. 1 second when turning ignition
switch to ON.

Diagnosis Procedure

INFOID:0000000001728421

1.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT

1.

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

2.

Connect transfer control unit harness connector.

3.

Check voltage between transfer control unit harness connector
terminals and ground.

4.

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

5.

Check voltage between transfer control unit harness connector
terminals and ground.

OK or NG

OK

>> GO TO 2.

NG

>>

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

• 10A fuses [No. 21 located in fuse block (J/B) and No. 59 (located in the fuse and relay box)].
• Harness for short or open between battery and transfer control unit harness connector M153

terminals 47.

• Harness for short or open between ignition switch and transfer control unit harness connector

M153 terminal 29.

• Harness for short or open between battery and transfer shut off relay harness connector E155

terminal 1 and 3.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 2

and transfer control unit harness connector M153 terminal 30.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 5

and transfer control unit harness connector M152 terminals 16 and 22.

• Battery and ignition switch.
• Transfer shut off relay. Refer to

DLN-25, "Diagnosis Procedure"

.

2.

CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT

1.

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

2.

Disconnect transfer control unit harness connector.

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

0V

22 - Ground

M153

29 - Ground

30 - Ground

Battery voltage

47 - Ground

WDIA0165E

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

Battery voltage

22 - Ground

M153

29 - Ground

30 - Ground

0V

47 - Ground

Battery voltage

WDIA0166E

DLN-108

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON

3.

Check continuity between transfer control unit harness connec-
tor M152 terminals 3 and 6, and M153 terminal 45 and ground.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to power in harness or con-

nectors.

3.

CHECK COMBINATION METER POWER SUPPLY CIRCUIT

1.

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

2.

Disconnect transfer control unit harness connector.

3.

Check voltage between combination meter harness connector
terminal and ground.

4.

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

5.

Check voltage between combination meter harness connector
terminal and ground.

OK or NG

OK

>> GO TO 4.

NG

>>

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

• 10A fuse [No. 14, located in the fuse block (J/B)].
• Harness for short or open between ignition switch and combination meter harness connector

M24 terminal 16.

• Ignition switch.

4.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER

1.

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

2.

Disconnect transfer control unit harness connector and combination meter harness connector.

3.

Check continuity between the following terminals.

-

Transfer control unit harness connector M152 terminal 2 and
combination meter harness connector M24 terminal 30.

-

Transfer control unit harness connector M152 terminal 11 and
combination meter harness connector M24 terminal 27.

-

Transfer control unit harness connector M152 terminal 12 and
combination meter harness connector M24 terminal 29.

-

Transfer control unit harness connector M152 terminal 21 and
combination meter harness connector M24 terminal 28.

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

OK or NG

Continuity should exist.

SDIA2691E

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

0V

SDIA2762E

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

Battery voltage

SDIA2763E

Continuity should exist.

SDIA2771E

4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON

DLN-109

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

5.

CHECK INDICATOR LAMP CIRCUIT

1.

Connect combination meter harness connector.

2.

Disconnect transfer control unit harness connector.

3.

Turn ignition switch “ON”.

4.

Ground the following terminals using suitable wiring.

-

Transfer control unit harness connector M152 terminal 2 and
ground.

-

Transfer control unit harness connector M152 terminal 11 and
ground.

-

Transfer control unit harness connector M152 terminal 12 and
ground.

-

Transfer control unit harness connector M152 terminal 21 and
ground.

Do indicator lamps turn on?

OK

>> GO TO 6.

NG

>> Replace combination meter. Refer to

MWI-94, "Removal

and Installation"

.

6.

SYMPTOM CHECK

Check again.

OK or NG

OK

>> Inspection End.

NG

>> GO TO 7.

7.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to

DLN-83, "Reference Value"

.

OK or NG

OK

>> Inspection End.

NG

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

SDIA2772E

DLN-110

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

4WD WARNING LAMP DOES NOT TURN ON

4WD WARNING LAMP DOES NOT TURN ON

Description

INFOID:0000000001728422

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

Diagnosis Procedure

INFOID:0000000001728423

1.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT

1.

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

2.

Connect transfer control unit harness connector.

3.

Check voltage between transfer control unit harness connector
terminals and ground.

4.

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

5.

Check voltage between transfer control unit harness connector
terminals and ground.

OK or NG

OK

>> GO TO 2.

NG

>>

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

• 10A fuses [No. 21 located in fuse block (J/B) and No. 59 (located in the fuse and relay box)].
• Harness for short or open between battery and transfer control unit harness connector M153

terminals 47.

• Harness for short or open between ignition switch and transfer control unit harness connector

M153 terminal 29.

• Harness for short or open between battery and transfer shut off relay harness connector E155

terminal 1 and 3.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 2

and transfer control unit harness connector M153 terminal 30.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 5

and transfer control unit harness connector M152 terminals 16 and 22.

• Battery and ignition switch.
• Transfer shut off relay. Refer to

DLN-25, "Diagnosis Procedure"

.

2.

CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT

1.

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

2.

Disconnect transfer control unit harness connector.

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

0V

22 - Ground

M153

29 - Ground

30 - Ground

Battery voltage

47 - Ground

WDIA0165E

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

Battery voltage

22 - Ground

M153

29 - Ground

30 - Ground

0V

47 - Ground

Battery voltage

WDIA0166E

4WD WARNING LAMP DOES NOT TURN ON

DLN-111

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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3.

Check continuity between transfer control unit harness connec-
tor M152 terminals 3 and 6, and M153 terminal 45 and ground.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to power in harness or con-

nectors.

3.

CHECK COMBINATION METER POWER SUPPLY CIRCUIT

1.

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

2.

Disconnect transfer control unit harness connector.

3.

Check voltage between combination meter harness connector
terminal and ground.

4.

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

5.

Check voltage between combination meter harness connector
terminal and ground.

OK or NG

OK

>> GO TO 4.

NG

>>

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

• 10A fuse [No. 14, located in the fuse block (J/B)].
• Harness for short or open between ignition switch and combination meter harness connector

M24 terminal 16.

• Ignition switch.

4.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER

1.

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

2.

Disconnect transfer control unit harness connector and combination meter harness connector.

3.

Check continuity between transfer control unit and combination meter.

-

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

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

Continuity should exist.

SDIA2691E

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

0V

SDIA2762E

Connector

Terminal

Voltage (Approx.)

M24

16 - Ground

Battery voltage

SDIA2763E

A

B

Continuity

Connector

Terminal

Connector

Terminal

Transfer

control

unit: M152

5

Combination

meter: M24

26

Yes

WDIA0293E