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

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

Inspection 

FRP sensor circuit

1

1

2

2

2

2

2

2

DTC Description

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

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

Ignition

Incorrect ignition timing adjustment

3

3

1

1

1

1

1

1

Work Procedure

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

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

DTC Description

Engine coolant temperature sensor 1 circuit

3

3

3

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

Knock sensor circuit

2

3

DTC Description

Engine oil temperature sensor

4

2

3

DTC Description

Engine oil pressure sensor

4

4

3

3

3

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

DTC Description

Power steering pressure sensor circuit

2

3

3

DTC Description

ECM

2

2

3

3

3

3

3

3

3

3

3

--

Intake valve timing control solenoid valve circuit

3

2

1

3

2

2

3

3

DTC Description

Exhaust valve timing control solenoid valve circuit

3

2

1

3

2

2

3

3

DTC Description

DTC Description

Exhaust valve timing control position sensor

5

5

5

5

5

5

5

5

DTC Description

Exhaust gas temperature sensor

5

DTC Description

DTC Description

VVEL control module

3

4

4

3

DTC Description

DTC Description

VVEL actuator motor

3

4

4

3

DTC Description

VVEL actuator motor relay

3

4

4

3

DTC Description

VVEL control shaft position sensor

3

4

4

3

DTC Description

PNP signal circuit

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

Symptom Table

ABS actuator and electric unit (control unit)

4

Work Flow

Battery current sensor

4

5

5

3

DTC Description

DTC Description

DTC Description

Heated oxygen sensor 2

6

6

6

6

5

DTC Description

DTC Description

Component Inspection (HO2 sensor 2)