Infiniti Q45. Manual - part 358

BASIC SERVICE PROCEDURE

EC-71

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BASIC SERVICE PROCEDURE

PFP:00018

Basic Inspection

NBS001QR

1. 

INSPECTION START

1.

Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.

2.

Open engine hood and check the following:

–

Harness connectors for improper connections

–

Wiring harness for improper connections, pinches and cut

–

Vacuum hoses for splits, kinks and improper connections

–

Hoses and ducts for leaks

–

Air cleaner clogging

–

Gasket

3.

Confirm that electrical or mechanical loads are not applied.

–

Headlamp switch is OFF.

–

Air conditioner switch is OFF.

–

Rear window defogger switch is OFF.

–

Steering wheel is in the straight-ahead position, etc.

4.

Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.

5.

Run engine at about 2,000 rpm for about 2 minutes under no
load.

6.

Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3

SEF983U

SEF976U

SEF977U

EC-72

BASIC SERVICE PROCEDURE

3. 

CHECK TARGET IDLE SPEED

 With CONSULT-II

1.

Run engine at about 2,000 rpm for about 2 minutes under no load.

2.

Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.

3.

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

EC-76

 .

 Without CONSULT-II

1.

Run engine at about 2,000 rpm for about 2 minutes under no load.

2.

Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about
1 minute.

3.

Check idle speed. Refer to 

EC-76

 .

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 4.

4. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform 

EC-77, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 5.

5. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

>> GO TO 6.

PBIA8513J

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 50 rpm (in P or N position)

SEF058Y

650 

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 50 rpm (in P or N position)

BASIC SERVICE PROCEDURE

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6. 

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-78, "Idle Air Volume Learning"

 .

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 7.

No

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

2. GO TO 4.

7. 

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-76

 .

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed. Refer to 

EC-76

 .

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the Following.

●

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

EC-379

 .

●

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

EC-370

 .

OK or NG

OK

>> GO TO 9.

NG

>> 1. Repair or replace.

2. GO TO 4.

9. 

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-202, "ECM Re-Communicating Function"

 .

>> GO TO 4.

650 

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 50 rpm (in P or N position)

650 

±

 50 rpm (in P or N position)

SEF174Y

EC-74

BASIC SERVICE PROCEDURE

10. 

CHECK IGNITION TIMING

1.

Run engine at idle.

2.

Check ignition timing with a timing light. Refer to 

EC-76

 .

OK or NG

OK

>> GO TO 19.

NG

>> GO TO 11.

11. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform 

EC-77, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 12.

12. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

>> GO TO 13.

13. 

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-78, "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.

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-76

 .

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed. Refer to 

EC-76

 .

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

12 

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 5

°

 BTDC (in P or N position)

PBIB2435E

650 

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 50 rpm (in P or N position)

650 

±

 50 rpm (in P or N position)

SEF174Y