Nissan Frontier D40. Instruction — part 563

ENGINE CONTROL SYSTEM SYMPTOMS

EC-943

< SYMPTOM DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000005273902

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-862

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-954

Fuel injector circuit

1

1

2

3

2

2

2

2

EC-858

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-493

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-876

Incorrect idle speed adjustment

1

1

1

1

1

EC-468

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

EC-817

,

EC-823

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-468

Ignition circuit

1

1

2

2

2

2

2

2

EC-866

Power supply and ground circuit

2

2

3

3

3

3

3

2

3

EC-546

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-565

,

EC-571

Engine coolant temperature sensor circuit

3

3

3

EC-582

,

EC-590

Air fuel ratio (A/F) sensor 1

EC-598
EC-602
EC-606
EC-610
EC-840

Throttle position sensor circuit

2

2

EC-586

,

EC-653

,

EC-772

,

EC-774

,

EC-832

Accelerator pedal position sensor circuit

3

2

1

EC-546

,

EC-825

,

EC-828

,

EC-836

EC-944

< SYMPTOM DIAGNOSIS >

[VQ40DE]

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-664

Crankshaft position sensor (POS) circuit

2

2

EC-667

Camshaft position sensor (PHASE) circuit

3

2

EC-671

Vehicle speed signal circuit

2

3

3

3

EC-742

Power steering pressure sensor circuit

2

3

3

EC-750

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-753

,

EC-755

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-562

PNP signal circuit

3

3

3

3

3

EC-761

VIAS control solenoid valve circuit

1

EC-808

Refrigerant pressure sensor circuit

2

3

3

4

EC-878

Electrical load signal circuit

3

EC-856

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

HAC-58

,

HAC-129

ABS actuator and electric unit (control unit)

4

BRC-10

,

BRC-185

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

ENGINE CONTROL SYSTEM SYMPTOMS

EC-945

< SYMPTOM DIAGNOSIS >

[VQ40DE]

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-6

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-139

Air cleaner

EM-139

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

5

5

5

5

EM-139

Electric throttle control actuator

EM-140

Air leakage from intake manifold/
Collector/Gasket

EM-140

,

EM-143

Cranking

Battery

1

1

1

1

1

1

1

1

PG-4

Generator circuit

CHG-4

Starter circuit

3

STR-5

Signal plate

6

EM-225

PNP switch (M/T)
TCM (A/T)

4

TM-163

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-205

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-225

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mecha-
nism

Timing chain

5

5

5

5

5

5

5

5

EM-173

Camshaft

EM-187

Intake valve timing control

EM-199

Intake valve

3

EM-205

Exhaust valve

EC-946

< SYMPTOM DIAGNOSIS >

[VQ40DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

5

5

5

5

5

5

5

5

EM-146

,

EX-4

Three way catalyst

Lubrica-
tion

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

5

5

5

5

5

5

5

5

EM-149

,

LU-25

,

LU-

27

,

Oil level (Low)/Filthy oil

LU-21

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

CO-38

Thermostat

5

CO-54

Water pump

CO-49

Water gallery

CO-56

Cooling fan

5

CO-46

Coolant level (Low)/Contaminat-
ed coolant

5

CO-38

NVIS (NISSAN Vehicle Immobilizer System —
NATS)

1

1

SEC-3

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