Nissan Pathfinder (2012 year). Manual — part 476

MWI

POWER SUPPLY AND GROUND CIRCUIT

MWI-33

< DTC/CIRCUIT DIAGNOSIS >

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure

INFOID:0000000007830118

Regarding Wiring Diagram information, refer to

PCS-22, "Wiring Diagram"

.

1.

CHECK FUSES AND FUSIBLE LINK

Check that the following IPDM E/R fuses or fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

CHECK BATTERY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R.

3. Check voltage between IPDM E/R harness connectors and

ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between IPDM E/R harness connectors and

ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

Terminal No.

Signal name

Fuses and fusible link No.

1

Battery

A, D

2

Battery

C

Terminals

Ignition switch position

(+)

(

−

)

OFF

ON

START

Connector

Terminal

E118

1

Ground

Battery
voltage

Battery
voltage

Battery
voltage

2

Battery
voltage

Battery
voltage

Battery
voltage

SKIA1987E

IPDM E/R

Ground

Continuity

Connector

Terminal

E122 (A)

38

Yes

E124 (B)

59

AWMIA0024ZZ

August 2012

2012 Pathfinder

MWI-34

< DTC/CIRCUIT DIAGNOSIS >

FUEL LEVEL SENSOR SIGNAL CIRCUIT

FUEL LEVEL SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000007347477

The fuel level sensor unit and fuel pump detects the approximate fuel level in the fuel tank and transmits the

fuel level signal to the combination meter.

Component Function Check

INFOID:0000000007347478

1.

COMBINATION METER INPUT SIGNAL

1. Select “METER/M&A” on CONSULT.

2. Using “FUEL METER” of “DATA MONITOR”, compare the value of DATA MONITOR with fuel gauge

pointer of combination meter.

Does the data monitor value approximately match the fuel gauge indication?

YES

>> Inspection End.

NO

>> Replace combination meter. Refer to

MWI-89, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000007347479

Regarding Wiring Diagram information, refer to

MWI-63, "Wiring Diagram"

.

1.

CHECK HARNESS CONNECTOR

1. Turn ignition switch OFF.

2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor con-

nection.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace terminals or connectors.

2.

CHECK FUEL LEVEL SENSOR UNIT CIRCUIT

1. Disconnect combination meter connector and fuel level sensor

unit connector.

2. Check continuity between combination meter harness connector

and fuel level sensor unit and fuel pump harness connector.

3. Check continuity between fuel level sensor unit and fuel pump

harness connector and ground.

Fuel gauge pointer

Reference value of data monitor [lit.]

Full

Approx. 79.3

3/4

Approx. 58.5

1/2

Approx. 37.1

1/4

Approx. 22.4

Empty

Approx. 7.6

Terminals

Continuity

(+)

(-)

Connector

Terminal

Connector

Terminal

C5

2

M24

9

Yes

WKIA3288E

August 2012

2012 Pathfinder

MWI

FUEL LEVEL SENSOR SIGNAL CIRCUIT

MWI-35

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK FUEL LEVEL SENSOR UNIT GROUND CIRCUIT

1. Check continuity between combination meter harness connector

and fuel level sensor unit and fuel pump harness connector.

2. Check continuity between fuel level sensor unit and fuel pump

harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK INSTALLATION CONDITION

Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the

internal components in the fuel tank.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Install the fuel level sensor unit properly.

Component Inspection

INFOID:0000000007347480

1.

REMOVE FUEL LEVEL SENSOR UNIT

Remove the fuel level sensor unit. Refer to

FL-11, "Removal and Installation"

.

>> GO TO 2

2.

CHECK FUEL LEVEL SENSOR UNIT AND FUEL PUMP

Terminals

Continuity

(+)

(-)

Connector

Terminal

Ground

C5

2

No

Terminals

Continuity

(+)

(-)

Connector

Terminal

Connector

Terminal

C5

5

M24

4

Yes

Terminals

Continuity

(+)

(-)

Connector

Terminal

Ground

C5

5

No

WKIA3289E

August 2012

2012 Pathfinder

MWI-36

< DTC/CIRCUIT DIAGNOSIS >

FUEL LEVEL SENSOR SIGNAL CIRCUIT

Check the resistance between terminals 2 and 5.

*1 and *2: When float arm is in contact with stopper.

Is inspection result normal?

YES

>> Inspection End.

NO

>> Replace fuel level sensor unit and fuel pump. Refer to

FL-11, "Removal and Installation"

.

Terminal

Float position

mm (in)

Resistance value

(Approx.)

2

5

*1

Empty

10 (0.4)

81.5

Ω

*2

Full

211.1 (8.3)

5

Ω

LKIA0402E

August 2012

2012 Pathfinder

MWI

OIL PRESSURE SWITCH SIGNAL CIRCUIT

MWI-37

< DTC/CIRCUIT DIAGNOSIS >

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OIL PRESSURE SWITCH SIGNAL CIRCUIT

Description

INFOID:0000000007347481

Detects the engine oil pressure and transmits the oil pressure switch signal to the IPDM E/R.

Component Function Check

INFOID:0000000007347482

1.

COMBINATION METER INPUT SIGNAL

1. Select “METER/M&A” on CONSULT.

2. Monitor “OIL W/L” of “DATA MONITOR” while operating ignition switch.

>> Inspection End.

Diagnosis Procedure

INFOID:0000000007347483

Regarding Wiring Diagram information, refer to

MWI-63, "Wiring Diagram"

.

1.

CHECK OIL PRESSURE SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector E122 and oil pressure switch

connector E208 (VQ40DE) or F4 (VK56DE).

3. Check continuity between IPDM E/R harness connector E122

(A) terminal 42 and oil pressure switch harness connector E208

(VQ40DE) or F4 (VK56DE) (B) terminal 1.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000007347484

1.

CHECK OIL PRESSURE SWITCH

Check continuity between oil pressure switch and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the oil pressure switch.

OIL W/L
When ignition switch is in ON
position (Engine stopped)

: ON

When engine is running

: OFF

Continuity should exist.

WKIA5607E

Condition

Oil pressure [kPa (kg/cm

2

, psi)]

Continuity

Engine stopped

Less than 29 (0.3, 4)

Yes

Engine running

More than 29 (0.3, 4)

No

ELF0044D

August 2012

2012 Pathfinder

MWI-38

< ECU DIAGNOSIS INFORMATION >

COMBINATION METER

ECU DIAGNOSIS INFORMATION

COMBINATION METER

Reference Value

INFOID:0000000007347485

TERMINAL LAYOUT

PHYSICAL VALUES

LKIA0698E

Termi-

nal

Wire

color

Item

Condition

Reference value (V)

(Approx.)

Ignition

switch

Operation or condition

2

P

Generator

ON

Generator voltage low

0

Generator voltage normal

Battery voltage

3

R/Y

Battery power supply

—

—

Battery voltage

4

B/Y

Fuel level sensor ground

ON

—

0

5

W

Vehicle speed signal out-
put

ON

Speedometer operated
[When vehicle speed is ap-
prox. 40 km/h (25 MPH)]

6

LG

Vehicle speed signal out-
put (8-pulse)

ON

Speedometer operated
[When vehicle speed is ap-
prox. 40 km/h (25 MPH)]

NOTE:

Maximum voltage may be 12V due to spec-
ifications (connected units).

9

BR

Fuel level sensor signal

—

—

Refer to

MWI-12, "FUEL GAUGE : System

Description"

.

11

P

CAN-L

—

—

—

12

L

CAN-H

—

—

—

13

GR

Ground

—

—

0

16

W/G

Ignition switch ON or
START

ON

—

Battery voltage

18

L

A/T 1st position switch
signal

—

A/T shift selector in 1st po-
sition

0

A/T shift selector in other
than 1st position

Battery voltage

ELF1080D

PKIC0643E

August 2012

2012 Pathfinder

MWI

COMBINATION METER

MWI-39

< ECU DIAGNOSIS INFORMATION >

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Fail Safe

INFOID:0000000007347486

The combination meter performs a fail-safe operation for the functions listed below when communication is

lost.

20

Y

Overdrive control switch
signal

—

Overdrive control switch
pressed

0

Overdrive control switch
released

Battery voltage

22

BR

Illumination control
switch

—

—

Refer to

INL-9, "System Description"

.

23

B

Ground

—

—

0

24

V

Seat belt buckle switch
LH

ON

Unfastened (ON)

0

Fastened (OFF)

Battery voltage

31

G

Parking brake switch

ON

Parking brake depressed

0

Parking brake released

Battery voltage

32

SB

Brake fluid level switch

ON

Brake fluid level low

0

Brake fluid level normal

Battery voltage

33

LG

Stop lamp switch

—

Brake pedal depressed

Battery voltage

Brake pedal released

0

34

L

Washer fluid level switch

ON

Washer fluid level low

0

Washer fluid level normal

Battery voltage

37

SB

Air bag warning lamp in-
put

ON

Air bag warning lamp ON

4

Air bag warning lamp OFF

0

39

G

Security indicator input

OFF

Security indicator ON

0

Security indicator OFF

Battery voltage

40

LG

Seat belt buckle switch
RH

ON

Unfastened (ON)

0

Fastened (OFF)

Battery voltage

Termi-

nal

Wire

color

Item

Condition

Reference value (V)

(Approx.)

Ignition

switch

Operation or condition

Function

Specifications

Speedometer

Zero indication.

Tachometer

Fuel gauge

Engine coolant temperature gauge

Engine oil pressure gauge

Voltage gauge

Illumination control

Meter illumination

Change to nighttime mode when communication is lost.

Segment LCD

Odometer

Freeze current indication.

A/T position

Display turns off.

Buzzer

Buzzer turns off.

August 2012

2012 Pathfinder

MWI-40

< ECU DIAGNOSIS INFORMATION >

COMBINATION METER

DTC Index

INFOID:0000000007347487

NOTE:

“TIME” indicates the following.

• 0: Indicates that a malfunction is detected at present.

• 1-63: Indicates that a malfunction was detected in the past. (Displays number of ignition switch OFF

→

ON

cycles after malfunction is detected. Self-diagnosis result is erased when “63” is exceeded.)

Warning lamp/indicator lamp

ABS warning lamp

Lamp turns on when communication is lost.

Brake warning lamp

VDC OFF indicator lamp

Malfunction indicator lamp

SLIP indicator lamp

Shift P warning lamp

Lamp turns off when communication is lost.

AT oil temp warning lamp

Low washer fluid warning lamp

Door ajar warning lamp

CRUISE indicator lamp

SET indicator lamp

A/T CHECK warning lamp (with man-
ual mode)

O/D OFF indicator lamp (without man-
ual mode)

Oil pressure warning lamp

Air bag warning lamp

High beam indicator

Turn signal indicator lamp

Intelligent Key system warning lamp

Driver and passenger seat belt warn-
ing lamp

Lamp turns off when disconnected.

Charge warning lamp

Security indicator lamp

4WD indicator lamp

ATP indicator lamp

Low tire pressure warning lamp

Lamp will flash every second for 1 minute and then stay on con-
tinuously thereafter.

Function

Specifications

CONSULT display

Malfunction

Reference

page

CAN COMM CIRC
[U1000]

Malfunction is detected in CAN communication.

CAUTION:

Even when there is no malfunction on CAN communication system, malfunction may be
misinterpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 sec-
onds) or 10A fuse [No. 19, located in the fuse block (J/B)] is disconnected.

MWI-29

VEHICLE SPEED
CIRC
[B2205]

Malfunction is detected when an erroneous speed signal is input.

CAUTION:

Even when there is no malfunction on speed signal system, malfunction may be misin-
terpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 seconds).

MWI-30

August 2012

2012 Pathfinder