Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 338
GD(H4DOTC)-104
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BH:DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH “B” CIRCUIT
HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of throttle position sensor 2.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
(1)
Throttle position sensor 1 signal
(3)
Throttle position sensor
(4)
Engine control module (ECM)
(2)
Throttle position sensor 2 signal
Secondary Parameters
Enable Conditions
Ignition switch
ON
Battery voltage
≥ 6 V
EN-01859
(1)
(2)
(3)
(4)
GD(H4DOTC)-105
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
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: 24 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
Sensor 2 input voltage
≥ 4.858 V
Judgment Value
Malfunction Criteria
Threshold Value
Sensor 2 input voltage
< 4.858 V
GD(H4DOTC)-106
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BI: DTC P0230 FUEL PUMP PRIMARY CIRCUIT
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel pump control unit.
Judge as NG when the NG signal is sent through a diagnostic line coming from the fuel pump control unit.
Fuel pump control unit detects the open or short circuit malfunction for each line, and then sends NG signals
if one of them is found NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Engine control module (ECM)
(3)
Fuel pump
(4)
Battery
(2)
Fuel pump control unit
Secondary Parameters
Enable Conditions
None
EN-01771
E
E
(3)
(4)
(2)
FPC
DI
FP+
FP-
+B
(1)
GD(H4DOTC)-107
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: 2500 ms
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: Less than 1 second
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 8 V
Elapsed time after starting the engine
≥ 180000 ms
Fuel pump control
ON
Fuel pump control unit output diagnosis signal
Low
Fuel level
≥ 10 2 (2.64 US gal, 2.2 Imp gal)
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 8 V
Elapsed time after starting the engine
≥ 180000 ms
Fuel pump control
ON
Fuel pump control unit output diagnosis signal
High
Fuel level
≥ 10 2 (2.64 US gal, 2.2 Imp gal)
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