Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 372

GD(H4DOTC)-240

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 1 s × 1 time(s)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-

cles.
• Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more

than the predetermined time.

Time Needed for Diagnosis: 1 s

Judgment Value

Malfunction Criteria

Threshold Value

Sub feedback learning value

< –0.024  (Models without SI-DRIVE)
< –0.037  (Models with SI-DRIVE)

Judgment Value

Malfunction Criteria

Threshold Value

Sub feedback learning value

≥ –0.024  + 0.004  (Models without SI-DRIVE)

≥ –0.037  + 0  (Models with SI-DRIVE)

GD(H4DOTC)-241

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

ET:DTC P2097 POST CATALYST FUEL TRIM SYSTEM TOO RICH (BANK 1)

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of fuel system from the size of the sub feedback learning value.

Sub feedback learning is being performed. When the learning value goes to the rich side, judge as NG.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously when the vehicle is idling or running at a constant speed of 80 km/h (50

MPH) or more.

(A)

Electromotive force

(B)

Air fuel ratio

(C)

Lean

(D)

Rich

(E)

Theoretical air fuel ratio

(F)

Comparative voltage

 

 

 

 

 

 

(1)

Atmosphere

(2)

Exhaust gas

(3)

Electromotive force

Secondary Parameters

Enable Conditions

Conditions for carrying out the sub feedback learning

Completed

Continuous time when all conditions are established.

≥ 1 s

EN-01696

(3)

V

(1)

(2)

(2)

(E)

(F)

(C)

(B)

(D)

(A)

GD(H4DOTC)-242

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 1 s × 1 time(s)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-

cles.
• Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more

than the predetermined time.

Time Needed for Diagnosis: 1 s

Judgment Value

Malfunction Criteria

Threshold Value

Sub feedback learning value

≥ 0.028  (Models without SI-DRIVE)

≥ 0.023  (Models with SI-DRIVE)

Judgment Value

Malfunction Criteria

Threshold Value

Sub feedback learning value

< 0.028  + –0.01  (Models without SI-DRIVE)
< 0.023  + 0  (Models with SI-DRIVE)

GD(H4DOTC)-243

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

EU:DTC P2101 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/

PERFORMANCE

1. OUTLINE OF DIAGNOSIS

Judge as NG when the motor current becomes large or drive circuit is heated.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(4)

Drive circuit

(6)

Electronic throttle control relay

(2)

Detecting circuit

(5)

Temperature detection circuit

(7)

Motor

(3)

Overcurrent detection circuit

 

 

 

 

Secondary Parameters

Enable Conditions

Under control of electronic throttle control

ON

CPU communication line sub → main normal judgment Normal

EN-01867

(3)

(2)

(5)

(2)

(4)

(1)

(6)

(7)

12V

12V