Nissan Cube. Manual - part 381

EC-410

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

FUEL PUMP

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E13.

3.

Turn ignition switch ON.

4.

Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness or connectors E8, F1
• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect “fuel level sensor unit and fuel pump” harness connector.

4.

Turn ignition switch ON.

5.

Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 5.

5.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Disconnect 15 A fuse (No. 60) from IPDM E/R.

3.

Check 15 A fuse.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace15 A fuse.

6.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV

1.

Disconnect IPDM E/R harness connector E15.

2.

Check the continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel pump”
harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 7.

IPDM E/R

Ground

Voltage

Connector

Terminal

E13

31

Ground

Battery voltage

Fuel level sensor unit and fuel pump

Ground

Voltage

Connector

Terminal

B40

1

Ground

Battery voltage should exist 1 sec-
ond after ignition switch is turn ON.

IPDM E/R

Fuel level sensor unit and fuel pump

Continuity

Connector

Terminal

Connector

Terminal

E15

55

B40

1

Existed

FUEL PUMP

EC-411

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

C

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7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B1, M18
• Harness connectors M77, E105
• Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump” 

>> Repair open circuit or short to power in harness or connectors.

8.

CHECK FUEL PUMP GROUND CIRCUIT

1.

Check the continuity between “fuel level sensor unit and fuel pump” and ground. 

2.

Also heck harness for short to power. 

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair open circuit or short to power in harness or connectors.

9.

CHECK FUEL PUMP

Refer to 

EC-411, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

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

FL-5, "Exploded View"

.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

 (With I-KEY) or 

PCS-64,

"Removal and Installation"

 (Without I-KEY).

NO

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000009947558

1.

CHECK FUEL PUMP

1.

Turn ignition switch OFF.

2.

Disconnect “fuel level sensor unit and fuel pump” harness connector.

3.

Check resistance between “fuel level sensor unit and fuel pump” terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

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

FL-5, "Exploded View"

.

Fuel level sensor unit and fuel pump

Ground

Continuity

Connector

Terminal

B40

3

Ground

Existed

Terminals

Resistance

1 and 3

0.2 - 5.0 

Ω

 [at 25

°

C (77

°

F)]

EC-412

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

IGNITION SIGNAL

IGNITION SIGNAL

Description

INFOID:0000000009947559

The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.

Component Function Check

INFOID:0000000009947560

1.

INSPECTION START

Turn ignition switch OFF, and restart engine.

Does the engine start?

YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO

>> Go to 

EC-412, "Diagnosis Procedure"

.

2.

IGNITION SIGNAL FUNCTION

With CONSULT

1.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.

2.

Make sure that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-412, "Diagnosis Procedure"

.

3.

IGNITION SIGNAL FUNCTION

 Without CONSULT

1.

Let engine idle.

2.

Read the voltage signal between ECM harness connector and ground.

NOTE:
The pulse cycle changes depending on rpm at idle.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-412, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009947561

1.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

2.

Check the voltage between ECM harness connector and ground.

ECM

Ground

Voltage signal

Connector

Terminal

F7

17

Ground

18

21

22

PBIA9265J

ECM

Ground

Voltage

Connector

Terminal

E16

105

Ground

Battery voltage

IGNITION SIGNAL

EC-413

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

C

D

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F

G

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EC

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Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

EC-129, "Diagnosis Procedure"

.

2.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect Condenser harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between condenser harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 3.

3.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E43.

3.

Check the continuity between IPDM E/R harness connector and condenser harness connector.

4.

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

Is the inspection result normal?

YES

>> Go to 

EC-129, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F1
• IPDM E/R harness connector E43
• Harness for open or short between IPDM E/R and condenser

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between Condenser harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

6.

CHECK CONDENSER

Refer to 

EC-416, "Component Inspection (Condenser)"

.

Is the inspection result normal?

YES

>> GO TO 7.

Condenser

Ground

Voltage

Connector

Terminal

F13

1

Ground

Battery voltage

IPDM E/R

Condenser

Continuity

Connector

Terminal

Connector

Terminal

E14

44

F13

1

Existed

Condenser

Ground

Continuity

Connector

Terminal

F13

2

Ground

Existed