Infiniti M45 (Y34). Manual - part 339

 

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Infiniti M45 (Y34). Manual - part 339

 

 

BASIC SERVICE PROCEDURE

EC-45

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On vehicles equipped with daytime light systems, if the parking brake is applied before the engine
is started the headlamp will not be illuminated.

Steering wheel: Neutral (Straight-ahead position)

Vehicle speed: Stopped

Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “ATF TEMP SE1” in “DATA MONITOR” mode of “A/T”
system indicates less than 0.9V.
For models without CONSULT-II, drive vehicle for 10 minutes.

OPERATION PROCEDURE

 With CONSULT-II

1.

Perform 

EC-44, "Accelerator Pedal Released Position Learning"

 .

2.

Perform 

EC-44, "Throttle Valve Closed Position Learning"

 .

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

6.

Touch “START” and wait 20 seconds.

7.

Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, Idle Air Volume Learning will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the DIAGNOSTIC PROCEDURE below.

8.

Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.

 Without CONSULT-II

NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

1.

Perform 

EC-44, "Accelerator Pedal Released Position Learning"

 .

SEF217Z

SEF454Y

ITEM

SPECIFICATION

Idle speed

650 

±

 50 rpm (in P or N position)

Ignition timing

12 

±

 5

°

 BTDC (in P or N position)

MBIB0238E

EC-46

BASIC SERVICE PROCEDURE

2.

Perform 

EC-44, "Throttle Valve Closed Position Learning"

 .

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

7.

Repeat the following procedure quickly five times within 5 seconds.

a.

Fully depress the accelerator pedal.

b.

Fully release the accelerator pedal.

8.

Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.

9.

Fully release the accelerator pedal within 3 seconds after the MIL turned ON.

10. Start engine and let it idle.

11. Wait 20 seconds.

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried

out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as follows:

1.

Check that throttle valve is fully closed.

2.

Check PCV valve operation.

3.

Check that downstream of throttle valve is free from air leakage.

4.

When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
 
It is useful to perform 

EC-128, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

5.

If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:

Engine stalls.

Erroneous idle.

Fuel Pressure Check

ABS002DE

FUEL PRESSURE RELEASE

 With CONSULT-II

1.

Turn ignition switch ON.

ITEM

SPECIFICATION

Idle speed

650 

±

 50 rpm (in P or N position)

Ignition timing

12 

±

 5

°

 BTDC (in P or N position)

SEC897C

BASIC SERVICE PROCEDURE

EC-47

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2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel
pressure.

5.

Turn ignition switch OFF.

 Without CONSULT-II

1.

Remove fuel pump fuse located in fuse box.

2.

Start engine.

3.

After engine stalls, crank it two or three times to release all fuel
pressure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

SEF214Y

PBIB0041E

EC-48

BASIC SERVICE PROCEDURE

FUEL PRESSURE CHECK

CAUTION:

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:

Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.

Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be released because Y34 models do not have fuel return system.

1.

Release fuel pressure to zero. Refer to 

EC-46, "FUEL PRESSURE RELEASE"

 .

2.

Install the inline fuel quick disconnected fitting between fuel
damper and injector tube.

3.

Connect the fuel pressure test gauge (quick connector adapter
hose) to the inline fuel quick disconnected fitting.

4.

Turn ignition switch ON and check for fuel leakage.

5.

Start engine and check for fuel leakage.

6.

Read the indication of fuel pressure gauge.

7.

If result is unsatisfactory, go to next step.

8.

Check the following.

Fuel hoses and fuel tubes for clogging

Fuel filter for clogging

Fuel pump

Fuel pressure regulator for clogging

If OK, replace fuel pressure regulator.
If NG, repair or replace.

PBIB1126E

At idling:

Approximately 350 kPa (3.57 kg/cm

2

 , 51 

psi)

PBIB1134E

 

 

 

 

 

 

 

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