Infiniti FX35 / FX45. Manual - part 454

IGNITION SIGNAL

EC-577

< SERVICE INFORMATION >

[VQ35DE]

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• Harness for open or short between condenser and IPDM E/R

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

8.

CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 9.

NG

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

9.

CHECK CONDENSER

Refer to 

EC-578, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace condenser.

10.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect ignition coil harness connector.

4.

Turn ignition switch ON.

5.

Check voltage between ignition coil terminal 3 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F10, F211
• Harness for open or short between ignition coil and harness connector F65

>> Repair or replace harness or connectors.

12.

CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between ignition coil terminal 2 and ground.

Continuity should exist.

Voltage: Battery voltage

PBIB1560E

PBIB0138E

EC-578

< SERVICE INFORMATION >

[VQ35DE]

IGNITION SIGNAL

Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 14.

NG

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F211, F10
• Harness for open or short between ignition coil and ground

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

14.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminals 60, 61, 62, 79, 80, 81 and ignition coil terminal 1.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 16.

NG

>> GO TO 15.

15.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F10, F211
• Harness for open or short between ignition coil and ECM

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

16.

CHECK IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EC-578, "Component Inspection"

.

OK or NG

OK

>> GO TO 17.

NG

>> Replace malfunctioning ignition coil with power transistor.

17.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

OK or NG

OK

>> Replace IPDM E/R. Refer to 

PG-17

NG

>> Repair or replace.

Component Inspection

INFOID:0000000001326458

IGNITION COIL WITH POWER TRANSISTOR

CAUTION:

Do the following procedure in the place where ventilation is good without the combustible.
1.

Turn ignition switch OFF.

2.

Disconnect ignition coil harness connector.

Continuity should exist.

Continuity should exist.

IGNITION SIGNAL

EC-579

< SERVICE INFORMATION >

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3.

Check resistance between ignition coil terminals as follows.

4.

If NG, Replace ignition coil with power transistor.
If OK, go to next step.

5.

Turn ignition switch OFF.

6.

Reconnect all harness connectors disconnected.

7.

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

8.

Start engine.

9.

After engine stalls, crank it two or three times to release all fuel
pressure.

10. Turn ignition switch OFF.
11. Remove ignition coil harness connectors to avoid the electrical

discharge from the ignition coils.

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

checked.

13. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
14. Connect spark plug and harness connector to ignition coil.
15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm

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

16. Crank engine for about 3 seconds, and check whether spark is

generated between the spark plug and the grounded part.

CAUTION:

• Do not approach to the spark plug and the ignition coil

within 50cm. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20kV or more.

• It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm or less, the spark might be generated even if the coil is malfunc-
tioning.

17. If NG, Replace ignition coil with power transistor.

CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals 1 and 2.

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.

PBIB0847E

PBIB1603E

PBIB2325E

Resistance: Above 1 M

Ω

 [at 25

°

C (77

°

F)]

PBIB0794E

EC-580

< SERVICE INFORMATION >

[VQ35DE]

IGNITION SIGNAL

Removal and Installation

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IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EM-42

.