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 \

Air

Positive crankcase ventilation system

3

3

4

4

4

4

4

4

4

4

1

Inspection 

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

DTC Description

Intake manifold runner control circuit

4

4

DTC Description

DTC Description

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

Inspection 

Ignition signal circuit

1

1

2

2

2

2

2

2

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

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 pressure sensor circuit

4

2

3

DTC Description

Crankshaft position sensor circuit

2

2

DTC Description

Camshaft position sensor circuit

3

2

DTC Description

Vehicle speed signal circuit

2

3

3

3

--

ECM

2

2

3

3

3

3

3

3

3

3

3

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

DTC Description

DTC Description

Exhaust valve timing control solenoid valve circuit

3

2

1

3

2

2

3

3

DTC Description

DTC Description

DTC Description

PNP signal circuit

3

3

3

3

3

DTC Description

Refrigerant pressure sensor circuit

2

3

3

4

Diagnosis Procedure

Electrical load signal circuit

3

Diagnosis Procedure

Air conditioner circuit

2

2

3

3

3

3

3

3

3

3

2

Work Flow (Automatic A/C)

Work Flow (Manual A/C)

ABS actuator and electric unit (control unit)

4

Work Flow (With VDC)

Work Flow (Without VDC)