DTC P0122: Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input

OUTLINE OF DIAGNOSIS
Detect the open or short circuit of throttle position sensor 1.

Judge NG when out of the standard value.
COMPONENT DESCRIPTION

Fig 1: Throttle/Pedal Position Sensor/Switch Circuit Diagram (Low Input)
Courtesy of SUBARU OF AMERICA, INC.

ENABLE CONDITION

ENABLE CONDITION CHART

Secondary Parameters	Enable Conditions
Ignition switch	ON

DIAGNOSTIC METHOD

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

JUDGMENT VALUE CHART

Malfunction Criteria	Threshold Value
Sensor 1 input voltage	"GREATER THAN EQUAL TO" 0.309 V

Time Needed for Diagnosis: 24 milliseconds

Malfunction Indicator Light Illumination: Illuminates as soon as malfunction occurs.

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed (Only engine stop)
MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed (Only engine stop)
FAIL SAFE
Stop power distribution to electric control throttle motor. (Throttle opening is fixed to 6°p.)
ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)