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

DTC No. INF Code DTC Detection Condition Trouble Area
P0A0F 238 Engine does not start even though it is being cranked (transmission input malfunction [engine system])

  • Hybrid vehicle transmission assembly

  • Power management control ECU

  • Engine
A01FTQTE01

INSPECTION PROCEDURE

Tech Tips

If this DTC is output, the engine or transmission 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 if DTCs are output.

      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 (SHIFT LEVER IN P)


    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.


    NG

    CHECK CRANKSHAFT PULLEY REVOLUTION (SHIFT LEVER IN N) 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.

    5. Clear DTCs and freeze frame data.

    6. Turn the power switch off.


    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.

    4. Read the Data List.

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

      OK
      The engine revs up.

      Tech Tips


      • If the engine does not rev up and the reading on the GTS shows DTC P3147-239 (hybrid vehicle transmission input malfunction [shaft damaged]), or if MG1 turns but the engine does not crank, replace the hybrid vehicle transmission assembly.

      • A01FQ2CE01

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

        Data List Engine Speed Generator (MG1) Rev
        Reference Value Approximately 900 rpm Approximately 3000 rpm
        Approximately 1500 rpm Approximately 5000 rpm

    6. Turn the power switch off.


    NG

    REPLACE HYBRID VEHICLE TRANSMISSION 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.


    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    OK

  6. INSPECT ENGINE SPEED


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Move the shift lever to D.

    4. While driving at a vehicle speed of more than 6 mph (10 km/h), fully depress the accelerator pedal to raise the engine speed.

      Note

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

      OK
      Engine speed increases smoothly.

      Tech Tips

      If the engine over-revs or the reading on the GTS shows DTC P3147-241 (hybrid vehicle transmission input malfunction [input system lock]), replace the transmission input damper cover assembly.

    5. Turn the power switch off.


    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    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.


    NG

    REPAIR OR REPLACE ENGINE

    OK

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here