System -- Engine Mechanical & Other

SYMPTOM

Reference

HARD/NO START/RESTART (EXCP. HA)

ENGINE STALL

HESITATION/SURGING/FLAT SPOT

SPARK KNOCK/DETONATION

LACK OF POWER/POOR ACCELERATION

HIGH IDLE/LOW IDLE

ROUGH IDLE/HUNTING

IDLING VIBRATION

SLOW/NO RETURN TO IDLE

OVERHEATS/WATER TEMPERATURE HIGH

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

BATTERY DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel tank

5

5

Refer to FUEL SYSTEM : Inspection .

Fuel piping

5

5

5

5

5

5

Refer to FUEL SYSTEM : Inspection . Refer to FUEL SYSTEM : Inspection .

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

Refer to AIR CLEANER AND AIR DUCT : Inspection .

Air cleaner

Refer to AIR CLEANER AND AIR DUCT : Exploded View .

Air leakage from air duct

(Mass air flow sensor -- electric throttle control actuator)

5

5

5

5

Refer to AIR CLEANER AND AIR DUCT : Inspection .

Electric throttle control actuator

Refer to DTC Description .

Air leakage from intake manifold/Collector/Gasket

Refer to INTAKE MANIFOLD : Exploded View .

Cranking

Battery

1

1

1

1

1

1

1

1

Refer to Work Flow .

Generator circuit

Refer to Work Flow ..

Starter circuit

3

Refer to Work Flow .

Signal plate

6

Refer to CYLINDER BLOCK : Exploded View .

PNP signal

4

Refer to DTC Description .

Engine

Cylinder head

5

5

5

5

5

5

5

5

Refer to CYLINDER HEAD : Inspection .

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

Refer to CYLINDER BLOCK : Inspection .

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve mechanism

Timing chain

5

5

5

5

5

5

5

5

Refer to TIMING CHAIN : Inspection .

Camshaft

Refer to CAMSHAFT : Inspection .

Intake valve timing control

Refer to TIMING CHAIN : Exploded View .

Intake valve

3

Refer to CYLINDER HEAD : Inspection .

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/Gasket

5

5

5

5

5

5

5

5

Refer to EXHAUST MANIFOLD AND THREE WAY CATALYST : Inspection .

Refer to EXHAUST SYSTEM : Inspection (Removal & Installation) .

Three way catalyst

Lubrication

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

5

5

5

5

5

5

5

5

Refer to OIL PAN (LOWER) AND OIL STRAINER : Inspection .

Refer to OIL PAN (UPPER) : Inspection .

Refer to OIL FILTER : Inspection .

Refer to OIL COOLER : Inspection .

Refer to OIL PUMP : Inspection .

Oil level (Low)/Filthy oil

Refer to ENGINE OIL : Inspection .

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

Refer to RESERVOIR TANK CAP : Inspection .

Refer to RADIATOR : Inspection .

Water pump

Refer to WATER PUMP : Inspection .

Water gallery

Refer to WATER PUMP : Inspection .

Cooling fan

5

Refer to ENGINE COOLING FAN : Inspection .

Coolant level (Low)/Contaminated coolant

Refer to ENGINE COOLANT : Inspection .

Multi-way control valve

4

Refer to MULTI-WAY CONTROL VALVE : Inspection .

IVIS (INFINITI Vehicle Immobilizer System -- NATS)

1

1

Refer to Work Flow .