Nissan Frontier. Manual - part 1022

MWI-32

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

BCM (BODY CONTROL MODULE) : Diagnosis Procedure

INFOID:0000000010217857

Regarding Wiring Diagram information, refer to 

BCS-43, "Wiring Diagram"

.

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and 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 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

21 (10A)

70

G (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

1 (10A)

Connector

Terminals 

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC 

power 

supply

Ignition 

switch 

ACC or 

ON

Battery voltage

38

Ground

Ignition 

power 

supply

Ignition 

switch ON 

or START

Battery voltage

M20

57

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

70

Ground

Battery 

power 

supply

Ignition 

switch 

OFF

Battery voltage

LIIA2415E

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

LIIA0915E

MWI

POWER SUPPLY AND GROUND CIRCUIT

MWI-33

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

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

INFOID:0000000010217858

Regarding Wiring Diagram information, refer to 

PCS-22, "Wiring Diagram"

.

1.

 CHECK FUSIBLE LINKS

Check that the following IPDM E/R fusible links are not blown.

Is the fusible link blown?

YES

>> Replace the blown 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 there voltage on all pins?

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

Fusible link No.

1

Battery

A, D

2

C

22

A, E, I

Terminals

Ignition 

switch posi-

tion

Voltage (V)

(Approx.)

(+)

(

−)

Connector

Terminal

E118 (A)

1

Ground

OFF

Battery
voltage

2

E120 (B)

22

AWMIA0506ZZ

IPDM E/R

Ground

Continuity

Connector

Terminal

E122 (A)

38

Yes

E124 (B)

59

AWMIA0024ZZ

MWI-34

< DTC/CIRCUIT DIAGNOSIS >

FUEL LEVEL SENSOR SIGNAL CIRCUIT

FUEL LEVEL SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000009480364

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:0000000009480365

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-90, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000009480366

Regarding Wiring Diagram information, refer to 

MWI-65, "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

MWI

FUEL LEVEL SENSOR SIGNAL CIRCUIT

MWI-35

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

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:0000000009480367

1.

REMOVE FUEL LEVEL SENSOR UNIT

Remove the fuel level sensor unit. Refer to 

FL-10, "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