Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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)