Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service 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)
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