Nissan Sentra B18 (2020-2025) Service Manual: Engine Control System

Fuel

Fuel pump circuit

1

1

2

3

2

2

2

3

2

Component Function Check

Fuel pressure regulator system

3

3

4

4

4

4

4

4

4

4

Work Procedure

Fuel injector circuit

1

1

2

3

2

2

2

2

Component Function Check

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

System Description

Fuel rail pressure sensor circuit

1

1

2

2

2

2

2

2

DTC Description

High pressure fuel pump circuit

4

3

Component Function Check

Air

Positive crankcase ventilation system

3

3

4

4

4

4

4

4

4

4

1

POSITIVE CRANKCASE VENTILATION : Periodic Maintenance

Incorrect idle speed adjustment

1

1

1

1

1

IDLE SPEED : Periodic Maintenance

Electric throttle control actuator

1

1

2

3

3

2

2

2

2

2

2

DTC Description,

DTC Description

Intake manifold runner control valve circuit

4

4

DTC Description

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

IGNITION TIMING : Periodic Maintenance

Ignition circuit

1

1

2

2

2

2

2

2

Component Function Check

Main power supply and ground circuit

2

2

3

3

3

3

3

2

3

Diagnosis Procedure

Main power supply and ground circuit

1

1

2

2

2

2

2

2

Diagnosis Procedure

Engine coolant temperature sensor circuit

3

3

3

DTC Description

Air fuel ratio (A/F) sensor 1 circuit

DTC Description,

DTC Description,

DTC Description

Throttle position sensor circuit

2

2

DTC Description,

DTC Description,

DTC Description,

DTC Description,

DTC Description,

Accelerator pedal position sensor circuit

3

2

1

DTC Description,

DTC Description,

DTC Description

Knock sensor circuit

2

3

DTC Description

Engine oil temperature sensor circuit

4

2

3

DTC Description

Crankshaft position sensor circuit

2

2

DTC Description

Intake camshaft position sensor circuit

3

2

DTC Description

Nissan Sentra Vehicle speed signal circuit

2

3

3

3

DTC Description

ECM

2

2

3

3

3

3

3

3

3

3

3

DTC Description

Electric intake valve timing control module circuit

3

3

3

DTC Description,

DTC Description

Electric intake valve timing control actuator circuit

3

DTC Description,

DTC Description

Exhaust valve timing control solenoid valve circuit

3

2

1

3

2

2

3

3

DTC Description,

DTC Description

Exhaust camshaft position sensor circuit

5

5

5

5

5

5

5

5

DTC Description

Transmission range switch

3

3

3

3

3

DTC Description

Refrigerant pressure sensor circuit

2

3

3

4

Component Function Check

Electrical load signal circuit

3

Component Function Check

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

Work Flow(Automatic air conditioner),

Work Flow(Manual air conditioner)

ABS actuator and electric unit (control unit)

4

Work Flow

Fuel

Fuel tank

5

5

Inspection

Fuel piping

5

5

5

5

5

5

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

Inspection

Air cleaner

Inspection

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

—

Cranking

Battery

1

1

1

1

1

1

1

1

Work Flow (With 165-DSS-5000P)(With 165-DSS-5000P),

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

Generator circuit

Work Flow (With 165-DSS-5000P)(With 165-DSS-5000P),

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

Starter circuit

3

Work Flow (With 165-DSS-5000P)(With 165-DSS-5000P),

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

Signal plate

6

Inspection

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

Component Inspection

Exhaust valve timing control

Component Inspection

Intake valve

3

Inspection

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/Gasket

5

5

5

5

5

5

5

5

Inspection,

Inspection

Three way catalyst

Lubrication

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

5

5

5

5

5

5

5

5

Inspection,

Inspection,

Inspection

Oil level (Low)/Filthy oil

Inspection

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

Inspection,

Inspection

Thermostat

5

Inspection

Water pump

Exploded View

Water gallery

Inspection

Cooling fan

5

Exploded View

Coolant level (Low)/Contaminated coolant

Inspection