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Home >> Infiniti >> 2022 >> QX60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (3 Of 3) >> Symptom Diagnosis >> Engine Control System Symptoms >> Symptom Table >> System -- Engine Mechanical & Other
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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

Exploded View

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

Exploded View

Air cleaner

Exploded View

Air leakage from air duct

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

5

5

5

5

Exploded View

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 165-DSS-5000P) , Work Flow (Without 165-DSS-5000P)

Starter circuit

3

Work Flow (With 165-DSS-5000P) , Work Flow (Without 165-DSS-5000P)

Signal plate

6

Inspection

PNP signal circuit

4

DTC Description

Engine

Cylinder head

5

5

5

5

5

5

5

5

Inspection After Disassembly

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

Exploded View

Camshaft

Inspection After Removal

Intake valve timing control

Exploded View

Exhaust valve timing control

Exploded View

Intake valve

3

Inspection After Disassembly

Exhaust valve

Exhaust

Tube/Muffler/Gasket

5

5

5

5

5

5

5

5

Exploded View , Exploded View

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 , Removal and Installation , Lubrication Circuit

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

Cooling Circuit

Cooling fan

5

Exploded View

Coolant level (Low)/Contaminated coolant

System Inspection

Thermostat

Exploded View

NVIS (NISSAN Vehicle Immobilizer System -- NATS)

1

1

Work Flow

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