Nissan Qashqai J11. Manual - part 352

 

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Nissan Qashqai J11. Manual - part 352

 

 

IGNITION SIGNAL

ECM-385

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

IGNITION SIGNAL

Component Function Check

INFOID:0000000010703070

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

>> Proceed to 

ECM-385, "Diagnosis Procedure"

.

2.

CHECK IGNITION SIGNAL FUNCTION-1

With CONSULT

1.

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

2.

Check that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

ECM-385, "Diagnosis Procedure"

.

3.

CHECK IGNITION SIGNAL FUNCTION-2

Without CONSULT

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

>> Proceed to 

ECM-385, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010703071

1.

CHECK CONDENSER POWER SUPPLY

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?

ECM

Voltage signal

+

Connector

Terminal

Connector

Terminal

F16

78

E57

128

82

86

90

JPBIA4733ZZ

+

Voltage

Condenser

Connector

Terminal

F200

1

Ground

Battery voltage

ECM-386

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

IGNITION SIGNAL

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK CONDENSER POWER SUPPLY CIRCUIT

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 to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

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 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK CONDENSER

Check condenser. Refer to 

ECM-190, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace condenser.

5.

CHECK IGNITION COIL POWER SUPPLY

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 6.

NO

>> Repair or replace malfunctioning part.

+

Continuity

IPDM E/R

Condenser

Connector

Terminal

Connector

Terminal

F90

96

F200

1

Existed

+

Continuity

Condenser

Connector

Terminal

F200

2

Ground

Existed

+

Voltage

Ignition coil

Cylinder

Connector

Terminal

1

F24

3

Ground

Battery voltage

2

F25

3

3

F26

3

4

F27

3

IGNITION SIGNAL

ECM-387

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

6.

CHECK IGNITION COIL GROUND CIRCUIT

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 7.

NO

>> Repair or replace malfunctioning part.

7.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT

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 to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace malfunctioning part.

8.

CHECK IGNITION COIL WITH POWER TRANSISTOR

Check ignition coil with power transistor. Refer to 

ECM-387, "Component Inspection (Ignition Coil With Power

Transistor)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

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

EM-170, "Exploded View"

.

Component Inspection (Ignition Coil With Power Transistor)

INFOID:0000000010703072

1.

CHECK IGNITION COIL WITH POWER TRANSISTOR-1

1.

Turn ignition switch OFF.

2.

Disconnect ignition coil harness connector.

3.

Check resistance between ignition coil terminals as per the following.

+

Continuity

Ignition coil

Cylinder

Connector

Terminal

1

F24

2

Ground

Existed

2

F25

2

3

F26

2

4

F27

2

+

Continuity

Ignition coil

ECM

Cylinder

Connector

Terminal

Connector

Terminal

1

F24

1

F16

78

Existed

2

F25

1

82

3

F26

1

86

4

F27

1

90

ECM-388

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

IGNITION SIGNAL

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

EM-170, "Exploded View"

.

2.

CHECK IGNITION COIL WITH POWER TRANSISTOR-2

CAUTION:

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

Reconnect all harness connectors disconnected.

2.

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.

3.

Start engine.

4.

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

5.

Turn ignition switch OFF.

6.

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

7.

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

EM-170, "Exploded View"

.

8.

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

9.

Connect spark plug and harness connector to ignition coil.

10. 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.

11. 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
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 malfunctioning.

Is the inspection result normal?

YES

>> INSPECTION END

NO

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

EM-170, "Exploded View"

.

Component Inspection (Condenser)

INFOID:0000000010703073

1.

CHECK CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals as per the following.

Ignition coil

Resistance 

 [at 25

°

C (77

°

F)]

+

Terminal

1

2

Except 0 or 

 

3

Except 0 

2

3

Spark should be generated.

JMBIA0066GB

 

 

 

 

 

 

 

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