Infiniti G35 (V35) Sedan. Manual - part 596

EC-530

< ECU DIAGNOSIS >

[VQ35HR]

ECM

HO2S

HEATER

A/F sensor 1 heater (Bank 1) 

P0032

57H

10H

Max.

5 mV

P0031

58H

90H

Min.

5 mV

A/F sensor 1 heater (Bank 2)

P0052

59H

11H

Max.

5 mV

P0051

5AH

91H

Min.

5 mV

Heated oxygen sensor 2 heater (Bank 1)

P0038

2DH

0AH

Max.

20 mV

P0037

2EH

8AH

Min.

20 mV

Heated oxygen sensor 2 heater (Bank 2)

P0058

2FH

0BH

Max.

20 mV

P0057

30H

8BH

Min.

20 mV

Item

Self-diagnostic test item

DTC

Test value

(GST display)

Test limit

Conversion

TID

CID

ENGINE CONTROL SYSTEM SYMPTOMS

EC-531

< SYMPTOM DIAGNOSIS >

[VQ35HR]

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:0000000000956905

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

T

ION

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-458

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-543

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-455

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-76

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-477

Incorrect idle speed adjustment

1

1

1

1

1

EC-12

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-362

, 

EC-369

Ignition

Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-12

Ignition  circuit

1

1

2

2

2

2

2

2

EC-466

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-159

, 

EC-166

Engine coolant temperature sensor circuit

3

3

3

EC-174

, 

EC-180

Air fuel ratio (A/F) sensor 1 circuit

EC-187

, 

EC-191

, 

EC-194

, 

EC-197

, 

EC-439

Throttle position sensor circuit

2

2

EC-177

, 

EC-242

, 

EC-358

, 

EC-360

, 

EC-371

Accelerator pedal position sensor circuit

3

2

1

EC-425

, 

EC-429

, 

EC-434

Knock sensor circuit

2

3

EC-251

EC-532

< SYMPTOM DIAGNOSIS >

[VQ35HR]

ENGINE CONTROL SYSTEM SYMPTOMS

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

(continued on next page)

SYSTEM — ENGINE MECHANICAL & OTHER

Engine oil temperature sensor

4

2

3

EC-236

, 

EC-239

Crankshaft position sensor (POS) circuit

2

2

EC-254

Camshaft position sensor (PHASE) circuit

3

2

EC-258

Vehicle speed signal circuit

2

3

3

3

EC-328

Power steering pressure sensor circuit

2

3

3

EC-334

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-336

, 

EC-338

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-153

Exhaust valve timing control magnet retarder 
circuit

3

2

1

3

2

2

3

3

EC-156

PNP switch circuit

3

3

3

3

3

EC-342

Refrigerant pressure sensor circuit

2

3

3

4

EC-479

Electrical load signal circuit

3

EC-453

Air  conditioner  circuit

2

2

3

3

3

3

3

3

3

3

2

HAC-4

ABS actuator and electric unit (control unit)

4

BRC-4

SYMPTOM

Reference 
page

HARD/NO S

T

A

R

T/RES

T

A

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

L

OW/NO RETU

RN 

T

O

 ID

LE

OVERHEA

T

S

/W

A

TER TEMPERA

T

URE HIG

H

E

X

CESSIVE

 FUEL CON

S

UMP

T

ION

E

X

CESSIVE

 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-533

< SYMPTOM DIAGNOSIS >

[VQ35HR]

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

N

TING

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-11

Fuel piping

5

5

5

5

5

5

EM-40

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-26

Air cleaner

EM-26

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

5

5

5

5

EM-26

Electric throttle control actuator

EM-27

Air leakage from intake manifold/
Collector/Gasket

EM-31

Cranking

Battery

1

1

1

1

1

1

1

1

PG-98

Generator circuit

CHG-21

, 

CHG-22

Starter circuit

3

STR-17

Signal plate

6

EM-124

PNP switch

4

TM-9

, 

TM-

124

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-111

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-124

Piston

Piston ring

Connecting rod

Bearing

Crankshaft