HYBRID CONTROL SYSTEM Drive Start Control

DESCRIPTION

The drive start control is controlled by the hybrid vehicle control ECU.

If the hybrid vehicle control ECU determines that the shift lever and accelerator pedal are operated abnormally, driving torque is restricted and, when necessary, a warning is displayed on the combination meter assembly.

B005Y03E22

CAUTION / NOTICE / HINT

Tech Tips

Even if the accelerator pedal position is maintained, the hybrid system output may increase when driving uphill and decrease when driving downhill. This is due to the drive start control controlling the driving torque, and is not a malfunction.

PROCEDURE


  1. SYMPTOM CONFIRMATION


    1. Interview the customer to confirm the problem.

      Result
      Result Proceed to
      Hunting A
      Hesitation/poor acceleration B

    B

    PAST ACTIVATION CONFIRMATION Click here

    A

  2. PAST ACTIVATION CONFIRMATION


    1. Check if the customer operated the vehicle in a way that would cause the drive start control to operate.

      Tech Tips

      Drive Start Control Activation Conditions

      Condition 1 (Reverse control)

      Activation conditions


      • Reverse (R) is selected.

      • The accelerator pedal is depressed.

        B005YCPE05

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift state is changed to any state other than reverse (R).

      • The accelerator pedal is released.

      Condition 2 (Shift control A)

      Activation conditions


      • The shift state is changed from park (P) to any forward state (drive (D) or brake (B)) or park (P) to reverse (R).

      • The accelerator pedal is depressed approximately 1/5 or more.

        B005Y8RE20

        • If the shift lever is moved to attempt to change the shift state from park (P) when the accelerator pedal is depressed, the shift state will not change and drive-start control will not operate.

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • Shift state is changed to park (P) or neutral (N).

      • The accelerator pedal is released.

      Condition 3 (Shift control B)

      Activation conditions


      • The shift state is changed from reverse (R) to any forward state (drive (D) or brake (B)), any forward state (drive (D) or brake (B)) to reverse (R), or Neutral (N) to reverse (R).

      • The accelerator pedal is depressed approximately 1/5 or more.

        B005XFZE05

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • Shift state is changed to park (P) or neutral (N).

      • The accelerator pedal is released.

      Tech Tips

      During reverse control or shift control, driving torque is adjusted based on the road gradient and steering angle.

      Result
      Result Proceed to
      Performed A
      Not performed B

    B

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE) Click here

    A

  3. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: System Select / Health Check.

    4. Check the DTCs.

    5. Turn the power switch off.

      Result
      Result Proceed to
      DTCs are not output A
      DTC is output B

    B

    GO TO DTC CHART

    A

  4. READ VALUE USING GTS (FR, FL, RR, RL WHEEL SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.

    4. Read the value displayed on the GTS.

      Standard
      GTS Display Condition Specified Condition

      FR Wheel Speed

      FL Wheel Speed

      RR Wheel Speed

      RL Wheel Speed

      		 Vehicle stopped, engine running 0 km/h (0 mph)
      Vehicle being driven at constant speed between 16 to 64 km/h (10 to 40 mph) No large fluctuations when driving at a constant speed

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tech Tips

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

    5. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT FRONT OR REAR SPEED SENSOR Click here

    OK

  5. READ VALUE USING GTS (VEHICLE SPD)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Vehicle Spd.

    4. Read the value of "Vehicle Spd" displayed on the GTS

      Standard
      GTS Display Inspection Condition Specified Condition
      Vehicle Spd Vehicle stopped 0 km/h (0 mph)

      Vehicle being driven at a constant speed

      (16 to 64 km/h (10 to 40 mph))

      		 No large fluctuations in displayed speed

      CAUTION:

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

      Tech Tips

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

    5. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    OK

  6. READ VALUE USING GTS (DECELERATION SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / Deceleration Sensor and Deceleration Sensor2.

    5. Read the value displayed on the GTS.

      Standard
      GTS Display Condition Specified Condition

      Deceleration Sensor

      Deceleration Sensor2

      		 During deceleration Value changes with vehicle speed
      During acceleration Value changes with vehicle speed

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tech Tips

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT YAW RATE SENSOR Click here

    OK

  7. READ VALUE USING GTS (STEERING ANGLE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / Steering Angle Sensor.

    5. Read the value displayed on the GTS.

      Standard
      GTS Display Condition Specified Condition
      Steering Angle Sensor Steering wheel turned left Value increases with steering wheel operation
      Steering wheel turned right Value decreases with steering wheel operation

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tech Tips

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOMS TABLE) Click here

    NG

    INSPECT STEERING ANGLE SENSOR Click here

  8. PAST ACTIVATION CONFIRMATION


    1. Check if the customer operated the vehicle in a way that would cause the drive start control to operate.

      Tech Tips

      Drive Start Control Activation Conditions

      Condition 1 (Reverse control)

      Activation conditions


      • Reverse (R) is selected.

      • The accelerator pedal is depressed.

        B005YCPE05

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift state is changed to any state other than reverse (R).

      • The accelerator pedal is released.

      Condition 2 (Shift control A)

      Activation conditions


      • The shift state is changed from park (P) to any forward state (drive (D) or brake (B)) or park (P) to reverse (R).

      • The accelerator pedal is depressed approximately 1/5 or more.

        B005Y8RE20

        • If the shift lever is moved to attempt to change the shift state from park (P) when the accelerator pedal is depressed, the shift state will not change and drive-start control will not operate.

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • Shift state is changed to park (P) or neutral (N).

      • The accelerator pedal is released.

      Condition 3 (Shift control B)

      Activation conditions


      • The shift state is changed from reverse (R) to any forward state (drive (D) or brake (B)), any forward state (drive (D) or brake (B)) to reverse (R), or Neutral (N) to reverse (R).

      • The accelerator pedal is depressed approximately 1/5 or more.

        B005XFZE05

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • Shift state is changed to park (P) or neutral (N).

      • The accelerator pedal is released.

      Tech Tips

      During reverse control or shift control, driving torque is adjusted based on the road gradient and steering angle.

      Result
      Result Proceed to
      Not performed A
      Performed B

      Tech Tips

      If the customer operated the vehicle in a way which caused the drive start control to operate, explain the operation of the system to the customer and that the operation is not a malfunction.


    B

    SYSTEM NORMAL

    A

  9. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Health Check.

    5. Check the DTCs.

    6. Turn the power switch off.

      Result
      Result Proceed to
      DTCs are not output A
      DTC is output B

    B

    GO TO DTC CHART

    A

  10. READ VALUE USING TECHSTREAM (SHIFT SENSOR SHIFT POS)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Shift Sensor Shift Pos.

    5. Read the value displayed on the GTS.

      OK
      Condition Specified Condition
      Select shift state Matches currently selected shift state

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO ELECTRONIC SHIFT LEVER SYSTEM Click here

    OK

  11. READ VALUE USING GTS (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos.

    5. Read the value displayed on the GTS.

      OK
      GTS Display Condition Specified Condition

      Accel Pedal Pos #1

      Accel Pedal Pos #2

      		 Accelerator Pedal Released → Depressed Values smoothly change following accelerator pedal operation

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOMS TABLE) Click here

    NG

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here