Wiring Diagram:

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

Fig 1: Wiring Diagram - DTC P0223 Throttle/Pedal Position Sensor/Switch

G03829036

Courtesy of SUBARU OF AMERICA, INC.

DTC P0223 DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1. CHECK OUTPUT VOLTAGE OF SENSOR. Turn the ignition switch to ON. Read the data of sub throttle sensor signals, using the Subaru Select Monitor. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to , SUBARU SELECT MONITOR . >	Is the measured value less than 4.73 V?	Go to step 2.	Go to step 3.
2. CHECK POOR CONTACT IN CONNECTORS. Check poor contact in connectors between ECM and electronic throttle control.	Is there poor contact in the connectors between ECM and electronic throttle control?	Repair the poor contact in connectors.	Connector has returned to a normal condition at this time. A temporary poor contact of the connector may be the cause.
3. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connectors from ECM. Disconnect the connectors from electronic throttle control. Measure the resistance between ECM connector and electronic throttle control connector. Connector & terminal (B136) No. 35 - (E57) No. 3: (B136) 29 - (E57) No. 4:	Is the measured value less than 1 Ω?	Go to step 4.	Repair the open circuit of harness connector.
4. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Connect the ECM connector. Measure the resistance between the electronic throttle control connector and engine ground. Connector & terminal (E57) 3 - Engine ground:	Is the measured value less than 5 Ω?	Go to step 5.	Repair the poor contact in ECM connector. If the problem persists, replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . >
5. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Measure the voltage between the electronic throttle control connector and engine ground. Connector & terminal (E57) No. 4 (+) - Engine ground (-):	Is the measured value less than 10 V?	Go to step 6.	Repair the short of harness between ECM connector and electronic throttle control connector.
6. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connector from ECM. Measure the voltage between connectors. Connector & terminal (B136) 29 - (B136) No. 16:	Is the measured value more than 1 MΩ?	Repair the poor contact in electronic throttle control connector. If problem persists, replace the electronic throttle control.	Short circuit of sensor power supply may be the cause.