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Home >> Toyota >> 2012 >> Prius Two >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System (Except Plug-In) (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC C1A40: ENG / EHV Device >> Procedure
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DTC C1A40: ENG / EHV Device: Procedure

  1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM) 
    1. Check DTCs for the hybrid control system. Refer to DTC CHECK / CLEAR .

      OK

      Hybrid control system DTC is not output.

    NG → See step   5 

    OK: Go to next step 

  2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM) 
    1. Check DTCs for engine control system. Refer to DTC CHECK / CLEAR .

      OK

      Engine control system DTC is not output.

    NG → See step   6 

    OK: Go to next step 

  3. REPLACE POWER MANAGEMENT CONTROL ECU 
    1. Replace the power management control ECU. Refer to REMOVAL .

    NEXT: Go to next step 

  4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) 
    1. Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    3. Check for DTCs.

      OK

      DTC C1A40 is not output.

    NG → See step   7 

    OK → END 

  5. GO TO HYBRID CONTROL SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  6. GO TO ENGINE CONTROL SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  7. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL