Infiniti M45 (Y34). Manual — part 349

TROUBLE DIAGNOSIS

EC-85

C

D

E

F

G

H

I

J

K

L

M

A

EC

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-38, "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-317

.

●

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

EC-309

.

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

BL-174, "ECM Re-Communicating Function"

.

>> GO TO 4.

12

±

5

°

BTDC (in P or N position)

PBIB1242E

EC-86

TROUBLE DIAGNOSIS

Symptom Matrix Chart

ABS002DP

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-519

,

EC-674

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-46

Injector circuit

1

1

2

3

2

2

2

2

EC-661

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-692

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-704

Incorrect idle speed adjustment

1

1

1

1

1

EC-81

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

EC-440

,

EC-442

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-81

Ignition signal circuit

1

1

2

2

2

2

2

2

EC-649

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-174

,

EC-182

,

EC-422

Engine coolant temperature sensor circuit

3

3

3

EC-193

,

EC-205

Heated oxygen sensor 1 circuit

EC-214

,

EC-224

,

EC-236

,

EC-468

,

EC-474

Throttle position sensor circuit

2

2

EC-199

,

EC-292

,

EC-527

,

EC-529

,

EC-627

Accelerator pedal position sensor circuit

3

2

1

EC-615

,

EC-621

,

EC-634

Knock sensor circuit

2

3

EC-304

Crankshaft position sensor (POS) circuit

2

2

EC-309

Camshaft position sensor (PHASE) circuit

3

2

EC-317

Vehicle speed signal circuit

2

3

3

3

EC-399

TROUBLE DIAGNOSIS

EC-87

C

D

E

F

G

H

I

J

K

L

M

A

EC

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

Power steering pressure sensor circuit

2

3

3

EC-405

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-410

,

EC-418

Intake valve timing control solenoid valve cir-
cuit

3

3

2

1

3

2

2

3

3

EC-428

Park/neutral position (PNP) switch circuit

3

3

3

3

3

EC-600

Start signal circuit

2

EC-670

Refrigerant pressure sensor circuit

2

3

3

4

EC-680

Electrical load signal circuit

3

3

EC-685

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

ATC-34

Radiator coolant temperature sensor circuit

EC-434

Cooling fan speed control solenoid valve cir-
cuit

EC-578

VIAS control solenoid valve circuit

1

EC-641

VDC/TCS/ABS control unit

4

EC-507

,

EC-508

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-88

TROUBLE DIAGNOSIS

SYSTEM — ENGINE MECHANICAL & OTHER

SYMPTOM

Reference
page

HARD/

NO ST

AR

T/

REST

AR

T (

E

X

C

P

. HA)

ENGI

NE ST

ALL

HESIT

A

TION/SURG

ING/FL

A

T S

P

OT

SP

ARK K

N

O

C

K/DET

O

NA

TI

ON

L

A

CK

OF P

O

W

E

R/POOR ACCEL

E

R

A

TION

HI

GH ID

L

E

/L

OW

I

D

L

E

ROUGH IDL

E

/HUNTI

N

G

ID

L

ING VI

B

R

A

T

ION

SL

OW

/N

O RETURN

T

O

I

D

L

E

OVERHEA

T

S/W

A

T

E

R TEMPERA

T

URE

HI

GH

EXCESSIVE FUEL CO

NSUM

P

T

ION

EXCESSIVE O

IL CONSUM

P

T

IO

N

BA

TTER

Y

DEA

D

(UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel tank

5

5

FL-9

Fuel piping

5

5

5

5

5

5

FL-2

,

EM-

31

Vapor lock

—

Valve deposit

5

5

5

5

5

5

5

—

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

—

Air

Air duct

5

5

5

5

5

5

EM-16

Air cleaner

EM-16

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

5

5

5

5

EM-16

Electric throttle control actuator,
Throttle wire

EM-18

,

ACC-2

Air leakage from intake manifold/
Collector/Gasket

EM-18

Cranking

Battery

1

1

1

1

1

1

1

1

SC-4

Generator circuit

SC-17

Starter circuit

3

SC-9

Drive plate

6

EM-80

Park/neutral position (PNP)
switch

4

AT-110

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-65

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-80

Piston

Piston ring

Connecting rod

Bearing

Crankshaft