RX400h · Service Manual HYBRID SYSTEM

P0A0F-238

Diagnostic trouble codes

DESCRIPTION

The HV control ECU detects this DTC and effects fail-safe control if the engine or transaxle gear has seized up, or foreign objects have been caught in either of them.
DTC No.
 INF Code
 DTC Detection Condition
 Trouble Area
P0A0F
 238
 Engine does not start even though cranking it (transaxle input malfunction [engine system])
  1. Engine
  2. Hybrid vehicle transaxle assembly (shaft, gear)
  3. Transmission input damper
  4. Wire harness or connector
  5. HV control ECU

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

A105142E01

INSPECTION PROCEDURE


1. READ OUTPUT DTC (SFI SYSTEM)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position

  1. Select the following menu items: Powertrain / Engine / DTC.

  1. Read output DTC. (Click here)

    Result:
    DTCs are output



 YES
GO TO DTC CHART
NO


2. CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

  1. Turn the ignition switch off, move the shift lever to the P position, and lift up the vehicle.

  1. Turn the crank pulley by hand to check if the crankshaft rotates.

    OK:
    The crankshaft rotates.



 NG
Go to step 11
OK


3. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - CRANKSHAFT POSITION SENSOR)

  1. Disconnect the H32 connector from the HV control ECU.

  1. Disconnect the C3 crankshaft position sensor connector.

  1. A105215E02
    Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for open):
    Tester Connection
    		 Specified Condition
    NE+ (H32-25) - NE+ (C3-1)
    		 Below 1 Ω
    NE- (H32-24) - NE- (C3-2)
    		 Below 1 Ω.

    Standard Resistance (Check for short):
    Tester Connection
    		 Specified Condition
    NE+ (H32-25) or NE+ (C3-1) - Body ground
    		 10 kΩ or higher
    NE- (H32-24) or NE- (C3-2) - Body ground
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4. INSPECT CRANKSHAFT POSITION SENSOR

  1. A064984E17
    Disconnect the C3 crankshaft position sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		 Specified Condition
    NE+ (C3-1) - NE- (C3-2)
    (Cold)
    		 1,630 to 2,740 Ω
    NE+ (C3-1) - NE- (C3-2)
    (Warm)
    		 2,065 to 3,225 Ω

    NOTICE:
    "Cold" and "Warm" mean the temperature of the part to be inspected. The temperature range is -10°C to 50°C for "Cold" and 50°C to 100°C for "Warm".



 NG
REPLACE CRANKSHAFT POSITION SENSOR
OK


5. READ OUTPUT DTC (HV)

  1. Connect the intelligent tester to the DLC3.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC.

  1. Read output DTC. (Click here)

  1. Confirm and record the DTCs, freeze frame data, and information for the HV system.


NEXT


6. CLEAR DTC (HV)

  1. Connect the intelligent tester to the DLC3.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC / Clear.

  1. Clear the DTCs of the HV system.


NEXT


7. CHECK READY LIGHT ON

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / MG1 Rev and Engine Spd.

  1. Depress the brake pedal and put the vehicle into the READY-on state.

    OK:
    The READY light comes on.

    HINT:
    1. If the READY light does not come on and the reading on the intelligent tester shows DTC P0A90-239 (HV transaxle input malfunction [shaft damaged]), or the READY light comes on and the Generator turns but the engine does not crank, replace the HV transaxle assembly.
    2. If this DTC (P0AF-238) is output, the HV battery may be dead and DTC P3000-388 or P3000-389 may be output. If any of them is output, the battery should be charged with the THS charger.

  1. A105162E01
    Refer to the graph for data list confirmation of "MG1 REV" and "ENGINE SPD".
    Engine speed
    		 Generator speed
    Approx. 900 rpm
    		 Approx. 3,200 rpm
    Approx. 1,500 rpm
    		 Approx. 5,400 rpm



NG
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK


8. CHECK ENGINE RACING

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / MG1 Rev and Engine Spd.

  1. While the READY light is on, depress the accelerator pedal for 10 seconds with the shift lever in the P position.

    OK:
    The engine revs up.

    HINT:
    If the engine does not rev up and the reading on the intelligent tester shows DTC P0A90-239 (HV transaxle input malfunction [shaft damaged]), or the Generator turns but the engine does not crank, replace the HV transaxle assembly.



 NG
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK


9. CHECK CREEP MOVEMENT

  1. Connect the intelligent tester to the DLC3.

  1. Depress the brake pedal, move the shift lever to the D position, and release the brake pedal.

    OK:
    The wheels turn (creeping along).

    HINT:
    If the wheels do not turn and the reading on the intelligent tester shows DTC P0A90-602 (transaxle output malfunction), replace the HV transaxle assembly.



 NG
REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK


10. CHECK ENGINE ACCELERATION SPEED

  1. Connect the intelligent tester to the DLC3.

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

    OK:
    Engine speed increases smoothly.

    HINT:
    If the engine over-revs or the reading on the intelligent tester shows DTC 0A90-241 (transaxle input malfunction [torque limiter slipping]), replace the transmission input damper.



 NG
REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY
OK

PERFORM SIMULATION TEST. IF SYMPTOM IS NOT REPRODUCED, REPLACE ENGINE, HV TRANSAXLE AND HV CONTROL ECU

11. CHECK FRONT TIRE REVOLUTION

  1. Lift up the vehicle.

  1. Move the shift lever to the N position with the ignition switch off.

    CAUTION:
    Do not put the vehicle into the READY-on state while performing this inspection. Be sure to turn the ignition switch off because the engine may start.

  1. Turn the crank pulley by hand to check if the front tires rotate.

    OK:
    The front tires do not rotate.



 NG
CHECK AND REPAIR ENGINE
OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY


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