Nissan Pathfinder (2009 year). Instruction — part 203

DLN-106

< ECU DIAGNOSIS >

[TRANSFER: ATX14B]

TRANSFER CONTROL UNIT

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.

2009 Pathfinder

4WD SYSTEM SYMPTOMS

DLN-107

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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SYMPTOM DIAGNOSIS

4WD SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000003937273

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

DLN-22, "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-108

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

Ignition switch: ON

DLN-111

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

Engine running

DLN-114

ATP warning lamp does not turn ON

Engine running

DLN-116

4WD shift indicator lamp keeps flashing

Engine running

DLN-118

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

While driving

DLN-119

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

While driving

DLN-120

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

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

to either side

DLN-121

ATP switch does not operate

Engine running

DLN-123

4WD system does not operate

While driving

DLN-125

2009 Pathfinder

DLN-108

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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

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

Description

INFOID:0000000003937274

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:0000000003937275

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-27, "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

2009 Pathfinder

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

DLN-109

< 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 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

2009 Pathfinder

DLN-110

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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

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-85, "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

2009 Pathfinder

4WD WARNING LAMP DOES NOT TURN ON

DLN-111

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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4WD WARNING LAMP DOES NOT TURN ON

Description

INFOID:0000000003937276

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

Diagnosis Procedure

INFOID:0000000003937277

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-27, "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

2009 Pathfinder

DLN-112

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

4WD WARNING LAMP DOES 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 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

2009 Pathfinder

4WD WARNING LAMP DOES NOT TURN ON

DLN-113

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX14B]

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5.

CHECK INDICATOR LAMP CIRCUIT

1.

Connect combination meter harness connector.

2.

Disconnect transfer control unit harness connector.

3.

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

4.

Ground the following terminal using suitable wiring.

-

Transfer control unit harness connector M152 terminal 5 and
ground.

Does 4WD warning lamp 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-85, "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.

SDIA2774E

2009 Pathfinder