DTC P0A0F-238: Engine Failed to Start [12/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   Only P0A0F-238 is output or P0A0F-238 and DTCs other than P0A1D are also output.	A
   P0A0F-238 and P0A1D (hybrid vehicle control ECU circuit malfunction) are output.	B

5. Turn the ignition switch off.

B → See step   8 

A: Go to next step 

1. Check that the shift lever is in the P position.
2. Lift up the vehicle.
3. Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.
   WARNING:

   Do not turn the ignition switch to ON (READY) while performing this inspection. Be sure to turn the ignition 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 → See step   7 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to 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 ignition switch off.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to 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

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

   HINT: 

   • 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 transaxle assembly.
   • 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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

6. Turn the ignition switch off.

NG → See step   9 

OK: Go to next step 

1. Turn the ignition switch to 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 ignition switch off.

NG → See step   9 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (READY).
3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor (MG2) Revolution, Generator (MG1) Rev, Engine Revolution.
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 + 0.27 X Motor (MG2) Revolution is 500 rpm or more and it is maintained for 1 second.

   HINT: 

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

7. Turn the ignition switch off.

NG → See step   11 

OK → See step   10 

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.
   WARNING:

   Do not turn the ignition switch to ON (READY) while performing this inspection. Be sure to turn the ignition 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 → See step   9