Infiniti F50. Manual — part 361

TROUBLE DIAGNOSIS

EC-85

C

D

E

F

G

H

I

J

K

L

M

A

EC

10.

CHECK IGNITION TIMING

1.

Run engine at idle.

2.

Check ignition timing with a timing light.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform

EC-46, "Accelerator Pedal Released Position Learning"

.

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-46, "Throttle Valve Closed Position Learning"

.

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-46, "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.

Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed.

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

12

±

5

°

BTDC (in “P” or “N” position)

PBIB1242E

650

±

50 rpm (in “P” or “N” position)

650

±

50 rpm (in “P” or “N” position)

SEF058Y

EC-86

TROUBLE DIAGNOSIS

15.

CHECK IGNITION TIMING AGAIN

1.

Run engine at idle.

2.

Check ignition timing with a timing light.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to

EM-35, "TIMING CHAIN"

.

OK or NG

OK

>> GO TO 17.

NG

>> 1. Repair the timing chain installation.

2. GO TO 4.

17.

DETECT MALFUNCTIONING PART

Check the following.

●

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

EC-315

.

●

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

EC-307

.

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-200, "ECM Re-communicating Function"

.

>> GO TO 4.

12

±

5

°

BTDC (in “P” or “N” position)

PBIB1242E

TROUBLE DIAGNOSIS

EC-87

C

D

E

F

G

H

I

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M

A

EC

Symptom Matrix Chart

EBS00LVZ

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Reference
page

HARD/NO ST

AR

T/REST

AR

T

(EXCP

.

HA)

ENGINE ST

AL

L

HESIT

A

T

ION/SURGI

NG/FLA

T

SPOT

SP

ARK KNOCK/

DET

ONA

TION

L

A

CK OF POW

ER/POOR

A

C

CE

L

E

RA

TI

ON

HIGH IDL

E/L

O

W

IDL

E

ROUGH IDL

E/HUNTIN

G

IDLING

VIBRA

TI

ON

SL

OW

/NO

RETURN T

O

IDL

E

OVERHEA

TS/W

A

TER T

E

M

P

ERA

T

U

RE

HIGH

EXCESSIVE FUEL CONSUM

P

T

ION

EXCESSIVE OI

L

CONSUMP

T

IO

N

BA

TTER

Y

DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel pump circuit

1

1

2

3

2

2

2

3

2

EC-513

,

EC-666

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-48

Injector circuit

1

1

2

3

2

2

2

2

EC-653

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-684

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-696

Incorrect idle speed adjustment

1

1

1

1

1

EC-82

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

EC-435

,

EC-437

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-82

Ignition signal circuit

1

1

2

2

2

2

2

2

EC-641

Main power supply and ground circuit

2

2

3

3

3

3

3

2

3

EC-133

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-171

,

EC-179

,

EC-418

Engine coolant temperature sensor circuit

3

3

3

EC-190

,

EC-201

Heated oxygen sensor 1 circuit

EC-212

,

EC-221

,

EC-233

,

EC-463

,

EC-469

Throttle position sensor circuit

2

2

EC-195

,

EC-291

,

EC-521

,

EC-523

,

EC-619

Accelerator pedal position sensor circuit

3

2

1

EC-607

,

EC-613

,

EC-626

Knock sensor circuit

2

3

EC-303

Crankshaft position sensor (POS) circuit

2

2

EC-307

Camshaft position sensor (PHASE) circuit

3

2

EC-315

Vehicle speed signal circuit

2

3

3

3

EC-395

EC-88

TROUBLE DIAGNOSIS

1 - 6: The numbers refer to the order of inspection.
(continued on next page)

Power steering pressure sensor circuit

2

3

3

EC-401

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-407

,

EC-414

Intake valve timing control solenoid valve cir-
cuit

3

3

2

1

3

2

2

3

3

EC-424

PNP switch circuit

3

3

3

3

3

EC-592

Start signal circuit

2

EC-662

Refrigerant pressure sensor circuit

2

3

3

4

EC-672

Electrical load signal circuit

3

3

EC-677

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

ATC-35

Radiator coolant temperature sensor circuit

EC-430

Cooling fan speed control solenoid valve cir-
cuit

EC-571

VIAS control solenoid valve circuit

1

EC-633

VDC/TCS/ABS control unit

4

EC-502

,

EC-503

SYMPTOM

Reference
page

HARD/

NO ST

AR

T

/REST

AR

T (

EXCP

. H

A

)

ENGI

NE ST

ALL

HESI

T

A

TION/

SURGING/

FL

A

T

SPOT

SP

ARK KNOCK/DET

ONA

T

IO

N

L

A

CK OF

POW

ER/POO

R ACCEL

ERA

TION

HI

GH I

D

L

E

/L

OW

I

D

L

E

ROUG

H IDL

E/

HUNTING

ID

L

ING VI

BRA

TION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

TS/

W

A

TER TEMPERA

TURE HI

GH

EXCESSIVE F

U

E

L

CONSUMP

T

IO

N

EXCESSIVE OIL

CONSUM

P

T

ION

BA

TTER

Y

DEAD (

UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA