Infiniti I30 (A33). Manual - part 202

Symptom Matrix Chart

NHEC0041

SYSTEM — BASIC ENGINE CONTROL SYSTEM

NHEC0041S01

SYMPTOM

Reference
page

HARD/NO

ST

AR

T/REST

AR

T

(EXCP

.

HA)

ENGINE

ST

ALL

HESIT

A

TION/SURGING/FLA

T

SPOT

SP

ARK

KNOCK/DET

ONA

TION

LACK

OF

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

T

O

IDLE

OVERHEA

TS/W

A

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

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-618

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

EC-50

Injector circuit

1

1

2

3

2

2

2

2

EC-608

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EC-32

Air

Positive crankcase ventilation sys-
tem

1

EC-47

Incorrect idle speed adjustment

1

1

1

1

1

EC-109

IACV-AAC valve circuit

1

1

2

3

3

2

2

2

2

2

2

EC-429

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

EC-109

Ignition circuit

1

1

2

2

2

2

2

2

EC-506

Main power supply and ground circuit

2

2

3

3

3

3

3

2

3

EC-145

Air conditioner circuit

3

3

2

HA section

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

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart

EC-123

SYMPTOM

Reference
page

HARD/NO

ST

AR

T/REST

AR

T

(EXCP

.

HA)

ENGINE

ST

ALL

HESIT

A

TION/SURGING/FLA

T

SPOT

SP

ARK

KNOCK/DET

ONA

TION

LACK

OF

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

T

O

IDLE

OVERHEA

TS/W

A

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

BA

TTER

Y

DEAD

(UNDER

CHARGE)

Warranty symptom code

AA AB AC AD AE AF AG

AH

AJ

AK AL AM HA

Engine
control

Crankshaft position sensor (REF)
circuit

2

2

EC-517

Crankshaft position sensor (POS)
circuit

EC-343, 523

Camshaft position sensor
(PHASE) circuit

3

EC-351

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-152

Heated oxygen sensor 1 (front)
circuit

3

EC-192

Engine coolant temperature sen-
sor circuit

1

3

3

EC-171, 187

Throttle position sensor circuit

2

2

EC-176

Incorrect throttle position sensor
adjustment

3

1

1

1

1

1

1

1

EC-109

Vehicle speed sensor circuit

2

3

3

3

EC-425

Knock sensor circuit

2

EC-338

ECM

2

2

3

3

3

3

3

3

3

3

EC-449, 122

Start signal circuit

2

EC-614

Park/Neutral position switch circuit

3

3

3

3

3

EC-597

Power steering oil pressure switch
circuit

2

EC-628

Electronic controlled engine mount
control circuit

EC-624

Electrical load signal circuit

EC-637

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

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart (Cont’d)

EC-124

SYSTEM — ENGINE MECHANICAL & OTHER

NHEC0041S02

SYMPTOM

Reference
section

HARD/NO

ST

AR

T/REST

AR

T

(EXCP

.

HA)

ENGINE

ST

ALL

HESIT

A

TION/SURGING/FLA

T

SPOT

SP

ARK

KNOCK/DET

ONA

TION

LACK

OF

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

T

O

IDLE

OVERHEA

TS/W

A

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

BA

TTER

Y

DEAD

(UNDER

CHARGE)

Warranty symptom code

AA AB AC AD AE AF AG

AH

AJ

AK AL AM HA

Fuel

Fuel tank

5

5

FE section

Fuel piping

5

5

5

5

5

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

Air cleaner

Air leakage from air duct
(Mass air flow sensor — throttle
body)

5

5

5

5

Throttle body, Throttle wire

FE section

Air leakage from intake manifold/
Collector/Gasket

—

Cranking

Battery

1

1

1

1

1

1

1

1

EL section

Alternator circuit

Starter circuit

3

Drive plate

6

EM section

PNP switch

4

AT section

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

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart (Cont’d)

EC-125

SYMPTOM

Reference
section

HARD/NO

ST

AR

T/REST

AR

T

(EXCP

.

HA)

ENGINE

ST

ALL

HESIT

A

TION/SURGING/FLA

T

SPOT

SP

ARK

KNOCK/DET

ONA

TION

LACK

OF

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

T

O

IDLE

OVERHEA

TS/W

A

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

BA

TTER

Y

DEAD

(UNDER

CHARGE)

Warranty symptom code

AA AB AC AD AE AF AG

AH

AJ

AK AL AM HA

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM section

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mechanism

Timing chain

5

5

5

5

5

5

5

5

Camshaft

Intake valve

3

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

5

5

5

5

5

5

5

5

FE section

Three way catalyst

Lubrication

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

5

5

5

5

5

5

5

5

MA, EM, LC
section

Oil level (Low)/Filthy oil

LC section

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

Thermostat

5

Water pump

Water gallery

Cooling fan

5

EC section

Coolant level (low)/Contaminated
coolant

MA section

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

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart (Cont’d)

EC-126