Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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-

tecting Criteria.>

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-

tecting Criteria.>

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-

tecting Criteria.>

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-

tecting Criteria.>

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)