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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Control System (Diagnostics) (P2101 To U171F) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2103 Throttle Actuator "A" Control Motor Circuit High >> Notes

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

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

DTC detecting condition: 

Immediately at fault recognition

CAUTION:

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

Fig 1: Engine Electrical System Wiring Diagram (Throttle Actuator Control Motor Circuit High)
G11270416Courtesy 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? 

  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 

      (B134) No. 65 - 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.