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HOMESERVICE MANUALSTOYOTA20254RUNNER SR5, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM (EXCEPT HEV) - DIAGNOSTIC CODES (P0606-P1378)SFI SYSTEM (FOR GASOLINE MODEL)DTC P0606-09: CONTROL MODULE PROCESSOR (BRAKE OVERRIDE SYSTEM OUTPUT SIGNAL) COMPONENT FAILURE [12/2024 - ]PROCEDURE
2025 Toyota 4Runner SR5, RWD

DTC P0606-09: Control Module Processor (Brake Override System Output Signal) Component Failure [12/2024 - ]: Procedure

2025 Toyota 4Runner SR5, RWDSECTION Procedure
  1. READ OUTPUT DTC 

    Pre-procedure1

    • Perform a confirmation drive. (Refer to confirmation drive in function description)
    • Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      P0606-09 and other DTCs are output A
      P0606-09 is output B

      HINT: 

      If a DTC other than DTC P0606-09 is output, troubleshoot that DTC first.

    Post-procedure1

    • None.

    Result: 

    B 

    REPLACE ECM 

    Refer to REMOVAL [12/2024 - ]

    Result: 

    A 

    See step  2

  2. GO TO DTC CHART 

    HINT: 

    After the inspection, Perform the following procedure.

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2024 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. CLEAR DTC 

    Pre-procedure1

    • None.
    • Clear the DTCs.

      Powertrain > Engine > Clear DTCs 

      Result

      Proceed to
      NEXT

    Post-procedure1

    • Turn the ignition switch off and wait for at least 30 seconds.

    Result: 

    NEXT 

    See step  4

  4. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 

    Pre-procedure1

    • Perform a confirmation drive. (Refer to confirmation drive in function description)
    • Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      P0606-09 is output B

    Post-procedure1

    • None.

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE ECM 

    Refer to REMOVAL [12/2024 - ]

RENDER: 1.0x

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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.