Subaru Legacy IV (2008 year). Service manual - part 221

GD(H4SO)-186

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DM:DTC P2122 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT 

LOW INPUT

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of accelerator pedal position sensor 1.
Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 
2 signal

(4)

Accelerator pedal position sensor

(2)

Accelerator pedal position sensor 
1 signal

 

 

 

Secondary Parameters

Enable Conditions

Ignition switch

ON

Battery voltage

t 6 V

EN-01861

(2)

(3)

(4)

(1)

GD(H4SO)-187

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgement

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 100 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement

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: 100 ms

Judgement Value

Malfunction Criteria

Threshold Value

Sensor 1 input voltage

< 0.217 V

Judgement Value

Malfunction Criteria

Threshold Value

Sensor 1 input voltage

t 0.217 V

GD(H4SO)-188

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

DN:DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT 

HIGH INPUT

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of accelerator pedal position sensor 1.
Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 
2 signal

(4)

Accelerator pedal position sensor

(2)

Accelerator pedal position sensor 
1 signal

 

 

 

Secondary Parameters

Enable Conditions

Ignition switch

ON

Battery voltage

t 6 V

EN-01861

(2)

(3)

(4)

(1)

GD(H4SO)-189

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgement

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 32 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement

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: 32 ms

Judgement Value

Malfunction Criteria

Threshold Value

Sensor 1 input voltage

t 4.783 V

Judgement Value

Malfunction Criteria

Threshold Value

Sensor 1 input voltage

< 4.783 V