Wiring Diagram:

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

Fig 1: Wiring Diagram - DTC P2103 Throttle Actuator Control Motor Circuit High

G03829089

Courtesy of SUBARU OF AMERICA, INC.

DTC P2103 DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1. CHECK ELECTRONIC THROTTLE CONTROL RELAY. Turn the ignition switch to OFF. Remove the electronic throttle control relay. Measure the resistance between electronic throttle control relay terminals. Terminals No. 7 - No. 8:	Is the resistance more than 1 MΩ?	Go to step 2.	Replace the electronic throttle control relay.
2. CHECK SHORT OF ELECTRONIC THROTTLE CONTROL RELAY POWER SUPPLY CIRCUIT. Turn the ignition switch to ON. Measure the voltage between electronic throttle control relay connector and chassis ground. Connector & terminal (B362) 8 (+) - Chassis ground (-):	Is the voltage more than 5 V?	Go to step 3.	Repair the short of power supply to harness between ECM and electronic throttle control relay.
3. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL RELAY. Turn the ignition switch to OFF. Disconnect the connectors from ECM. Measure the resistance between ECM connector and engine ground. Connector & terminal (B135) 35 - Engine ground:	Is the resistance more than 1 MΩ?	Repair the poor contact in ECM connector. If problem persists, replace the ECM.	Repair the ground short of harness between ECM and electronic throttle control relay.