Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 371
GD(H4DOTC)-236
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EM:DTC P2090 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-
CUIT 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)-237
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EN:DTC P2091 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-
CUIT 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 control solenoid valve – oil flow
control solenoid valve control current value|
< 0.08 A
GD(H4DOTC)-238
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EO:DTC P2092 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT
LOW (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P2088. <Ref. to GD(H4DOTC)-234, DTC P2088 INTAKE CAM-
SHAFT POSITION ACTUATOR CONTROL CIRCUIT LOW (BANK 1), Diagnostic Trouble Code (DTC) De-
EP:DTC P2093 INTAKE CAMSHAFT POSITION ACTUATOR CONTROL CIRCUIT
HIGH (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P2089. <Ref. to GD(H4DOTC)-235, DTC P2089 INTAKE CAM-
SHAFT POSITION ACTUATOR CONTROL CIRCUIT HIGH (BANK 1), Diagnostic Trouble Code (DTC) De-
EQ:DTC P2094 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-
CUIT LOW (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P2090. <Ref. to GD(H4DOTC)-236, DTC P2090 EXHAUST CAM-
SHAFT POSITION ACTUATOR CONTROL CIRCUIT LOW (BANK 1), Diagnostic Trouble Code (DTC) De-
ER:DTC P2095 EXHAUST CAMSHAFT POSITION ACTUATOR CONTROL CIR-
CUIT HIGH (BANK 2)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P2091. <Ref. to GD(H4DOTC)-237, DTC P2091 EXHAUST CAM-
SHAFT POSITION ACTUATOR CONTROL CIRCUIT HIGH (BANK 1), Diagnostic Trouble Code (DTC) De-
GD(H4DOTC)-239
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
ES:DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel system from the size of the sub feedback learning value.
Control the sub feedback learning and judge as NG when the learning value is in the lean zone.
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)
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