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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE CONTROL SYSTEM (DIAGNOSTICS) (H4DOTC))DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P0606: CONTROL MODULE PROCESSORWIRING DIAGRAM
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

DTC P0606: Control Module Processor: Wiring Diagram

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Wiring Diagram
WARNING: This page is about a different variant/trim than selected.
  • Engine electrical system turbo engine model (without push button start) < Ref. to TURBO MODEL (WITHOUT PUSH BUTTON START) , WIRING DIAGRAM, Engine Electrical System. >
  • Engine electrical system turbo engine model (with push button start) < Ref. to TURBO MODEL (WITH PUSH BUTTON START) , WIRING DIAGRAM, Engine Electrical System. >
    Fig 1: Control Module Wiring Diagram
    G09480956Courtesy of SUBARU OF AMERICA, INC.
DTC PROCEDURE

Step Check Yes No
1 CHECK INPUT VOLTAGE OF ECM. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between ECM and engine ground.

    Connector & terminal 

    (B134) No. 12 (+) - Engine ground (-): 

    (B134) No. 24 (+) - Engine ground (-): 

 Is the voltage 10 - 13 V? Go to step 2  . Repair the open or ground short circuit of power supply circuit.
2 CHECK INPUT VOLTAGE OF ECM. 
  1. Start the engine.
  2. Measure the voltage between ECM and engine ground.

    Connector & terminal 

    (B134) No. 12 (+) - Engine ground (-): 

    (B134) No. 24 (+) - Engine ground (-): 

 Is the voltage 13 - 15 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 CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from ECM and electronic throttle control.
  3. Measure the resistance of harness between ECM and electronic throttle control connector.

    Connector & terminal 

    (E158) No. 18 - (E57) No. 2: 

    (E158) No. 30 - (E57) No. 3: 

 Is the resistance less than 1 Ω? Go to step 4  . Repair the open circuit of harness between ECM and electronic throttle control connector.
4 CHECK ECM GROUND HARNESS. 
  1. Connect all connectors.
  2. Turn the ignition to ON.
  3. Measure the voltage between ECM and engine ground.

    Connector & terminal 

    (B134) No. 35 - Engine ground: 

    (B134) No. 47 - Engine ground: 

    (E159) No. 10 - Engine ground: 

    (E159) No. 17 - Engine ground: 

    (E159) No. 18 - Engine ground: 

    (E159) No. 25 - Engine ground: 

    (E159) No. 26 - Engine ground: 

 Is the voltage less than 1 V? Repair the poor contact of ECM connector. Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Open circuit in ground circuit
  • Loose engine ground terminal
  • Poor contact of coupling connector
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.