Wiring Diagram:

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

Fig 1: Wiring Diagram - DTC P2102 Throttle Actuator Control Motor Circuit Low

G03830059

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE (DTC P2102)

Step		Check	Yes	No
1 CHECK ELECTRONIC THROTTLE CONTROL RELAY. Turn the ignition switch to OFF. Remove the electronic throttle control relay. Connect the battery to terminals No. 5 and No. 6 of electronic throttle control relay. Measure the resistance between electronic throttle control terminals. Terminals (B362) No. 7 - (B362) No. 8:		Is the resistance less than 1 ?	Go to step 2.	Replace the electronic throttle control relay.
2 CHECK POWER SUPPLY OF ELECTRONIC THROTTLE CONTROL RELAY. Measure the voltage between electronic throttle control relay connector and chassis ground. Connector & terminal (B362) No. 7 (+) - Chassis ground (-): (B362) No. 6 (+) - Chassis ground (-):		Is the voltage more than 5 V?	Go to step 3.	Repair the open or ground short circuit of power supply circuit.
3 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL RELAY. Disconnect the connector from ECM. Turn the ignition switch to ON. Measure the voltage between electronic throttle control relay connector and chassis ground. Connector & terminal (B362) No. 5 (+) - Chassis ground (-):		Is the voltage less than 5 V?	Go to step 4.	Repair power supply short circuit in harness between ECM and electronic throttle control relay.
4 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL RELAY. Turn the ignition switch to OFF. Measure the resistance between electronic throttle control relay connector and chassis ground. Connector & terminal (B362) No. 5 - Chassis ground: (B362) No. 8 - Chassis ground:		Is the resistance more than 1 M?	Go to step 5.	Repair the ground short circuit in harness between ECM and electronic throttle control relay.
5 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL RELAY. Measure the resistance between ECM connector and electronic throttle control relay connector. Connector & terminal (B135) No. 35 - (B362) No. 5: (B137) No. 6 - (B362) No. 8:		Is the resistance less than 1 ?	Repair the poor contact in ECM connector. Replace the ECM if defective. < Ref. to ENGINE CONTROL MODULE (ECM) . >	Repair the open circuit in harness between ECM and electronic throttle control relay.