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

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

Inspection

Air cleaner

Inspection (Viscous Paper Type)

Air leakage from air duct

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

5

5

5

5

Inspection

Electric throttle control actuator

Exploded View

Air leakage from intake manifold/Collector/Gasket

Exploded View , Exploded View

Cranking

Battery

1

1

1

1

1

1

1

1

How to Handle Battery

Generator circuit

Work Flow (With EXP-800 NI or GR8-1200 NI) , Work Flow (Without EXP-800 NI or GR8-1200 NI)

Starter circuit

3

Work Flow (With GR8-1200 NI) , Work Flow (Without GR8-1200 NI)

Signal plate

6

Inspection

PNP signal circuit

4

DTC Description

Engine

Cylinder head

5

5

5

5

5

5

5

5

Inspection

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

Inspection

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve mechanism

Timing chain

5

5

5

5

5

5

5

5

Inspection

Camshaft

Inspection

Intake valve timing control

System Description

Exhaust valve timing control

System Description

Intake valve

3

Inspection

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/Gasket

5

5

5

5

5

5

5

5

Exploded View , Inspection

Three way catalyst

Lubrication

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

5

5

5

5

5

5

5

5

Exploded View , Exploded View , Exploded View , Exploded View , Inspection , Inspection

Oil level (Low)/Filthy oil

Inspection

Variable displacement oil pump

5

5

4

4

DTC Description

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

Exploded View , Exploded View

Water pump

Exploded View

Water gallery

Engine Cooling System

Cooling fan

5

Exploded View

Coolant level (Low)/Contaminated coolant

Inspection

Multi-way control valve

4

DTC Description , DTC Description , DTC Description

IVIS (INFINITI Vehicle Immobilizer System -- NATS)

1

1

Work Flow