DTC P0223 Throttle/Pedal Position Sensor/Switch "B" Circuit High: Wiring Diagram

Fig 1: Throttle/Pedal Position Sensor/Switch "B" Circuit High - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connectors from ECM and electronic throttle control. Measure the resistance of harness between ECM and electronic throttle control connector. Connector & terminal (B134) No. 28 - (E57) No. 4: (B134) No. 29 - (E57) No. 3:	Is the resistance less than 1 Ω?	Go to step 2.	Repair the open circuit of harness between ECM and electronic throttle control connector.
2 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Connect the ECM. Measure the resistance between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 3 - Engine ground:	Is the resistance less than 5 Ω?	Go to step 3.	Contact your SOA service center.
3 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to ON. Measure the voltage between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 4 (+) - Engine ground (-):	Is the voltage 4.85 V or more?	Repair the short circuit to power in the harness between ECM and electronic throttle control connector.	Go to step 4.
4 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connectors from the ECM. Measure the resistance between ECM connectors. Connector & terminal (B134) No. 19 - (B134) No. 28:	Is the resistance 1 MΩ or more?	Repair poor contact of the electronic throttle control connector. Replace the electronic throttle control if defective. <Ref. to THROTTLE BODY . >	Repair the short circuit to power in the harness between ECM and electronic throttle control connector.