Nissan Murano. Manual - part 586

EC-454

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refer to 

EC-148, "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-148, "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-457, "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

IGNITION SIGNAL

EC-455

< DTC/CIRCUIT 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

EC-456

< DTC/CIRCUIT 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-456, "Component Inspection (Ignition Coil with Power Transistor)"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace malfunctioning ignition coil with power transistor. Refer to 

EM-54, "Exploded View"

.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-44, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Ignition Coil with Power Transistor)

INFOID:0000000009720223

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. Refer to 

EM-54, "Exploded View"

.

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 to release fuel pressure, or fuel pressure applies again during the following proce-
dure.

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 

Ω

 [at 25

°

C (77

°

F)]

1 and 2

Except 0 or 

∞

1 and 3

Except 0

2 and 3

Spark should be generated.

JMBIA0066GB

IGNITION SIGNAL

EC-457

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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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. Refer to 

EM-54, "Exploded View"

.

Component Inspection (Condenser)

INFOID:0000000009720224

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

Ω

 [at 25C

°

 (77C

°

)]