HYBRID CONTROL SYSTEM, Diagnostic DTC:P314779

DTC Code DTC Name
P314779 Transmission (Shaft) Mechanical Linkage Failure

DTC SUMMARY

Refer to the DTC summary for DTC P1C7779.

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DESCRIPTION

Refer to the description for DTC P1C7779.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P314779 Transmission (Shaft) Mechanical Linkage Failure

Drive force from motor (MG2) or the engine cannot be transmitted to the wheels.

The engine, generator (MG1), motor (MG2) or hybrid vehicle transaxle assembly does not run smoothly due to a mechanical malfunction.

(1 trip detection logic)

  • Hybrid vehicle transaxle assembly

  • Transmission input damper assembly

  • Hybrid vehicle control ECU

  • Engine

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P314779

  • Generator Revolution

  • Motor Revolution

  • Engine Revolution

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. Turn the power switch on (READY).

  7. Drive the vehicle at approximately 30 km/h (19 mph) or more for approximately 5 seconds or more using the engine.

  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  9. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

CAUTION / NOTICE / HINT

Tech Tips


  • A seized engine, mechanical malfunction of the hybrid vehicle transaxle can be suspected.

  • If this DTC is output, the engine or gears in the transaxle may have seized or foreign matter have been caught in either of them. Therefore, check the engine oil, hybrid transaxle fluid, coolant (for Engine) and coolant (for Inverter) levels.

PROCEDURE


  1. CHECK DTC OUTPUT (ENGINE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Engine / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      No DTCs are output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs are also output. B
      Relevant DTC
      P03352A Crankshaft Position Sensor "A" Signal Stuck in Range
      P033531 Crankshaft Position Sensor "A" No Signal
      P033562 Crankshaft Position Sensor "A" Signal Compare Failure

    5. Turn the power switch off.


    B

    GO TO DTC CHART (SFI SYSTEM) w/ Canister Pump Module: Click here
    GO TO DTC CHART (SFI SYSTEM) w/o Canister Pump Module: Click here

    A

  2. CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)


    1. Push the P position switch (transmission shift main switch).

    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.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION) 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. Clear the DTCs and freeze frame data.


      Powertrain > Hybrid Control > Clear DTCs

    5. Enter the following menus: Powertrain / Engine / Trouble Codes.

    6. Clear the DTCs and freeze frame data.


      Powertrain > Engine > Clear DTCs

    7. Turn the power switch off.

      Result
      Proceed to
      NEXT

    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 / Motor Generator Control / Data List / Generator Revolution, Engine Speed.

    4. Read the Data List.


      Powertrain > Motor Generator > Data List
      Tester Display
      Engine Speed
      Generator Revolution
    5. B004PH9E06

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

      OK
      "MG1 Motor Revolution" is approximately 3.6 times "Engine Speed".

      Tech Tips


      • If the engine does not race and DTC P314779 (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 Revolution" and " Engine Speed".

      Data List Engine Speed MG1 Motor Revolution
      Reference Value Approximately 1000 rpm Approximately 3600 rpm
      Approximately 1500 rpm Approximately 5400 rpm
      Approximately 2500 rpm Approximately 9000 rpm

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE 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.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  6. INSPECT ENGINE SPEED


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Motor Generator Control / Data List / Engine Speed, Motor Revolution, Generator Revolution.

    4. Read the Data List.


      Powertrain > Motor Generator > Data List
      Tester Display
      Engine Speed
      Motor Revolution
      Generator Revolution

    5. Move the shift lever to D.

    6. Fully depress the accelerator pedal when the vehicle speed is 10 km/h (6 mph) or more.

      Note

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

    7. Calculate the difference between the value of "Engine Speed" and "0.28 X Generator Revolution + 0.19 X Motor Revolution".

    8. Turn the power switch off.

      Result
      Result Proceed to
      The absolute value of the difference is less than 500 rpm. A
      The absolute value of the difference is 500 rpm or more continuously for 1 second. B

    A

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    B

    REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY Click here

  7. CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)


    1. Lift up the vehicle.

    2. Depress the brake pedal and move the shift lever to select neutral (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.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    NG

    REPAIR OR REPLACE ENGINE