Nissan Frontier D40. Manual — part 438

ENGINE CONTROL SYSTEM SYMPTOMS

EC-443

< SYMPTOM DIAGNOSIS >

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C

D

E

F

G

H

I

J

K

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M

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EC

N

P

O

SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000005273439

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-375

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-454

Fuel injector circuit

1

1

2

3

2

2

2

2

EC-375

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-42

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-392

Incorrect idle speed adjustment

3

3

1

1

1

1

1

EC-19

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

EC-136

,

EC-337

,

EC-340

,

EC-344

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-19

Ignition circuit

1

1

2

2

2

2

2

2

EC-382

Power supply and ground circuit

2

2

3

3

3

3

3

2

3

EC-382

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-106

,

EC-112

Engine coolant temperature sensor circuit

1

1

2

2

2

3

2

2

3

1

2

EC-123

,

EC-130

Throttle position sensor circuit

1

2

2

2

2

2

2

2

EC-337

,

EC-340

,

EC-344

,

EC-346

,

EC-355

Accelerator pedal position sensor circuit

3

2

1

2

2

EC-348

,

EC-351

,

EC-359

EC-444

< SYMPTOM DIAGNOSIS >

[QR25DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

(continued on next page)

SYSTEM — ENGINE MECHANICAL & OTHER

Air fuel ratio (A/F) sensor 1 circuit

1

2

3

2

2

2

2

EC-138

,

EC-142

,

EC-145

,

EC-148

,

EC-363

Knock sensor circuit

2

2

3

EC-197

Crankshaft position sensor (POS) circuit

2

2

EC-197

Camshaft position sensor (PHASE) circuit

2

2

EC-201

Vehicle speed signal circuit

2

3

3

3

EC-270

Power steering pressure sensor circuit

3

3

3

3

EC-276

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-279

,

EC-281

Intake valve timing control solenoid valve cir-
cuit

3

3

2

1

3

2

2

3

3

EC-94

Park/neutral position (PNP) signal circuit

3

3

3

3

3

3

3

EC-288

Refrigerant pressure sensor circuit

2

3

3

3

3

4

EC-394

Electrical load signal circuit

3

3

3

3

EC-374

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

HAC-117
HAC-50

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-445

< SYMPTOM DIAGNOSIS >

[QR25DE]

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

EM-38

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

EC-136

Air leakage from intake manifold/
Collector/Gasket

EM-27

Cranking

Battery

1

1

1

1

1

1

1

1

PG-6

Generator circuit

CHG-4

Starter circuit

3

STR-5

Signal plate/Flywheel/Drive plate

6

EM-74

Park/neutral position (PNP)
switch (M/T)
TCM (A/T)

4

TM-163

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-64

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-74

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

EC-446

< SYMPTOM DIAGNOSIS >

[QR25DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

Valve
mecha-
nism

Timing chain

5

5

5

5

5

5

5

5

EM-43

Camshaft

EM-52

Intake valve timing control

EC-100

Intake valve

3

EM-64

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

5

5

5

5

5

5

5

5

EM-30

,

EC-136

Three way catalyst

Lubrica-
tion

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

5

5

5

5

5

5

5

5

2

EM-32

,

LU-

12

,

LU-13

,

LU-7

Oil level (Low)/Filthy oil

LU-9

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

2

5

CO-16

Thermostat

5

CO-22

Water pump

CO-20

Water gallery

CO-7

Cooling fan

5

CO-19

Coolant level (low)/Contaminated
coolant

CO-11

NVIS (NISSAN Vehicle Immobilizer System —
NATS)

1

1

SEC-8

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