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

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

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