Infiniti M35/M45 Y50. Manual - part 402

BASIC SERVICE PROCEDURE

EC-81

[VQ35DE]

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10. 

CHECK IGNITION TIMING

1.

Run engine at idle.

2.

Check ignition timing with a timing light.
Refer to 

EC-83, "IGNITION TIMING"

 .

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 11.

11. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform 

EC-86, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 12.

12. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-86, "Throttle Valve Closed Position Learning"

 .

>> GO TO 13.

13. 

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-86, "Idle Air Volume Learning"

 .

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 14.

No

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

15 

±

 5

°

 BTDC (in P or N position)

PBIB1602E

EC-82

[VQ35DE]

BASIC SERVICE PROCEDURE

14. 

CHECK TARGET IDLE SPEED AGAIN

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to 

EC-83, "IDLE SPEED"

 .

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed.
Refer to 

EC-83, "IDLE SPEED"

 .

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

15. 

CHECK IGNITION TIMING AGAIN

1.

Run engine at idle.

2.

Check ignition timing with a timing light.
Refer to 

EC-83, "IGNITION TIMING"

 .

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 16.

16. 

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to 

EM-66, "TIMING CHAIN"

 .

OK or NG

OK

>> GO TO 17.

NG

>> 1. Repair the timing chain installation.

2. GO TO 4.

650 

±

 50 rpm (in P or N position)

SEF174Y

650 

±

 50 rpm (in P or N position)

15 

±

 5

°

 BTDC (in P or N position)

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BASIC SERVICE PROCEDURE

EC-83

[VQ35DE]

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17. 

DETECT MALFUNCTIONING PART

Check the following.

●

Check camshaft position sensor (PHASE) and circuit. Refer to 

EC-371, "DTC P0340, P0345 CMP SEN-

SOR (PHASE)"

 .

●

Check crankshaft position sensor (POS) and circuit. Refer to 

EC-364, "DTC P0335 CKP SENSOR (POS)"

.

OK or NG

OK

>> GO TO 18.

NG

>> 1. Repair or replace.

2. GO TO 4.

18. 

CHECK ECM FUNCTION 

1.

Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)

2.

Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to

BL-248, "ECM Re-Communicating Function"

 .

>> GO TO 4.

19. 

INSPECTION END

Did you replace ECM, referring this Basic Inspection procedure?

Yes or No

Yes

>> 1. Perform 

EC-85, "VIN Registration"

 .

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

NBS004SR

IDLE SPEED

With CONSULT-II

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

With GST

Check idle speed with Service $01 GST.

IGNITION TIMING

Any of following two methods may be used.

SEF058Y

EC-84

[VQ35DE]

BASIC SERVICE PROCEDURE

Method A

1.

Attach timing light to loop wire as shown.

2.

Check ignition timing.

Method B

1.

Remove No. 1 ignition coil.

2.

Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to this
wire.

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