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Home >> Nissan-Datsun >> 2019 >> Altima SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Pr25DD) (3 Of 3) >> Symptom Diagnosis >> Engine Control System >> Symptom Table >> PR25DD engine >> System -- Engine Mechanical & Other
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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

DTC Diagnosis Procedure

Fuel piping

5

5

5

5

5

5

DTC Diagnosis Procedure

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

DTC Diagnosis Procedure

Air cleaner

Air leakage from air duct

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

5

5

5

5

Electric throttle control actuator

DTC Diagnosis ProcedureDTC Diagnosis Procedure

Air leakage from intake manifold/Collector/Gasket

Cranking

Battery

1

1

1

1

1

1

1

1

DTC Diagnosis Procedure

Generator circuit

DTC Diagnosis Procedure , DTC Diagnosis Procedure

Starter circuit

3

ENGINE COOLANT : Inspection

Signal plate

6

ENGINE COOLANT : Inspection

PNP signal

4

ENGINE COOLANT : Inspection

Engine

Cylinder head

5

5

5

5

5

5

5

5

ENGINE COOLANT : Inspection

ENGINE COOLANT : Inspection

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

ENGINE COOLANT : Inspection

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve mechanism

Timing chain

5

5

5

5

5

5

5

5

3

ENGINE COOLANT : Inspection

Camshaft

ENGINE COOLANT : Inspection

Intake valve timing control

ENGINE COOLANT : Inspection

Exhaust valve timing control

ENGINE COOLANT : Inspection

Intake valve

ENGINE COOLANT : Inspection

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/Gasket

5

5

5

5

5

5

5

5

ENGINE COOLANT : Inspection , Work Flow

Three way catalyst

EGR volume control valve

5

5

5

5

5

5

Work Flow

EGR cooler

5

5

5

5

5

5

Work Flow

Lubrication

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

5

5

5

5

5

5

5

5

Work Flow , OIL PAN (UPPER) : Removal & Installation , OIL PAN (UPPER) : Removal & Installation , OIL PAN (UPPER) : Removal & Installation , OIL PAN (UPPER) : Removal & Installation

Oil level (Low)/Filthy oil

OIL PAN (UPPER) : Removal & Installation

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

OIL PAN (UPPER) : Removal & Installation

Thermostat

5

OIL PAN (UPPER) : Removal & Installation

Water pump

OIL PAN (UPPER) : Removal & Installation

Water gallery

System Description

Cooling fan

5

OIL PAN (UPPER) : Removal & Installation

Coolant level (Low)/Contaminated coolant

OIL PAN (UPPER) : Removal & Installation

NVIS (NISSAN Vehicle Immobilizer System -- NATS)

1

1

OIL PAN (UPPER) : Removal & Installation

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