2005 Subaru Outback i, StandardFACTORY OEM SERVICE PROCEDURE

DTC P0607 Control Module Performance

DTC DETECTING CONDITION: 

TROUBLE SYMPTOM: 

  • Erroneous idling
  • Poor driving performance
CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to , OPERATION , Clear Memory Mode.> and Inspection Mode < Ref. to , PROCEDURE , Inspection Mode.>.

WIRING DIAGRAM: 

Fig 1: DTC P0607 Circuit
G03828498Courtesy of SUBARU OF AMERICA, INC.
DTC P0607 DIAGNOSIS

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

    Connector & terminal 

    (B135) No. 5 (+) - Chassis ground (-): (B135) No. 6 (+) - Chassis ground (-): 

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

    Connector & terminal 

    (B135) No. 5 (+) - Chassis ground (-): (B135) No. 6 (+) - Chassis ground (-): 

 Is the measured value 13 - 15 V? Go to step 3.  Repair the open circuit or ground short of power supply circuit.
3. CHECK GROUND HARNESS OF ECM 

Measure the voltage between ECM connector and ground.

Connector & terminal 

(B137) No. 1 (+) - Chassis ground (-): 

(B137) No. 2 (+) - Chassis ground (-): 

(B137) No. 3 (+) - Chassis ground (-): 

 Is the measured value less than 1 V? Repair poor contact of ECM connector. If poor contact occur, replace the ECM. Retighten the engine ground terminal.
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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.

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