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