Nissan Maxima. Manual - part 524

EC-580

< WIRING DIAGRAM >

[VQ35DE]

ENGINE CONTROL SYSTEM

AABIA0915GB

ENGINE CONTROL SYSTEM SYMPTOMS

EC-581

< SYMPTOM DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000010095247

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Reference 
page

HARD/NO ST

AR

T

/REST

AR

T

 (EXCP

. 

H

A

)

ENGINE ST

ALL

HESIT

A

TION/SURGING/FLA

T

 SPOT

SP

ARK KNOCK/DET

O

NA

TION

LACK

 OF POWER/

POOR 

ACC

E

LERA

TION

HIGH IDL

E/LOW

 IDLE

ROUG

H IDLE/HUNTING

IDLI

NG VIBRA

TION

SLOW

/NO RETURN T

O

 IDLE

OVERHEA

T

S/W

A

TER TEMPERA

T

UR

E

 HIGH

EXCESS

IVE F

U

E

L CONSUMP

T

IO

N

EXCESS

IVE OIL CONSUMP

T

ION

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-499

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-592

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-496

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-94

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-514

Incorrect idle speed adjustment

1

1

1

1

1

EC-14

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-458

, 

EC-465

Ignition Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-14

Ignition  circuit

1

1

2

2

2

2

2

2

EC-502

Power  supply  and  ground  circuit

2

2

3

3

3

3

3

2

3

EC-157

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-183

, 

EC-189

Engine coolant temperature sensor circuit

3

3

3

EC-204

, 

EC-210

Air fuel ratio (A/F) sensor 1 circuit

EC-218

, 

EC-222

, 

EC-226

, 

EC-255

, 

EC-451

Throttle position sensor circuit

2

2

EC-207

, 

EC-284

, 

EC-410

, 

EC-412

, 

EC-474

Accelerator pedal position sensor circuit

3

2

1

EC-394

, 

EC-467

, 

EC-470

, 

EC-477

EC-582

< SYMPTOM DIAGNOSIS >

[VQ35DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

SYSTEM — ENGINE MECHANICAL & OTHER

Knock sensor circuit

2

3

EC-293

Engine oil temperature sensor

4

2

3

EC-277

, 

EC-281

Crankshaft position sensor (POS) circuit

2

2

EC-296

Camshaft position sensor (PHASE) circuit

3

2

EC-300

Vehicle speed signal circuit

2

3

3

3

EC-378

Power steering pressure sensor circuit

2

3

3

EC-386

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-389

, 

EC-391

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-177

PNP signal circuit

3

3

3

3

3

EC-397

VIAS control solenoid valve 1 circuit

1

EC-442

VIAS control solenoid valve 2 circuit

1

EC-445

Refrigerant pressure sensor circuit

2

3

3

4

EC-515

Electrical load signal circuit

3

EC-491

Air  conditioner  circuit

2

2

3

3

3

3

3

3

3

3

2

HA-17

, 

HA-

17

ABS actuator and electric unit (control unit)

4

BRC-4

SYMPTOM

Reference 
page

HARD/NO S

TA

R

T/RES

TA

R

T (E

XCP

. HA)

E

N

GINE

 ST

ALL

HES

IT

A

TION/SURGING/FLA

T

 SPOT

S

P

ARK KNOC

K

/DET

O

NA

TI

ON

LACK OF 

POWER/POOR ACCELERA

TION

HIG

H

 IDL

E

/L

OW

 ID

LE

ROUGH IDLE/HUNTING

ID

LING VI

BRA

T

ION

S

LOW/NO RETU

RN 

T

O ID

LE

OVERHEA

T

S

/W

A

TER TEMPERA

T

URE HIG

H

E

XCESSIVE

 FUEL CON

S

UMP

T

ION

E

XCESSIVE

 OIL 

C

O

NSUMP

T

ION

B

A

TTER

Y 

DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF AG AH

AJ

AK

AL

AM HA

ENGINE CONTROL SYSTEM SYMPTOMS

EC-583

< SYMPTOM DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

SYMPTOM

Reference 
page

HARD/NO ST

AR

T/REST

AR

T (EXCP

. 

HA)

E

N

GI

N

E

 ST

AL

L

HESIT

A

TION/S

U

R

GING/F

LA

T SP

OT

SP

ARK KNOCK/DE

T

O

NA

TION

LACK OF POWE

R/POOR

 ACCELERA

TIO

N

HIGH IDL

E/L

OW

 IDL

E

ROUG

H IDLE/HU

NTING

IDL

ING VIBRA

T

ION

SLO

W

/NO RETURN T

O

 IDLE

OVERHEA

T

S/W

A

TE

R

 TEMPERA

T

URE 

HIGH

EXCES

SIVE F

U

EL CONSUMP

T

ION

EXCES

SIVE OI

L CONSUMP

T

IO

N

BA

TTE

R

Y 

DEAD (UN

D

E

R

 CH

A

R

GE)

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

FL-5

Vapor lock

—

Valve deposit

5

5

5

5

5

5

5

—

Poor fuel (Heavy weight gasoline, 
Low octane)

—

Air

Air duct

5

5

5

5

5

5

EM-25

Air cleaner

EM-25

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

5

5

5

5

EM-25

Electric throttle control actuator

EM-25

Air leakage from intake manifold/
Collector/Gasket

EM-25

, 

EM-28

Cranking

Battery

1

1

1

1

1

1

1

1

PG-67

Generator circuit

CHG-29

Starter circuit

3

STR-8

Signal plate

6

EM-95

PNP signal

4

TM-51

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-95

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-107

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve 
mecha-
nism

Timing chain

5

5

5

5

5

5

5

5

EM-64

Camshaft

EM-81

Intake valve timing control

EM-52

, 

EM-53

Intake valve

3

EM-95

Exhaust valve