HYBRID CONTROL SYSTEM Drive Start Control

DESCRIPTION

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

If the hybrid vehicle control ECU assembly 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.

B004G1CE19

CAUTION / NOTICE / HINT

Tech Tips

Even if the accelerator pedal position is maintained, the driving torque may increase when driving uphill and decrease when driving downhill. This is due to 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

        Shift control

      • Activation conditions


      • Pattern A (When all of the following conditions are met, control starts.)


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

        • The shift lever is moved from P to any forward position (D or S) or R.


      • Pattern B (When all of the following conditions are met, control starts.)


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

        • The shift lever is moved from R to any forward position (D or S), any forward position (D or S) to R, or N to R.

          B004EY5E01

      • Items Controlled


        • Driving torque is restricted.


      • Deactivation Conditions


        • The accelerator pedal is released.

        • The shift lever is in P or N.


        Reverse control

      • Activation conditions


      • The shift lever is in R.

      • The accelerator pedal is depressed excessively.

        B004F7YE01

      • Items Controlled


        • Driving torque is restricted.


      • Deactivation Conditions


        • The accelerator pedal is released.

        • The shift lever is moved to any position other than R.

      Tech Tips


      • The driving torque restricted level differs between pattern A, pattern B and Reverse control.

      • 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 (HEALTH CHECK)


    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

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


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Turn the GTS on.

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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      FR Wheel Speed
      FL Wheel Speed
      RR Wheel Speed
      RL Wheel Speed

    5. Read the values displayed on the GTS.

      Standard
      GTS Display Condition Specified Condition

      FR Wheel Speed

      FL Wheel Speed

      RR Wheel Speed

      RL Wheel Speed

      		 Vehicle stopped 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.

    6. 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. Turn the GTS on.

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


      Powertrain > Hybrid Control > Data List
      Tester Display
      Vehicle Spd

    5. Read the value displayed on the GTS.

      Standard
      Inspection Condition Specified Condition
      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.

    6. 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 (READY).

    3. Turn the GTS on.

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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Deceleration Sensor
      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 (READY).

    3. Turn the GTS on.

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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Steering Angle Sensor

    5. Read the value displayed on the GTS.

      Standard
      Condition Specified Condition
      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 SYMPTOM 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

        Shift control

      • Activation conditions


      • Pattern A (When all of the following conditions are met, control starts.)


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

        • The shift lever is moved from P to any forward position (D or S) or R.


      • Pattern B (When all of the following conditions are met, control starts.)


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

        • The shift lever is moved from R to any forward position (D or S), any forward position (D or S) to R, or N to R.

          B004EY5E01

      • Items Controlled


        • Driving torque is restricted.


      • Deactivation Conditions


        • The accelerator pedal is released.

        • The shift lever is in P or N.


        Reverse control

      • Activation conditions


      • The shift lever is in R.

      • The accelerator pedal is depressed excessively.

        B004F7YE01

      • Items Controlled


        • Driving torque is restricted.


      • Deactivation Conditions


        • The accelerator pedal is released.

        • The shift lever is moved to any position other than R.

      Tech Tips


      • The driving torque restricted level differs between pattern A, pattern B and Reverse control.

      • 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 (HEALTH CHECK)


    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.

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

    6. Turn the power switch off.


    B

    GO TO DTC CHART

    A

  10. INSPECT SHIFT LEVER POSITION SENSOR


    1. Inspect the shift lever position sensor.

      Click here

      Result
      Result Proceed to
      Normal A
      Abnormal B

    B

    REPLACE SHIFT LEVER POSITION SENSOR Click here

    A

  11. READ VALUE USING GTS (ACCELERATOR PEDAL POSITION)


    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 #1 and Accel Pedal Pos #2.


      Powertrain > Hybrid Control > Data List
      Tester Display
      Accel Pedal Pos #1
      Accel Pedal Pos #2

    5. Read the value displayed on the GTS.

      OK
      Condition Specified Condition
      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 SYMPTOM TABLE) Click here

    NG

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here