Infiniti M45 (Y34). Manual - part 492

 

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Infiniti M45 (Y34). Manual - part 492

 

 

IGNITION SIGNAL

EC-657

C

D

E

F

G

H

I

J

K

L

M

A

EC

6. 

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect ECM relay.

4.

Check harness continuity between ECM terminal 12 and ECM
relay terminal 3.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M135, F105

Fuse block (J/B) No. 2 harness connector M143

Harness for open or short between ECM and ECM relay

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

8. 

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV

Check voltage between ECM relay terminal 5 and ground with CON-
SULT-II or tester.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9. 

DETECT MALFUNCTIONING PART

Check the following.

20A fuse

Fuse, fusible link and relay block (J/B) harness connector E3

Fuse block (J/B) No. 2 harness connector E215

Harness for open and short between ECM relay and fuse

>> Repair or replace harness or connectors.

10. 

CHECK ECM RELAY

Refer to 

EC-142, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> Replace ECM relay.

Continuity should exist.

PBIB0040E

Voltage: Battery voltage

PBIB2078E

EC-658

IGNITION SIGNAL

11. 

CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check harness continuity between the following;
ECM terminal 12 and condenser terminal 1, 
condenser terminal 2 and ground.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 12.

NG

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

12. 

CHECK CONDENSER

Refer to 

EC-659, "Component Inspection"

OK or NG

OK

>> GO TO 13.

NG

>> Replace condenser.

13. 

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-II or tester.

OK or NG

OK

>> GO TO 14.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Continuity should exist.

Voltage: Battery voltage

PBIB1116E

PBIB0138E

IGNITION SIGNAL

EC-659

C

D

E

F

G

H

I

J

K

L

M

A

EC

14. 

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 15.

NG

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

15. 

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminals 18, 19, 20, 21, 29, 30, 31, 32 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

>> 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-659, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> Replace ignition coil with power transistor.

17. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

ABS002TO

IGNITION COIL WITH POWER TRANSISTOR

1.

Turn ignition switch OFF.

2.

Disconnect ignition coil harness connector.

3.

Check resistance between ignition coil terminals as follows.

Continuity should exist.

Continuity should exist.

Terminal No. (Polarity)

Resistance 

 [at 25

°

C (77

°

F)]

1 and 2

Except 0 or 

1 and 3

Except 0

2 and 3

PBIB0847E

EC-660

IGNITION SIGNAL

CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals 1 and 2.

Removal and Installation

ABS002TP

IGNITION COIL WITH POWER TRANSISTOR

Refer to 

EM-28, "IGNITION COIL"

 .

Resistance: Above 1 M

 [at 25

°

C (77

°

F)]

PBIB0794E

 

 

 

 

 

 

 

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