2006 Subaru B9 Tribeca BaseFACTORY 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, perform Clear Memory Mode < Refer to OPERATION , CLEAR MEMORY MODE > and Inspection Mode < Refer to PROCEDURE , INSPECTION MODE >.

WIRING DIAGRAM: 

Fig 1: Engine Control Module (ECM) - Wiring Diagram
G05031693Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC CHART

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

    Connector & terminal 

    (B134) No. 7 (+) - Chassis ground (-): 

    (B135) No. 2 (+) - Chassis 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 FROM ECM. 
  1. Start the engine.
  2. Measure the voltage between ECM connector and chassis ground.

    Connector & terminal 

    (B134) No. 7 (+) - Chassis ground (-): 

    (B135) No. 2 (+) - Chassis ground (-): 

 Is the voltage 13 - 15 V? Go to step 3.  Repair the open or ground short circuit of power supply circuit.
3 CHECK ECM GROUND HARNESS. 
Measure the voltage between ECM connector and chassis ground.

Connector & terminal 

(B134) No. 3 (+) - Chassis ground (-): 

(B134) No. 5 (+) - Chassis ground (-): 

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

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

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

(B137) No. 7 (+) - Chassis ground (-): 

 Is the voltage less than 1 V? Repair poor contact in ECM connector. Replace the ECM if defective. < Refer to ENGINE CONTROL MODULE (ECM) . > Further tighten 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.