Nissan Altima L32. Instruction — part 593

IGNITION SIGNAL

EC-1493

< COMPONENT DIAGNOSIS >

[VQ35DE]

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Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace condenser.

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.

Ignition coil

Ground

Voltage

Cylinder

Connector

Terminal

1

F34

3

Ground

Battery voltage

2

F35

3

3

F36

3

4

F37

3

5

F38

3

6

F39

3

PBIB0138E

Ignition coil

Ground

Continuity

Cylinder

Connector

Terminal

1

F34

2

Ground

Existed

2

F35

2

3

F36

2

4

F37

2

5

F38

2

6

F39

2

EC-1494

< COMPONENT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

3. Also check harness for short to ground and short to power.
Is the inspection result normal?

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-1494, "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-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Ignition Coil with Power Transistor)

INFOID:0000000004362374

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 fol-

lowing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning ignition coil with power transis-

tor.

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.

Ignition coil

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F34

1

F14

11

Existed

2

F35

1

10

3

F36

1

9

4

F37

1

21

5

F38

1

19

6

F39

1

18

Terminal No. (Polarity)

Resistance

Ω [at 25°C (77°F)]

1 and 2

Except 0 or

∞

1 and 3

Except 0

2 and 3

PBIB0847E

IGNITION SIGNAL

EC-1495

< COMPONENT DIAGNOSIS >

[VQ35DE]

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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:

• Never place the spark plug and the ignition coil within 50

cm (19.7 in) each other. Be careful not to get an electrical

shock while checking, because the electrical discharge

voltage becomes 20 kV or more.

• It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.

NOTE:

When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunc-

tioning.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning ignition coil with power transistor.

Component Inspection (Condenser)

INFOID:0000000004362375

1.

CHECK CONDENSER

1. Turn ignition switch OFF.

2. Disconnect condenser harness connector.

3. Check resistance between condenser terminals as per the fol-

lowing.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Spark should be generated.

JMBIA0066GB

Terminals

Resistance

1 and 2

Above 1 M

Ω [at 25C° (77C°)]

PBIB0794E

EC-1496

< COMPONENT DIAGNOSIS >

[VQ35DE]

MALFUNCTION INDICATOR LAMP

MALFUNCTION INDICATOR LAMP

Description

INFOID:0000000004362376

The Malfunction Indicator Lamp (MIL) is located on the combination

meter.

The MIL will illuminate when the ignition switch is turned ON without

the engine running. This is a bulb check.

When the engine is started, the MIL should turn off. If the MIL

remains illuminated, the on board diagnostic system has detected an

engine system malfunction.

For details, refer to

EC-1142, "Diagnosis Description"

.

Component Function Check

INFOID:0000000004362377

1.

CHECK MIL FUNCTION

1. Turn ignition switch ON.

2. Check that MIL illuminates.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to

EC-1496, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004362378

1.

CHECK DTC

Check that DTC UXXXX is not displayed.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX. Refer to

EC-1179, "Description"

.

2.

CHECK COMBINATION METER FUNCTION

Refer to

MWI-95, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace.

3.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace.

SEF217U