Infiniti M35/M45 Y50. Manual - part 578

BASIC SERVICE PROCEDURE

EC-785

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17. 

DETECT MALFUNCTIONING PART

Check the following.

●

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

EC-1082, "DTC P0340 CAMSHAFT POSI-

TION (CMP) SENSOR (PHASE)"

 .

●

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

EC-1075, "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-787, "VIN Registration"

 .

2. INSPECTION END

No

>> INSPECTION END

Idle Speed and Ignition Timing Check

NBS005A7

IDLE SPEED

 With CONSULT-II

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

 With GST

Check idle speed with GST.

IGNITION TIMING

Any of following two methods may be used.

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EC-786

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BASIC SERVICE PROCEDURE

Method A

1.

Attach timing light A to loop wire (1) as shown.

2.

Check ignition timing.

●

Timing indicator (1)

Method B

1.

Remove ignition coil No. 1 (1).

2.

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

PBIB2717E

PBIB2719E

PBIB2716E

PBIB2718E

BASIC SERVICE PROCEDURE

EC-787

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3.

Check ignition timing.

●

Timing indicator (1)

Procedure After Replacing ECM

NBS005SH

When replacing ECM, the following procedure must be performed.

1.

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

BL-248, "ECM Re-Communicating Function"

 .

2.

Perform 

EC-787, "VIN Registration"

 .

3.

Perform 

EC-788, "Accelerator Pedal Released Position Learning"

 .

4.

Perform 

EC-788, "Throttle Valve Closed Position Learning"

 .

5.

Perform 

EC-788, "Idle Air Volume Learning"

 .

VIN Registration

NBS005A9

DESCRIPTION

VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

OPERATION PROCEDURE

 With CONSULT-II

1.

Check the VIN of the vehicle and note it. Refer to 

GI-48, "IDENTIFICATION INFORMATION"

 .

2.

Turn ignition switch ON and engine stopped.

3.

Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

4.

Follow the instruction of CONSULT-II display.

SEF166Y

PBIB2719E

PBIB2242E

EC-788

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BASIC SERVICE PROCEDURE

Accelerator Pedal Released Position Learning

NBS005AA

DESCRIPTION

Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch ON and wait at least 2 seconds.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Repeat steps 2 and 3 four times.

Throttle Valve Closed Position Learning

NBS005AB

DESCRIPTION

Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

NBS005AC

DESCRIPTION

Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:

●

Each time electric throttle control actuator or ECM is replaced.

●

Idle speed or ignition timing is out of specification.

PREPARATION

Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

●

Battery voltage: More than 12.9V (At idle)

●

Engine coolant temperature: 70 - 105

°

C (158 - 221

°

F)

●

PNP switch: ON

●

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
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

–

With CONSULT-II: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indi-
cates less than 0.9V.

–

Without CONSULT-II: Drive vehicle for 10 minutes.

OPERATION PROCEDURE

 With CONSULT-II

1.

Perform 

EC-788, "Accelerator Pedal Released Position Learning"

 .

2.

Perform 

EC-788, "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.