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HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A0F-238

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DTC Code DTC Name
P0A0F-238 Engine Failed to Start
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DESCRIPTION

If the hybrid vehicle control ECU assembly detects that the engine or transmission gear has seized, the hybrid vehicle control ECU assembly will perform fail-safe control. Also, if a substance or object is preventing the engine or transmission internal components from rotating, the hybrid vehicle control ECU assembly will perform fail-safe control.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A0F-238 Engine Failed to Start

The engine does not start even though it is being cranked (transmission input circuit malfunction (engine system))

(1 trip detection logic)

  • Hybrid vehicle transmission assembly

  • Transmission input damper assembly

  • Hybrid vehicle control ECU assembly

  • Engine

 Does not come on

Master Warning Light:

Comes on
Table 1. Related Data List
DTC No. ECU Data List
P0A0F-238

  • Vehicle Spd

  • Engine Revolution

  • Generator(MG1) Torq

  • Generator(MG1) Rev

  • Motor(MG2) Revolution
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CAUTION / NOTICE / HINT

Tip:

  • A seized engine, mechanical malfunction of the hybrid vehicle transmission can be suspected.

  • If this DTC is output, the engine or gears in the transmission may have seized or foreign objects have been caught in either of them. Therefore, check the engine oil, ATF and coolant levels.

  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. While driving the vehicle at a speed of 20 km/h or more in EV mode, depress the accelerator pedal to start the engine, and drive the vehicle for 3 seconds or more.*1


      • *1: When the HV system is normal, the engine starts when the accelerator pedal is depressed halfway or more. If the HV system is malfunctioning, the engine may not start. Even in this case, drive the vehicle at a speed of 20 km/h or more in EV mode for 3 seconds or more.

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PROCEDURE


  1. Click here

    CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.


      1. Powertrain > Hybrid Control > Trouble Codes


      Result
      Result Proceed to
      Only DTC P0A0F-238 is output or any DTCs other than P0A1D (Hybrid Powertrain Control Module) are also output. A
      P0A1D (Hybrid Powertrain Control Module) is output. B

    5. Turn the power switch off.


  2. Click here

    CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)


    1. Check that the shift lever is in P.

    2. Lift up the vehicle.

    3. Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

      CAUTION:

      Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

      Note:

      Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

      OK
      The crankshaft rotates smoothly.

    4. Lower the vehicle.

      Result
      Proceed to
      OK
      NG

  3. Click here

    CLEAR DTC

    Result
    Proceed to
    NEXT

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Read and record the DTCs and freeze frame data.


      1. Powertrain > Hybrid Control > Trouble Codes


    5. Clear the DTCs and freeze frame data.


      1. Powertrain > Hybrid Control > Clear DTCs


    6. Turn the power switch off.

      Result
      Proceed to
      NEXT

  4. Click here

    CHECK ENGINE RACING


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Generator (MG1) Rev, Engine Revolution.


      1. Powertrain > Hybrid Control > Data List
        Tester Display
        Engine Revolution
        Generator(MG1) Rev





    4. Read the Data List.

    5. A01MSVRE05

      While the READY indicator is on, depress the accelerator pedal for 10 seconds.

      OK
      The engine races
      Tip:

      • If the engine does not race and DTC P3147-239 (Transmission system) is output or generator (MG1) operates but the engine does not crank, replace the hybrid vehicle transmission assembly.

      • Refer to the graph for Data List confirmation of "Generator (MG1) Rev" and " Engine Revolution".

      Data List Engine Rev Generator (MG1) Rev
      Reference Value Approximately 900 rpm Approximately 3200 rpm
      Approximately 1500 rpm Approximately 5400 rpm

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK CREEP MOVEMENT


    1. Turn the power switch on (READY).

    2. Depress the brake pedal, move the shift lever to D, and release the brake pedal.

      OK
      The wheels turn (the vehicle creeps forward).

    3. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

  6. Click here

    INSPECT ENGINE SPEED


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor (MG2) Revolution, Generator (MG1) Rev, Engine Revolution.


      1. Powertrain > Hybrid Control > Data List
        Tester Display
        Engine Revolution
        Motor(MG2) Revolution
        Generator(MG1) Rev






    4. Read the Data List.

    5. Move the shift lever to D.

    6. Fully depress the accelerator pedal when the vehicle speed is 10 km/h or more.

      Note:

      Perform this test only in an appropriate safe location, in accordance with all local laws.

      OK
      The difference between "Engine Revolution" and "0.28 X Generator (MG1) Rev + 0.22 X Motor (MG2) Revolution" is 500 rpm or more and it is maintained for 1 second.
      Tip:

      If the engine races or DTC P3147-241 (Transmission system) is output, replace the transmission input damper assembly.

    7. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLYClick here

    • NG

      REPLACE TRANSMISSION INPUT DAMPER ASSEMBLYClick here

  7. Click here

    CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)


    1. Lift up the vehicle.

    2. Move the shift lever to N.

    3. Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

      CAUTION:

      Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

      Note:

      Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

      OK
      The crankshaft rotates smoothly.

    4. Lower the vehicle.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE ENGINE