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DTC C1A40: ENG / EHV Device [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTCs (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    5. Check for DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC is output B
    6. Turn the power switch off.

    B → See step   8 

    A: Go to next step 

  2. CHECK FOR DTCs (ENGINE AND ECT) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Check for DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC is output B
    6. Turn the power switch off.

    B → See step   10 

    A: Go to next step 

  3. CHECK FOR DTCs (DTC C1A40) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).
      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Check for DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC C1A40 is output B
    7. Turn the power switch off.

    B → See step   4 

    A → END 

  4. REPLACE POWER MANAGEMENT CONTROL ECU 

    Refer to REMOVAL [08/2013 - ]

    NEXT: Go to next step 

  5. CHECK FOR DTCs (DTC C1A40) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).
      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Check for DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC C1A40 is output B
    7. Turn the power switch off.

    B → See step   6 

    A → END 

  6. REPLACE ECM 

    Refer to REMOVAL [08/2013 - ]

    NEXT: Go to next step 

  7. CHECK FOR DTCs (DTC C1A40) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).
      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Check for DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC C1A40 is output B
    7. Turn the power switch off.

    B → See step   9 

    A → END 

  8. GO TO HYBRID CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 
  9. REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
  10. GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ] 
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