Infiniti M45 (Y34). Manual - part 336

BASIC SERVICE PROCEDURE

EC-33

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EC

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.

3.

Check ignition timing.

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

ABS002DA

PREPARATION

1.

Make sure that the following parts are in good order.

–

Battery

–

Ignition system

–

Engine oil and coolant levels

–

Fuses

–

ECM harness connector

–

Vacuum hoses

–

Air intake system
(Oil filler cap, oil level gauge, etc.)

–

Fuel pressure

–

Engine compression

–

Throttle valve

–

Evaporative emission system

2.

On air conditioner equipped models, checks should be carried out while the air conditioner is OFF.

3.

On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio,
checks should be carried out while selector lever is in P or N position.

4.

When measuring CO percentage, insert probe more than 40 cm (15.7 in) into tail pipe.

PBIB0140E

SEF166Y

PBIB1117E

EC-34

BASIC SERVICE PROCEDURE

5.

Turn off headlamp, heater blower, rear window defogger.

6.

Keep front wheels pointed straight ahead.

OVERALL INSPECTION SEQUENCE

PBIB2001E

BASIC SERVICE PROCEDURE

EC-35

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INSPECTION PROCEDURE

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-36

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.

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.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 4.

4. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform 

EC-44, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 5.

5. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-44, "Throttle Valve Closed Position Learning"

 .

>> GO TO 6.

SEF978U

650 

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 50 rpm (in P or N position)

SEF058Y

650 

±

 50 rpm (in P or N position)