System - Basic Engine Control System

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

Low pressure 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

Component Function Check

Fuel injector circuit

1

1

2

3

2

2

2

2

Component Function Check

Fuel rail pressure sensor circuit

1

1

2

2

2

2

2

2

DTC Description

High pressure fuel pump circuit

4

3

DTC Diagnosis Procedure

Evaporative emission system

3

3

4

4

4

4

4

4

4

4

EVAPORATIVE EMISSION SYSTEM : Inspection 

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

Work Procedure

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

System Description

EGR

EGR volume control valve circuit

2

2

3

3

3

2

2

3

3

DTC Diagnosis Procedure

EGR system

2

1

DTC Diagnosis Procedure

DTC Diagnosis Procedure

Main power supply and ground circuit

2

2

3

3

3

3

3

2

3

Diagnosis Procedure

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

DTC Description , DTC Description

Intake air temperature sensor circuit

DTC Diagnosis Procedure , DTC Diagnosis Procedure

Engine coolant temperature sensor circuit

3

3

3

DTC Description , DTC Description

Air fuel ratio (A/F) sensor 1 circuit

DTC Description , DTC Description , 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

Heated oxygen sensor 2 circuit

6

6

6

6

5

DTC Description , DTC Diagnosis Procedure , DTC Diagnosis Procedure

Knock sensor circuit

2

3

DTC Description

Engine oil temperature sensor circuit

4

2

3

DTC Diagnosis Procedure , DTC Diagnosis Procedure

Engine oil pressure sensor circuit

4

4

3

3

3

3

DTC Diagnosis Procedure , DTC Diagnosis Procedure

Crankshaft position sensor circuit

2

2

DTC Description

Intake camshaft position sensor circuit

3

2

DTC Description

Vehicle speed signal circuit

2

3

3

3

DTC Description

ECM

2

2

3

3

3

3

3

3

3

3

3

DTC Description , DTC Description

Electric Intake valve timing control module circuit

3

3

3

Diagnosis Procedure ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description

Electric intake valve timing control actuator circuit

3

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description ,

DTC Description

Exhaust valve timing intermediate lock control solenoid valve circuit

DTC Description , DTC Description

Exhaust camshaft position sensor circuit

5

5

5

5

5

5

5

5

DTC Description

PNP signal circuit

3

3

3

3

3

ENGINE OIL : Inspection

Refrigerant pressure sensor circuit

2

3

3

4

ENGINE OIL : Inspection

Electrical load signal circuit

3

Component Function Check

Intake manifold runner control valve motor circuit

4

4

ENGINE OIL : Inspection

Intake manifold runner control valve position sensor circuit

4

4

DTC Description

Intake manifold tuning valve circuit

1

ENGINE OIL : Inspection

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

ENGINE OIL : Inspection , ENGINE OIL : Inspection

Battery current sensor circuit

4

5

5

3

ENGINE OIL : Inspection , ENGINE OIL : Inspection , ENGINE OIL : Inspection , ENGINE OIL : Inspection

Battery temperature sensor circuit

4

5

5

3

DTC Diagnosis Procedure

ASCD steering switch circuit

DTC Diagnosis Procedure

ABS actuator and electric unit (control unit)

4

DTC Diagnosis Procedure , DTC Diagnosis Procedure