Nissan Murano Z51 (2008 year). Manual - part 164

 

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Nissan Murano Z51 (2008 year). Manual - part 164

 

 

EC-440

< COMPONENT DIAGNOSIS >

[VQ35DE]

ELECTRICAL LOAD SIGNAL

>> INSPECTION END

3.

CHECK HEADLAMP SYSTEM

Refer to 

EXL-6, "Work Flow"

 (XENON TYPE) or 

EXL-189, "Work Flow"

 (HALOGEN TYPE).

>> INSPECTION END

4.

CHECK HEATER FAN CONTROL SYSTEM

Refer to 

VTL-5, "System Description"

.

>> INSPECTION END

Revision: 2008 October

2009 Murano

ELECTRONIC CONTROLLED ENGINE MOUNT

EC-441

< COMPONENT DIAGNOSIS >

[VQ35DE]

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ELECTRONIC CONTROLLED ENGINE MOUNT

Description

INFOID:0000000003388252

The electronic controlled engine mount control solenoid valve controls the intake manifold vacuum signal for
electronic controlled engine mount. The electronic controlled engine mount control solenoid valve is moved by
ON/OFF signal from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut.
When the solenoid is ON, the intake manifold vacuum signal is sent to the electronic controlled engine mount. 

Component Function Check

INFOID:0000000003388253

1.

CHECK OVERALL FUNCTION

1.

Start engine and warm it up to normal operating temperature.

2.

Shift selector position is D while depressing the brake pedal and parking brake pedal.

3.

Disconnect electronic controlled engine mount control solenoid valve harness connector.

4.

Check that body vibration increases compared to the condition of step 2 above (with vehicle stopped).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>>

EC-441, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388254

1.

CHECK VACUUM SOURCE

1.

Turn ignition switch OFF.

2.

Reconnect electronic controlled engine mount control solenoid valve harness connector.

3.

Disconnect vacuum hose connected to electronic controlled engine mount.

4.

Start engine and let it idle.

5.

Check vacuum hose for vacuum existence.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK VACUUM HOSES AND VACUUM GALLERY

1.

Turn ignition switch OFF.

2.

Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection. Refer to 

EC-68,

"System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace vacuum hoses and vacuum gallery.

3.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY

CIRCUIT

1.

Disconnect electronic controlled engine mount control solenoid valve harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between front electronic controlled engine mount harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Vacuum should exist.

Electronic controlled engine mount 

control solenoid valve

Ground

Voltage

Connector

Terminal

F11

1

Ground

Battery voltage

Revision: 2008 October

2009 Murano

EC-442

< COMPONENT DIAGNOSIS >

[VQ35DE]

ELECTRONIC CONTROLLED ENGINE MOUNT

Check the following.
• Harness connectors E6, F123
• 10 A fuse (No. 3)
• Fuse block (J/B) connector E103
• Harness for open or short between electronic controlled engine mount control solenoid valve and fuse

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

5.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE OUTPUT SIG-

NAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between ECM harness connector and electronic controlled engine mount control
solenoid valve harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE

Refer to 

EC-442, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace electronic controlled engine mount control solenoid valve.

7.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

1.

Turn ignition switch OFF.

2.

Install vacuum pump (A) to electronic controlled engine mount
(1).

3.

Check that a vacuum is maintained when applying the vacuum
of -40 kPa (-0.41 kg/cm

2

, -5.8 psi) to electronic controlled engine

mount.

4.

Also visually check electronic controlled engine mount.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace electronic controlled engine mount.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace intake manifold collector.

NO

>> Repair or replace malfunctioning part.

Component Inspection

INFOID:0000000003388255

1.

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE

 With CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect electronic controlled engine mount control solenoid valve harness connector.

3.

Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.

4.

Turn ignition switch ON.

ECM

Electronic controlled engine 

mount control solenoid valve

Continuity

Connector

Terminal

Connector

Terminal

F7

28

F11

2

Existed

MBIB1237E

Revision: 2008 October

2009 Murano

ELECTRONIC CONTROLLED ENGINE MOUNT

EC-443

< COMPONENT DIAGNOSIS >

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5.

Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT-III.

6.

Check air passage continuity and operation delay time under the
following conditions.

 Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Disconnect electronic controlled engine mount control solenoid
valve harness connector.

3.

Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.

4.

Check air passage continuity and operation delay time under the
following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electronic controlled engine mount control sole-

noid valve.

Condition

(ENGINE MOUNTING)

Air passage continuity 

between (A) and (B)

Air passage continuity 

between (A) and (C)

TRVL

Existed

Not existed

IDLE

Not existed

Existed

Condition

Air passage continuity 

between (A) and (B)

Air passage continuity 

between (A) and (C)

12 V direct current supply be-
tween terminals 1 and 2

Existed

Not existed

No supply

Not existed

Existed

JMBIA0180ZZ

PBIB2532E

Revision: 2008 October

2009 Murano

EC-444

< COMPONENT DIAGNOSIS >

[VQ35DE]

FUEL INJECTOR

FUEL INJECTOR

Description

INFOID:0000000003388256

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.

Component Function Check

INFOID:0000000003388257

1.

INSPECTION START

Turn ignition switch to START.
Are any cylinders ignited?

YES

>> GO TO 2.

NO

>> Go to 

EC-444, "Diagnosis Procedure"

.

2.

CHECK FUEL INJECTOR FUNCTION

With CONSULT-III

1.

Start engine.

2.

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

3.

Check that each circuit produces a momentary engine speed drop.

Without CONSULT-III

1.

Start engine.

2.

Listen to each fuel injector operating sound.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-444, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388258

1.

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between fuel injector harness connector and ground.

PBIA9664J

Clicking sound should be heard.

PBIB3332E

Revision: 2008 October

2009 Murano

FUEL INJECTOR

EC-445

< COMPONENT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• 10 A fuse (No.44)
• IPDM E/R harness connector F12
• Harness for open or short between fuel injector and IPDM E/R

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

3.

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between fuel injector harness connector and ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK FUEL INJECTOR

Refer to 

EC-446, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning fuel injector.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> INSPECTION END

Fuel injector

Ground

Voltage

Cylinder

Connector

Terminal

1

F37

1

Ground

Battery voltage

2

F38

1

3

F39

1

4

F40

1

5

F41

1

6

F42

1

Fuel injector

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F37

2

F7

32

Existed

2

F38

2

31

3

F39

2

30

4

F40

2

29

5

F41

2

3

6

F42

2

1

Revision: 2008 October

2009 Murano

EC-446

< COMPONENT DIAGNOSIS >

[VQ35DE]

FUEL INJECTOR

Component Inspection

INFOID:0000000003388259

1.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Check resistance between fuel injector terminals as per the fol-
lowing.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning fuel injector.

Terminals

Resistance

1 and 2

11.1 - 14.5 

 [at 10 - 60

°

C (50 - 140

°

F)]

PBIB1727E

Revision: 2008 October

2009 Murano

FUEL PUMP

EC-447

< COMPONENT DIAGNOSIS >

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FUEL PUMP

Description

INFOID:0000000003388260

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
start ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

Component Function Check

INFOID:0000000003388261

1.

CHECK FUEL PUMP FUNCTION

1.

Turn ignition switch ON.

2.

Pinch fuel feed hose with two fingers.

-

: Vehicle front (Illustration shows the view with intake air duct

removed)

Is the inspection result normal?

YES

>> INSPECTION END

NO

>>

EC-447, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388262

1.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

Sensor

Input signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

Fuel pump

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 1 second.

Engine running and cranking

Operates.

When engine is stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

Fuel pressure pulsation should be felt on the fuel feed 
hose for 1 second after ignition switch is turned ON.

JMBIA1131ZZ

ECM

Voltage

+

Connector

Terminal

Connector

Terminal

F7

14

E16

112

Battery voltage

Revision: 2008 October

2009 Murano

EC-448

< COMPONENT DIAGNOSIS >

[VQ35DE]

FUEL PUMP

2.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 16.

3.

DETECT MALFUNCTIONING PART

Check the following.
• IPDM E/R harness connector F12
• Harness for open or short between IPDM E/R and ECM

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

4.

CHECK CONDENSER POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect condenser harness connector.

4.

Turn ignition switch ON.

5.

Check the voltage between condenser harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 5.

5.

CHECK 15 A FUSE

1.

Turn ignition switch OFF.

2.

Disconnect 15 A fuse (No. 41).

3.

Check 15 A fuse.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace fuse.

6.

CHECK CONDENSER POWER SUPPLY CIRCUIT-II

1.

Disconnect IPDM E/R harness connector.

2.

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

3.

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

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

IPDM E/R

Ground

Voltage

Connector

Terminal

F12

77

Ground

Battery voltage

Condenser

Ground

Voltage

Connector

Terminal

B81

1

Ground

Battery voltage should exist for 1 second 
after ignition switch is turned ON.

IPDM E/R

Condenser

Continuity

Connector

Terminal

Connector

Terminal

E10

13

B81

1

Existed

Revision: 2008 October

2009 Murano

FUEL PUMP

EC-449

< COMPONENT DIAGNOSIS >

[VQ35DE]

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Check the following.
• Harness connectors E104, B4
• IPDM E/R connector E10
• Harness for open or short between IPDM E/R and condenser

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

8.

CHECK CONDENSER GROUND CIRCUIT

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 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B4, E104 (with rear view monitor)
• Harness for open or short between condenser and ground

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

10.

CHECK CONDENSER

Refer to 

EC-450, "Component Inspection (Condenser)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace condenser.

11.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III

1.

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

2.

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

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 12.

12.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B4, E104
• Harness for open or short between “fuel level sensor unit and fuel pump” and IPDM E/R

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

13.

CHECK FUEL PUMP GROUND CIRCUIT

1.

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

2.

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

Condenser

Ground

Continuity

Connector

Terminal

B81

2

Ground

Existed

IPDM E/R

Fuel level sensor unit and fuel 

pump

Continuity

Connector

Terminal

Connector

Terminal

E10

13

B40

1

Existed

Revision: 2008 October

2009 Murano

EC-450

< COMPONENT DIAGNOSIS >

[VQ35DE]

FUEL PUMP

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> GO TO 14.

14.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B4, E104 (with rear view monitor)
• Harness for open or short between “fuel level sensor unit and fuel pump” and ground

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

15.

CHECK FUEL PUMP

Refer to 

EC-450, "Component Inspection (Fuel Pump)"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace fuel pump.

16.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.

Component Inspection (Fuel Pump)

INFOID:0000000003388263

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”

Component Inspection (Condenser)

INFOID:0000000003388264

1.

CHECK CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Fuel level sensor unit and fuel 

pump

Ground

Continuity

Connector

Terminal

B40

3

Ground

Existed

Terminals

Resistance

1 and 3

0.2 - 5.0 

 [at 25

°

C (77

°

F)]

Terminals

Resistance

1 and 2

Above 1 M

 [at 25

°

C (77

°

F)]

Revision: 2008 October

2009 Murano

IGNITION SIGNAL

EC-451

< COMPONENT DIAGNOSIS >

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IGNITION SIGNAL

Description

INFOID:0000000003388265

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:0000000003388266

1.

INSPECTION START

Turn ignition switch OFF, and restart engine.

Does the engine start?

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

>> Go to 

EC-451, "Diagnosis Procedure"

.

2.

CHECK IGNITION SIGNAL FUNCTION

With CONSULT-III

1.

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

2.

Check that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-451, "Diagnosis Procedure"

.

3.

CHECK IGNITION SIGNAL FUNCTION

 Without CONSULT-III

1.

Let engine idle.

2.

Read the voltage signal between ECM harness connector terminals with an oscilloscope.

NOTE:

The pulse cycle changes depending on rpm at idle.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-451, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388267

1.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1.

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

2.

Check the voltage between ECM harness connector terminals.

ECM

Voltage signal

+

Connector

Terminal

Connector

Terminal

F7

9

E16

112

10

11

18

19

21

JMBIA0035GB

Revision: 2008 October

2009 Murano

EC-452

< COMPONENT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refer to 

EC-135, "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 4.

NO

>> GO TO 3.

3.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

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

>> Refer to 

EC-135, "Diagnosis Procedure"

.

NO

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

4.

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 5.

NO

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

5.

CHECK CONDENSER

Refer to 

EC-455, "Component Inspection (Condenser)"

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace condenser.

ECM

Voltage

Connector

+

Terminal

Terminal

E16

105

112

Battery voltage

Condenser

Ground

Voltage

Connector

Terminal

F13

1

Ground

Battery voltage

IPDM E/R

Condenser

Continuity

Connector

Terminal

Connector

Terminal

F12

49

F13

1

Existed

Condenser

Ground

Continuity

Connector

Terminal

F13

2

Ground

Existed

Revision: 2008 October

2009 Murano

IGNITION SIGNAL

EC-453

< COMPONENT DIAGNOSIS >

[VQ35DE]

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6.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V

1.

Reconnect all harness connectors disconnected.

2.

Disconnect ignition coil harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ignition coil harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace harness or connectors.

7.

CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between ignition coil harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

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

8.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between ignition coil harness connector and ECM harness connector.

3.

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

Is the inspection result normal?

Ignition coil

Ground

Voltage

Cylinder

Connector

Terminal

1

F31

3

Ground

Battery voltage

2

F32

3

3

F33

3

4

F34

3

5

F35

3

6

F36

3

Ignition coil

Ground

Continuity

Cylinder

Connector

Terminal

1

F31

2

Ground

Existed

2

F32

2

3

F33

2

4

F34

2

5

F35

2

6

F36

2

Ignition coil

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F31

1

F7

11

Existed

2

F32

1

10

3

F33

1

9

4

F34

1

21

5

F35

1

19

6

F36

1

18

Revision: 2008 October

2009 Murano

EC-454

< COMPONENT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

YES

>> GO TO 9.

NO

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

9.

CHECK IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EC-454, "Component Inspection (Ignition Coil with Power Transistor)"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace malfunctioning ignition coil with power transistor.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Ignition Coil with Power Transistor)

INFOID:0000000003388268

1.

CHECK IGNITION COIL WITH POWER TRANSISTOR-I

1.

Turn ignition switch OFF.

2.

Disconnect ignition coil harness connector.

3.

Check resistance between ignition coil terminals as per the following.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning ignition coil with power transistor.

2.

CHECK IGNITION COIL WITH POWER TRANSISTOR-II

CAUTION:

Perform the following procedure in a place with no combustible objects and good ventilation.
1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.

4.

Start engine.

5.

After engine stalls, crank it 2 or 3 times to release all fuel pressure.

6.

Turn ignition switch OFF.

7.

Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.

8.

Remove ignition coil and spark plug of the cylinder to be checked.

9.

Crank engine for 5 seconds or more to remove combustion gas in the cylinder.

10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -

0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.

12. Crank engine for approximately 3 seconds, and check whether

spark is generated between the spark plug and the grounded
metal portion.

CAUTION:

• During the operation, always stay 0.5 m (19.7 in) or more

away from the spark plug and the ignition coil. Be careful

Terminal No. (Polarity)

Resistance 

 [at 25

°

C (77

°

F)]

1 and 2

Except 0 or 

1 and 3

Except 0

2 and 3

Spark should be generated.

JMBIA0066GB

Revision: 2008 October

2009 Murano

IGNITION SIGNAL

EC-455

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

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EC

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not to get an electrical shock while checking, because the electrical discharge voltage becomes
20 kV or more.

• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning ignition coil with power transistor.

Component Inspection (Condenser)

INFOID:0000000003388269

1.

CHECK CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Terminals

Resistance

1 and 2

Above 1 M

 [at 25C

°

 (77C

°

)]

Revision: 2008 October

2009 Murano

 

 

 

 

 

 

 

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