Subaru 2009 IMPREZA Service Manual page 911

Diagnostic Trouble Code (DTC) Detecting Criteria
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
(1)
(1) Engine control module (ECM)
(2) Accelerator pedal position sensor
1 signal
3. ENABLE CONDITION
Secondary Parameters
Ignition switch
Battery voltage
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(2)
(3)
(3) Accelerator pedal position sensor
2 signal
Enable Conditions
ON
6 V
GD(H4SO)-187
GENERAL DESCRIPTION
(4)
(4) Accelerator pedal position sensor
EN-01861