DTC P0A0F-238: Engine Failed to Start: Procedure

1. Connect the Techstream 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 vehicle control ECU circuit malfunction) is output.	B

5. Turn the power switch off.

B → See step   9 

A: Go to next step 

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.
   WARNING:

   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.

NG → See step   8 

OK: Go to next step 

1. Connect the Techstream 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: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Data List / Generator (MG1) Rev, Engine Revolution.
4. Read the Data List.
5. Turn the power switch on (READY).
6. 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: 

   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

   Fig 1: Generator (MG1) & Motor (MG2) Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Turn the power switch off.

NG → See step   10 

OK: Go to next step 

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 → See step   10 

OK: Go to next step 

1. Connect the Techstream 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.
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.

NG → See step   11 

OK: Go to next step 

1. Perform steps 2 through 6 again.

   OK

   The problem symptom is not reproduced.

NG → See step   10 

OK → See step   12 

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.
   WARNING:

   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.

NG → REPAIR OR REPLACE ENGINE 

OK → See step   10