Infiniti FX35 / FX45. Manual - part 603

IGNITION SIGNAL

EC-1173

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

OK

>> INSPECTION END

NG

>> GO TO 10.

4.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1.

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

2.

Check voltage between ECM terminals 119, 120 and ground
with CONSULT-III or tester.

OK or NG

OK

>> GO TO 5.

NG

>> Go to 

EC-718

.

5.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect condenser (1) harness connector.

-

Vehicle front

3.

Turn ignition switch ON.

4.

Check voltage between condenser terminal 1 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 6.

6.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E7.

3.

Check harness continuity between IPDM E/R terminal 17 and condenser terminal 1.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> Go to 

EC-718

.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E19, F49

Voltage: Battery voltage

MBIB0034E

PBIB3233E

Voltage: Battery voltage

PBIB0624E

Continuity should exist.

EC-1174

< SERVICE INFORMATION >

[VK45DE]

IGNITION SIGNAL

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

>> 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-1175, "Component Inspection"

OK or NG

OK

>> GO TO 10.

NG

>> Replace condenser.

10.

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 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 connector F49
• Harness for open or short between ignition coil and harness connector F49

Continuity should exist.

: Vehicle front

1.

Ignition coil
(With power transistor)
(Bank 2)

2.

Ignition coil
(With power transistor)
(Bank 1)

Voltage: Battery voltage

PBIB3234E

PBIB0138E

IGNITION SIGNAL

EC-1175

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

>> 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.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 13.

NG

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

13.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminals 46, 60, 61, 62, 65, 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 14.

NG

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

14.

CHECK IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EC-1175, "Component Inspection"

.

OK or NG

OK

>> GO TO 15.

NG

>> Replace ignition coil with power transistor.

15.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

Component Inspection

INFOID:0000000001327071

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.

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.

Continuity should exist.

Continuity should exist.

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

EC-1176

< SERVICE INFORMATION >

[VK45DE]

IGNITION SIGNAL

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 all ignition coil harness connectors to avoid the electri-

cal discharge from the ignition coils.

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

checked.

13. Crank engine for five 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 three seconds, and check whether spark

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

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, the spark might be generated even if the coil is malfunctioning.

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.

Removal and Installation

INFOID:0000000001327072

IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EM-187

.

Spark should be generated.

PBIB1482E

PBIB2325E

Resistance: Above 1 M

Ω

 [at 25

°

C (77

°

F)]

PBIB0794E