DTC P2103: Throttle Actuator "A" Control Motor Circuit HIGH: Notes

DTC detecting condition: 

Immediately at fault recognition

Wiring diagram: 

Engine Electrical System Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK ELECTRONIC THROTTLE CONTROL RELAY. 
   1. Turn the ignition switch to OFF.
   2. Remove the electronic throttle control relay.
   3. Measure the resistance between electronic throttle control relay terminals.

   Terminals 

   No. 14 - No. 15:

   Is the resistance 1 MΩ or more?

   Yes:  Go to  2.

   No:  Replace the electronic throttle control relay. Refer to FUEL INJECTION (FUEL SYSTEMS) (STI)>ELECTRONIC THROTTLE CONTROL RELAY .

2. CHECK SHORT CIRCUIT OF ELECTRONIC THROTTLE CONTROL RELAY POWER SUPPLY. 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between electronic throttle control relay connector and chassis ground.

   Connector & terminal 

   (B225) No. 14 (+) - Chassis ground (-):

   Is the voltage 10 V or more?

   Yes:  Repair the short circuit to power in the harness between ECM connector and electronic throttle control relay connector.

   No:  Go to  3.

3. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL RELAY CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from ECM.
   3. Measure the resistance between ECM connector and chassis ground.

   Connector & terminal 

   (B135) No. 17 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes:  Repair the poor contact of ECM connector.

   No:  Repair the short circuit to ground in harness between ECM connector and electronic throttle control relay connector.