HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A0F-238

DTC Code DTC Name
P0A0F-238 Engine Failed to Start

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A0F-238 Engine Failed to Start Engine does not start even though it is being cranked (transaxle input malfunction [engine system])

  • Hybrid vehicle transaxle assembly

  • Transmission input damper assembly

  • Power management control ECU

  • Engine

 Does not come on

Master Warning Light:

Comes on
A01SFHWE05

CAUTION / NOTICE / HINT

Tech Tips

If this DTC is output, the engine or transaxle gear may be seized. Be sure to check the level of the engine oil, automatic transmission fluid (ATF) and coolant before inspection.

PROCEDURE


  1. 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.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P0A0F-238 only is output. A
      P0A1D (Hybrid Powertrain Control Module) is output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK CRANKSHAFT PULLEY REVOLUTION (PARK (P) SELECTED)


    1. Make sure that park (P) is selected.

    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

    NG

    GO TO STEP 8 Click here

    OK

  3. CLEAR DTC


    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.


      Powertrain > Hybrid Control > Trouble Codes

    5. Clear the DTCs and freeze frame data.


      Powertrain > Hybrid Control > Clear DTCs

    6. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

  4. 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.


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

    4. Read the Data List.

    5. A01SFMRE05
      *1 Malfunction
      *2 Normal
      *3 Engine

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

      OK
      Generator (MG1) Rev increases to approximately 3.6 times that of Engine Revolution.

      Tech Tips

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

      Data List Engine Rev MG1 Rev
      Reference Value Approximately 1000 rpm Approximately 3600 rpm
      Approximately 1500 rpm Approximately 5400 rpm
      Approximately 2500 rpm Approximately 9000 rpm

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  5. 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

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  6. 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.


      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 to accelerate the vehicle from a stop.

      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 + 0.27 X Motor (MG2) Revolution is 500 rpm or more and it is maintained for 1 second.

    7. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY Click here

    OK

  7. SIMULATION TEST


    1. Perform step 2 and steps 4 through 6 again.

      Result
      Result Proceed to
      Malfunction is not reproduced. A
      Malfunction is not reproduced in step 2. B
      Malfunction is not reproduced in step 4 or 5. C
      Malfunction is not reproduced in step 6. D
      OK
      The problem symptom is not reproduced.

    A

    REPLACE POWER MANAGEMENT CONTROL ECU for LHD: Click here
    REPLACE POWER MANAGEMENT CONTROL ECU for RHD: Click here

    C

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    D

    REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY Click here

    B

  8. CHECK CRANKSHAFT PULLEY REVOLUTION (SHIFT LEVER IN N)


    1. Lift up the vehicle.

    2. Turn the power switch on (IG).

    3. Move the shift lever to N.

    4. 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 on (IG) 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.

    5. Turn the power switch off.

    6. Lower the vehicle.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    NG

    REPAIR OR REPLACE ENGINE