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 TANK : Inspection .

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

Refer to AIR CLEANER AND AIR DUCT : Inspection .

Air cleaner

Refer to AIR CLEANER FILTER : Inspection .

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 CHARGE AIR COOLER : Exploded View .

Air leakage from intake manifold/Collector/Gasket

Refer to INTAKE MANIFOLD COLLECTOR : Exploded View .

Cranking

Battery

1

1

1

1

1

1

1

1

Refer to How To Check .

Generator circuit

Refer to Work Flow .

Starter circuit

3

Refer to Work Flow .

Signal plate

6

Refer to DRIVE PLATE : Inspection .

PNP signal circuit

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 System Description .

Exhaust valve timing control

Refer to System Description .

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 CATALYST : Exploded View or EXHAUST SYSTEM : Inspection .

Three way catalyst

Lubrication

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

5

5

5

5

5

5

5

5

Refer to OIL PAN (LOWER) : Exploded View or OIL PAN (UPPER) : Exploded View or OIL FILTER : Inspection or OIL PUMP : Inspection .

Oil level (Low)/Filthy oil

Refer to ENGINE OIL : Inspection .

Variable displacement oil pump

5

5

4

4

Refer to DTC Description .

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

Refer to RADIATOR : Exploded View or WATER OUTLET AND WATER PIPING : Exploded View .

Water pump

Refer to WATER PUMP : Exploded View .

Water gallery

Refer to System Description .

Cooling fan

5

Refer to ENGINE COOLING FAN : Exploded View .

Coolant level (Low)/Contaminated coolant

Refer to ENGINE COOLANT : Inspection .

Multi-way control valve

4

Refer to DTC Description or DTC Description or DTC Description .

IVIS (INFINITI Vehicle Immobilizer System -- NATS)

1

1

Refer to Work Flow .