HYBRID CONTROL SYSTEM Drive Start Control System

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.

B002JXGE01

CAUTION / NOTICE / HINT

Tech Tips

Even if the accelerator pedal position is maintained, the engine 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
      Proceed to
      Hunting
      Hesitation/poor acceleration

    Hesitation/poor acceleration

    PAST ACTIVATION CONFIRMATION Click here

    Hunting

  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


      • The shift lever is in R.

      • The accelerator pedal is depressed.

        B002HEAE01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


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

      • The accelerator pedal is released.

      Condition 2 (Shift control a)

      Activation conditions


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

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

        B002KS9E01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift lever is in P or N.

      • The accelerator pedal is released.

      Condition 3 (Shift control b)

      Activation conditions


      • 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.

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

        B002IEYE01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift lever is in P or 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
      Proceed to
      Performed
      Not performed

    Not performed

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE) Click here

    Performed

  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
      Proceed to
      DTCs are not output
      DTC is output

    DTC is output

    GO TO DTC CHART

    DTCs are not output

  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. Enter the following menus: Chassis / ABS/VSC/TRC / 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

      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition
      FR Wheel Speed Front speed sensor RH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front speed sensor LH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear speed sensor RH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear speed sensor LH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) When driving at constant speed: No large fluctuations

    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 16.1 to 64.4 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.


      Powertrain > Hybrid Control > Data List
      Tester Display
      Vehicle Spd

    4. Read the value of "Vehicle Spd" 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.

    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 (READY).

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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Deceleration Sensor
      Deceleration Sensor2

    4. 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.

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


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

      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition
      Steering Angle Sensor Steering angle sensor Min.: -3276.8 degrees, Max.: 3276.7 degrees

      Turning left: Increases

      Turning right: Decreases

    4. 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.

    5. 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

      Condition 1 (Reverse control)

      Activation conditions


      • The shift lever is in R.

      • The accelerator pedal is depressed.

        B002HEAE01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


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

      • The accelerator pedal is released.

      Condition 2 (Shift control a)

      Activation conditions


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

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

        B002KS9E01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift lever is in P or N.

      • The accelerator pedal is released.

      Condition 3 (Shift control b)

      Activation conditions


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

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

        B002IEYE01

      Items Controlled


      • Driving torque is restricted.

      Deactivation Conditions


      • The shift lever is in P or 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.

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

    B

    GO TO DTC CHART

    A

  10. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly.

      Click here

      Result
      Result Proceed to
      Normal A
      Abnormal B

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

  11. READ VALUE USING GTS (ACCELERATOR PEDAL POSITION 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: Powertrain / Hybrid Control / Data List / Accel Pedal Pos.


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

      Powertrain > Hybrid Control > Data List
      Tester Display Measurement Item Range Normal Condition
      Accel Pedal Pos #1

      Accelerator pedal position sensor No. 1

      (Sensor voltage is multiplied by 20 and displayed as a percentage)

      		 -

      Accelerator pedal depressed:

      Changes with accelerator pedal pressure
      Accel Pedal Pos #2

      Accelerator pedal position sensor No. 2

      (Sensor voltage is multiplied by 20 and displayed as a percentage)

      		 -

      Accelerator pedal depressed:

      Changes with accelerator pedal pressure

    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) w/ EGR System: Click here
    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE) w/o EGR System: Click here

    NG

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here