Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 370
GD(H4DOTC)-232
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EJ:DTC P2022 TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT
HIGH
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of tumble generator valve position sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Rotor
(3)
Voltage (V)
(4)
Tumble generator valve opening
(°)
(2)
Return spring
Secondary Parameters
Enable Conditions
None
EN-01768
(3)
(4)
(1)
(2)
GD(H4DOTC)-233
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: 500 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: Less than 1 second
Judgment Value
Malfunction Criteria
Threshold Value
Output voltage
≥ 4.783 V
Judgment Value
Malfunction Criteria
Threshold Value
Output voltage
< 4.783 V
GD(H4DOTC)-234
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EK:DTC P2088 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT
LOW (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the oil flow control solenoid valve.
Judge as NG when the current is small even though the duty signal is large.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. 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: 2000 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: 2000 ms
Secondary Parameters
Enable Conditions
None
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 10.9 V
Oil flow control solenoid valve control duty
≥ 99.61 %
Oil control solenoid valve control present current
< 0.306 A
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 10.9 V
Target current value of the oil flow control solenoid valve
≥ 0.14 A
|Target current value of the oil flow control solenoid valve –
oil flow control solenoid valve control current value|
< 0.08 A
GD(H4DOTC)-235
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EL:DTC P2089 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT
HIGH (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of oil flow control solenoid valve.
Judge as NG when the current is large even though the duty signal is small.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. 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: 2000 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: 2000 ms
Secondary Parameters
Enable Conditions
None
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 10.9 V
Oil flow control solenoid valve control
duty
< 0.39 %
Oil control solenoid valve control present
current
≥ 0.306 A
Judgment Value
Malfunction Criteria
Threshold Value
Battery voltage
≥ 10.9 V
|Target current value of the oil flow con-
trol solenoid valve – oil flow control sole-
noid valve control current value|
< 0.08 A
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