Infiniti FX35, FX50 (S51). Manual - part 920

VVEL CONTROL MODULE

EC-1221

< ECU DIAGNOSIS INFORMATION >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

JCBWA1540GB

EC-1222

< ECU DIAGNOSIS INFORMATION >

[VK50VE]

VVEL CONTROL MODULE

JCBWA1541GB

ENGINE CONTROL SYSTEM SYMPTOMS

EC-1223

< SYMPTOM DIAGNOSIS >

[VK50VE]

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:0000000005237657

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-999
EC-1106

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-1236

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-1103

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-1237

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-1125

Incorrect idle speed adjustment

1

1

1

1

1

EC-576

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-1006
EC-1013

Ignition

Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-576

Ignition  circuit

1

1

2

2

2

2

2

2

EC-1114

Main  power  supply  and  ground  circuit

2

2

3

3

3

3

3

2

3

EC-736

EC-1224

< SYMPTOM DIAGNOSIS >

[VK50VE]

ENGINE CONTROL SYSTEM SYMPTOMS

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-745
EC-772

Engine coolant temperature sensor circuit

3

3

3

EC-790
EC-792
EC-798

Air fuel ratio (A/F) sensor 1 circuit

EC-805
EC-809
EC-812
EC-815
EC-1088

Throttle position sensor circuit

2

2

EC-795
EC-860
EC-1002
EC-1004
EC-1015

Accelerator pedal position sensor circuit

3

2

1

EC-1074
EC-1078
EC-1083

Knock sensor circuit

2

3

EC-870

Engine oil temperature sensor

4

2

3

EC-854
EC-857

Crankshaft position sensor circuit

2

2

EC-873

Camshaft position sensor circuit

3

2

EC-877

Vehicle speed signal circuit

2

3

3

3

EC-948

Power steering pressure sensor circuit

2

3

3

EC-957

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-962
EC-964

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-752
EC-766

Exhaust valve timing control solenoid valve 
circuit

3

2

1

3

2

2

3

3

EC-756
EC-769

VVEL control module

3

4

4

3

EC-1063
EC-1065

VVEL actuator motor

3

4

4

3

EC-985

VVEL actuator motor relay

3

4

4

3

EC-989

VVEL actuator shaft position sensor

3

4

4

3

EC-981

PNP signal circuit

3

3

3

3

3

EC-968

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

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