Infiniti M35/M45 Y50. Manual — part 582

TROUBLE DIAGNOSIS

EC-801

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Symptom Matrix Chart

NBS005AH

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Reference
page

HARD/NO ST

AR

T/REST

AR

T

(

EXCP

.

HA)

ENGINE ST

AL

L

HESIT

A

TI

ON/SURGI

N

G/FL

A

T SPOT

SP

ARK KNOCK/

DET

O

NA

TION

L

A

CK OF POW

E

R/POOR

A

C

CE

L

E

RA

TI

ON

HIGH IDL

E

/L

OW

IDL

E

ROUGH IDL

E

/HUNTIN

G

IDLING

VIBRA

T

IO

N

SL

OW

/NO

RETURN T

O

IDL

E

OVERHEA

T

S/W

A

TER T

E

M

P

ERA

T

U

R

E

HIGH

EXCESSIVE FUEL CONSUM

P

T

ION

EXCESSIVE OI

L

CONSUM

P

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-1395

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-791

Fuel injector circuit

1

1

2

3

2

2

2

2

EC-1389

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-741

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-753

Incorrect idle speed adjustment

1

1

1

1

1

EC-780

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

EC-1322

,

EC-1334

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-780

Ignition circuit

1

1

2

2

2

2

2

2

EC-1411

Main power supply and ground circuit

2

2

3

3

3

3

3

2

3

EC-858

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-906

,

EC-915

Engine coolant temperature sensor circuit

3

3

3

EC-926

,

EC-939

Air fuel ratio (A/F) sensor 1 circuit

EC-947

,

EC-957

,

EC-966

,

EC-975

,

EC-1365

Throttle position sensor circuit

2

2

EC-932

,

EC-1054

,

EC-1233

,

EC-1235

,

EC-1350

Accelerator pedal position sensor circuit

3

2

1

EC-1193

,

EC-1336

,

EC-1343

,

EC-1357

Knock sensor circuit

2

3

EC-1070

Crankshaft position sensor (POS) circuit

2

2

EC-1075

Camshaft position sensor (PHASE) circuit

3

2

EC-1082

Vehicle speed signal circuit

2

3

3

3

EC-1175

Power steering pressure sensor circuit

2

3

3

EC-1181

EC-802

[VK45DE]

TROUBLE DIAGNOSIS

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

SYSTEM — ENGINE MECHANICAL & OTHER

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-1186

,

EC-1190

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-899

PNP switch circuit

3

3

3

3

3

EC-1198

Refrigerant pressure sensor circuit

2

3

3

4

EC-1424

Electrical load signal circuit

3

EC-1387

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

ATC-40

VIAS control solenoid valve circuit

1

EC-1302

ABS actuator and electric unit (control unit)

4

BRC-10

SYMPTOM

Reference
page

HARD/

NO ST

AR

T

/REST

AR

T (

EXCP

. H

A

)

ENGI

NE ST

ALL

HESI

T

A

TION/

S

URGING/

FL

A

T

SPOT

SP

ARK KNOCK/DET

O

NA

TI

ON

L

A

CK OF

POW

E

R/POO

R

ACCEL

E

RA

TION

HI

GH I

D

L

E

/L

OW

I

D

L

E

ROUG

H IDL

E

/HUNTING

ID

L

ING VI

BRA

T

ION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

T

S/

W

A

TER TEMPERA

T

URE HI

GH

EXCESSIVE F

U

E

L

CONSUM

P

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

SYMPTOM

Reference
page

HARD/

NO ST

AR

T

/REST

AR

T (

EXCP

. HA)

ENGI

NE ST

ALL

HESI

T

A

TION/

S

URGING/

F

L

A

T

SP

O

T

SP

ARK KNOCK/DET

O

NA

TI

ON

L

A

CK OF

POW

E

R/POO

R

ACCEL

E

RA

TION

H

IG

H

ID

L

E

/L

OW

ID

L

E

ROUG

H IDL

E

/H

UNT

IN

G

ID

L

ING VI

BRA

T

ION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

T

S/

W

A

TER TEMPERA

T

URE HI

GH

EXCESSIVE F

U

EL CONSUM

P

T

ION

EXCESSIVE OIL

CONSUM

P

T

ION

BA

TTER

Y

DEAD (U

NDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel tank

5

5

FL-10

Fuel piping

5

5

5

5

5

5

EM-193

Vapor lock

—

Valve deposit

5

5

5

5

5

5

5

—

Poor fuel (Heavy weight gaso-
line, Low octane)

—

TROUBLE DIAGNOSIS

EC-803

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Air

Air duct

5

5

5

5

5

5

EM-177

Air cleaner

EM-177

Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)

5

5

5

5

EM-177

Electric throttle control actuator

EM-179

Air leakage from intake manifold/
Collector/Gasket

EM-179

Cranking

Battery

1

1

1

1

1

1

1

1

SC-4

Generator circuit

SC-20

Starter circuit

3

SC-8

Signal plate

6

EM-252

PNP switch

4

AT-113

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-235

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-252

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mecha-
nism

Timing chain

5

5

5

5

5

5

5

5

EM-203

Camshaft

EM-215

Intake valve timing control

EM-215

Intake valve

3

EM-235

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

5

5

5

5

5

5

5

5

EM-183

,

EX-3

Three way catalyst

Lubrica-
tion

Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery

5

5

5

5

5

5

5

5

EM-187

,

LU-31

,

LU-

30

Oil level (Low)/Filthy oil

LU-27

SYMPTOM

Reference
page

HARD/

NO ST

AR

T

/REST

AR

T (

EXCP

. H

A

)

ENGI

NE ST

ALL

HESI

T

A

TION/

S

URGING/

FL

A

T

SPOT

SP

ARK KNOCK/DET

O

NA

TI

ON

L

A

CK OF

POW

E

R/POO

R

ACCEL

E

RA

TION

HI

GH I

D

L

E

/L

OW

I

D

L

E

ROUG

H IDL

E

/HUNTING

ID

L

ING VI

BRA

T

ION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

T

S/

W

A

TER TEMPERA

T

URE HI

GH

EXCESSIVE F

U

E

L

CONSUM

P

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

EC-804

[VK45DE]

TROUBLE DIAGNOSIS

1 - 6: The numbers refer to the order of inspection.

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

CO-43

,

CO-47

Thermostat

5

CO-55

Water pump

CO-53

Water gallery

CO-38

Cooling fan

5

CO-51

Coolant level (Low)/Contami-
nated coolant

CO-40

IVIS (INFINITI Vehicle Immobilizer System —
NATS)

1

1

EC-755

or

BL-244

SYMPTOM

Reference
page

HARD/

NO ST

AR

T

/REST

AR

T (

EXCP

. H

A

)

ENGI

NE ST

ALL

HESI

T

A

TION/

S

URGING/

FL

A

T

SPOT

SP

ARK KNOCK/DET

O

NA

TI

ON

L

A

CK OF

POW

E

R/POO

R

ACCEL

E

RA

TION

HI

GH I

D

L

E

/L

OW

I

D

L

E

ROUG

H IDL

E

/HUNTING

ID

L

ING VI

BRA

T

ION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

T

S/

W

A

TER TEMPERA

T

URE HI

GH

EXCESSIVE F

U

E

L

CONSUM

P

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