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

WARNING: This page is about a different variant/trim than selected.

Engine Electrical System ENGINE TYPE EJ (WITHOUT PUSH BUTTON START) Ref. to the appropriate SYSTEM WIRING diagram article. ENGINE TYPE EJ (WITHOUT PUSH BUTTON START).
Engine Electrical System ENGINE TYPE EJ (WITH PUSH BUTTON START) Ref. to the appropriate SYSTEM WIRING diagram article. ENGINE TYPE EJ (WITH PUSH BUTTON START).

Fig 1: Engine Electrical System - Wiring Diagram (Engine Type EJ)
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. Turn the ignition switch to OFF. Disconnect the connectors from ECM and electronic throttle control. Measure the resistance between ECM connector and chassis ground. Connector & terminal (B134) No. 19 - Chassis ground: (B134) No. 18 - Chassis ground: (B134) No. 18 - (B136) No. 4:	Is the resistance 1 MΩ or more?	Go to step 2.	Repair the ground short circuit of harness between ECM connector and electronic throttle control connector.
2 CHECK SHORT CIRCUIT INSIDE THE ECM. Connect the connector to ECM. Measure the resistance between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 6 - Engine ground:	Is the resistance 1 MΩ or more?	Replace the electronic throttle control. < Ref. to THROTTLE BODY . >	Repair the ground short circuit of harness between ECM connector and electronic throttle control connector. Replace the ECM if defective. < Ref. to ENGINE CONTROL MODULE (ECM) . >