Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 378

GD(H4DOTC)-264

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.

Details of Judgment Value

Time Needed for Diagnosis: 212 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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: 24 ms

Judgment Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

Within NG range of 

Details of Judgment value

(X1) 2.125 °

(X2) 4.25 °

(X3) 9 °

(X4) 31.625 °

 

 

 

 

 

 

 

 

 

 

(Y1) 5.15 °

(Y2) 6.15 °

(Y3) 8.28 °

(Y4) 10.4 °

(Y5) 12.4 °

 

 

Judgment Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

Within OK range of 

Details of Judgment value

EN-08032

(Y5)

(Y4)

(Y3)

(Y1)

(X1) (X2)

(X3)

(X4)

(Y2)

(OK area)

Throttle position sensor 1 opening angle (˚)

Sensor output
difference (˚)

(NG area)

0

0

GD(H4DOTC)-265

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

FE:DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D”/“E” VOLT-

AGE CORRELATION

1. OUTLINE OF DIAGNOSIS

Judge as NG when the signal level of accelerator pedal position sensor 1 is different from the accelerator

pedal position sensor 2.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 
2 signal

(4)

Accelerator pedal position sensor

(2)

Accelerator pedal position sensor 
1 signal

 

 

 

 

Secondary Parameters

Enable Conditions

Ignition switch

ON

Battery voltage

≥ 6 V

EN-01861

(2)

(3)

(4)

(1)

GD(H4DOTC)-266

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.

Details of Judgment Value

Time Needed for Diagnosis: 116 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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: 116 ms

Judgment Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

Within NG range of 

Details of Judgment value

(X1) 0.6 °

(X2) 1.2 °

(X3) 2 °

(X4) 4 °

 

 

 

 

 

 

 

 

 

 

(Y1) 1.465 °

(Y2) 1.597 °

(Y3) 1.663 °

(Y4) 2.455 °

(Y5) 3.116 °

 

 

Judgment Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

Within OK range of 

Details of Judgment value

EN-08033

0

(Y5)

(Y4)

(Y3)

(Y1)

0

(X1)

(X2)

(X3)

(X4)

(Y2)

(OK area)

Accelerator pedal position sensor 1 opening angle (˚)

Sensor output
difference (˚)

(NG area)

GD(H4DOTC)-267

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

FF:DTC P2195 O2 SENSOR SIGNAL BIASED/STUCK LEAN (BANK 1 SENSOR 1)

1. OUTLINE OF DIAGNOSIS

Detect that λ value remains low.

Judge as NG when lambda value is abnormal in accordance with λ value of front oxygen (A/F) sensor and

running conditions such as vehicle speed, amount of intake air, engine coolant temperature, sub feedback

control, etc.

2. COMPONENT DESCRIPTION

λ value = Actual air fuel ratio/Theoretical 
air fuel ratio
λ > 1: Lean
λ < 1: Rich

(A)

Electromotive force

(B)

Air fuel ratio

(C)

Rich

(D)

Lean

 

 

 

 

 

 

 

 

 

 

(1)

Exhaust gas

(2)

ZrO

2

 

 

EN-09361

(C)

(B)

(D)

(A)

(2)

(1)

(1)