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.	INF Code	DTC Detection Condition	Trouble Area
P0A0F	238	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

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

While driving the vehicle at a speed of 12 mph (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, if you drive the vehicle at a speed of 12 mph (20 km/h) or more in EV mode for 3 seconds or more, you can confirm this DTC.

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

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

Turn the power switch off.

GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

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.
NG
CHECK CRANKSHAFT PULLEY REVOLUTION (SHIFT LEVER IN N) Click here

OK
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

OK
The crankshaft rotates smoothly.

CHECK ENGINE RACING

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Data List / Generator (MG1) Rev, Engine Revolution.
Read the Data List.
Turn the power switch on (READY).


*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

Turn the power switch off.

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 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.
NG
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

OK

OK
The wheels turn (the vehicle creeps forward).

CHECK ENGINE SPEED

Connect the GTS to the DLC3.
Turn the power switch on (READY).
Enter the following menus: Powertrain / Hybrid Control / Data List / Motor (MG2) Revolution, Generator (MG1) Rev, Engine Revolution.
Read the Data List.
Move the shift lever to D.

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.

Turn the power switch off.

REPLACE POWER MANAGEMENT CONTROL ECU Click here

REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY Click here

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.
OK
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

NG
REPAIR OR REPLACE ENGINE