Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 368

GD(H4DOTC)-224

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
At the main IC, check the sent signal at each timing which occurs immediately after the tumble generator

valve output is set to ON → OFF, and judge open NG when the open NG signal is sent 96 ms × 20 time(s)

in a row.

Time Needed for Diagnosis: 96 ms × 20 time(s)

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgment
Judge as OK and clear the NG when the OK signal is sent.

Time Needed for Diagnosis: Less than 1 second

Judgment Value

Malfunction Criteria

Threshold Value

Open NG signal input

Low

Judgment Value

Malfunction Criteria

Threshold Value

Open NG signal input

High

GD(H4DOTC)-225

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

EF:DTC P2012 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK 2)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of tumble generator valve motor.

Judge as NG when the overcurrent signal is sent from IC after tumble generator valve driving IC diagnosis.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

• Abnormality Judgment
At the main IC, check the sent signal at each timing which occurs just before the tumble generator valve out-

put is set to ON → OFF, and judge open NG when the open NG signal is sent 96 ms × 10 time(s) in a row.

Time Needed for Diagnosis: 96 ms × 10 time(s)

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgment
Judge as OK and clear the NG when the OK signal is sent.

Time Needed for Diagnosis: Less than 1 second

(1)

Engine control module (ECM)

(2)

Tumble generator valve

(3)

Battery

Secondary Parameters

Enable Conditions

Battery voltage

≥ 10.9 V

Judgment Value

Malfunction Criteria

Threshold Value

Overcurrent NG signal input

Low

Judgment Value

Malfunction Criteria

Threshold Value

Overcurrent NG signal input

High

EN-01789

E

E

(3)

M

(2)

(1)

GD(H4DOTC)-226

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

EG:DTC P2016 TUMBLE GENERATED VALVE POSITION SENSOR 1 CIRCUIT 

LOW

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)-227

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

< 0.264 V

Judgment Value

Malfunction Criteria

Threshold Value

Output voltage

≥ 0.264 V