HYBRID CONTROL SYSTEM Drive Start Control System

DESCRIPTION

The drive start control is controlled by the power management control ECU.

If the power management 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.

B002BV7E11

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
      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


      • The shift lever is in R.

      • The accelerator pedal is depressed.

        B002B85E02

      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.

        B002C3AE02

      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.

        B002BMYE02

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

    4. Check DTCs.

      Result
      Result Proceed to
      No DTCs are output. A
      DTCs are output. B

    5. Turn the power switch off.


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

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      FR Wheel Speed

      Front wheel speed sensor RH /

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      Vehicle stopped:

      0 km/h (0 mph)

      When driving at constant speed:

      No large fluctuations
      FL Wheel Speed

      Front wheel speed sensor LH / /

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
      RR Wheel Speed

      Rear wheel speed sensor RH /

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
      RL Wheel Speed

      Rear wheel speed sensor LH /

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
      Result
      Result Proceed to
      Displayed speed value does not fluctuate. A
      Displayed speed value fluctuates. B

      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.


    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 (READY).

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

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      Vehicle Spd

      Vehicle speed/

      Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

      Vehicle stopped:

      0 km/h (0 mph)

      While driving at a constant speed:

      No significant fluctuation
      Result
      Result Proceed to
      Displayed speed value does not fluctuate. A
      Displayed speed value fluctuates. B

      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.


    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. Enter the following menus: Powertrain / Hybrid Control / Data List / Deceleration Sensor and Deceleration Sensor2.

    4. Read the value displayed on the GTS.

      Tester 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.


    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: Powertrain / Hybrid Control / Data List / Steering Angle Sensor.

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Specified Condition
      Steering Angle Sensor

      Steering angle sensor

      Min.: -3276.8 degrees, Max.: 3276.7 degrees

      Turning left: Increases

      Turning right: Decreases
      Standard:
      Condition Specified Condition
      Steering wheel turned left Value increases with steering wheel operation
      Steering wheel turned right Value decreases with steering wheel operation

      Note

      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.


    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.

        B002B85E02

      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.

        B002C3AE02

      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.

        B002BMYE02

      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 (HEALTH CHECK)


    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 DTCs.

      Result
      Result Proceed to
      No DTCs are output. A
      DTCs are output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART

    A

  10. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly Click here.


    B

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

  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. Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1, Accel Pedal Pos #2.

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      Accel Pedal Pos #1

      Accelerator pedal position sensor No.1/

      Min.: 0.0%, Max.: 100.0%

      Accelerator pedal depressed:

      Changes with accelerator pedal pressure
      Accel Pedal Pos #2

      Accelerator pedal position sensor No.2/

      Min.: 0.0%, Max.: 100.0%
      OK
      Condition Specified Condition
      Accelerator Pedal Released → Depressed Values smoothly change following accelerator pedal operation

    5. Turn the power switch off.


    OK

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE) Click here

    B

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here