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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Hybrid Control System (AWD) - Circuit Tests (2 Of 2)) >> HYBRID CONTROL SYSTEM (for AWD) >> Drive Start Control [10/2022 - 11/2023] >> Procedure

Drive Start Control [10/2022 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. SYMPTOM CONFIRMATION 
    1. Interview the customer to confirm the problem.

      Result

      Result  Proceed to
      Hunting  A
      Hesitation/poor acceleration  B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

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

      HINT: 

      Drive Start Control Activation Conditions 

      Shift control 

      1. 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 (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 (D or S), from (D or S) or N to R.
          GTY941100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Hybrid system output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is in P or N.

      Reverse control 

      1. Activation conditions
      • The shift lever is in R.
      • The accelerator pedal is depressed excessively.
        GTY943302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Hybrid system output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • The hybrid system output restricted level differs between Pattern A, Pattern B and Reverse control.
      • During Shift control or Reverse control, hybrid system output is adjusted based on the road gradient.

      Result

      Result  Proceed to
      Performed  A
      Not performed  B

    Result: 

    B 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - 11/2023] 

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. According to the display on the GTS, select "Health Check".
    2. Check the DTCs.

      Result

      Result  Proceed to
      DTCs are not output  A
      DTCs are output  B
    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023] 

    Result: 

    A 

    See step  4

  4. READ VALUE USING GTS (FR, FL, RR, RL WHEEL SPEED) 
    1. Turn the ignition switch to ON (READY).
    2. Read the values displayed on the GTS.

      Chassis > Brake/EPB > Data List 

      Tester Display
      FR Wheel Speed
      FL Wheel Speed
      RR Wheel Speed
      RL Wheel Speed

      Standard

      Condition Specified Condition
      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
      WARNING:

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

      HINT: 

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

    3. Turn the ignition switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT FRONT OR REAR SPEED SENSOR. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023] 

    Result: 

    OK 

    See step  5

  5. READ VALUE USING GTS (VEHICLE SPEED) 
    1. Turn the ignition switch to ON (READY).
    2. Read the value displayed on the GTS.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Vehicle Speed

      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
      WARNING:

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

      HINT: 

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

    3. Turn the ignition switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023] 

    Result: 

    OK 

    See step  6

  6. READ VALUE USING GTS (LATERAL G, FORWARD AND REARWARD G) 
    1. Turn the ignition switch to ON (READY).
    2. Read the values displayed on the GTS.

      Chassis > Brake/EPB > Data List 

      Tester Display
      Lateral G
      Forward and Rearward G

      Standard

      Condition Specified Condition
      During deceleration Value changes with vehicle speed
      During acceleration Value changes with vehicle speed
      WARNING:

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

      HINT: 

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

    3. Turn the ignition switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - 11/2023] 

    Result: 

    NG 

    INSPECT YAW RATE SENSOR. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023] 

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

      HINT: 

      Drive Start Control Activation Conditions 

      Shift control 

      1. 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 (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 (D or S), from (D or S) or N to R.
          GTY941100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Hybrid system output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is in P or N.

      Reverse control 

      1. Activation conditions
      • The shift lever is in R.
      • The accelerator pedal is depressed excessively.
        GTY915856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Hybrid system output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • The hybrid system output restricted level differs between Pattern A, Pattern B and Reverse control.
      • During Shift control or Reverse control, hybrid system output is adjusted based on the road gradient.

      Result

      Result Proceed to
      Not performed A
      Performed B

      HINT: 

      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.

    Result: 

    B 

    SYSTEM NORMAL 

    Result: 

    A 

    See step  8

  8. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. According to the display on the GTS, select "Health Check".
    2. Check the DTCs.

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B
    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023] 

    Result: 

    A 

    See step  9

  9. INSPECT SHIFT LEVER POSITION SENSOR 

    Refer to INSPECTION [12/2019 - ]

    Result

    Result  Proceed to
    Normal A
    Abnormal B

    Result: 

    B 

    REPLACE SHIFT LEVER POSITION SENSOR. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    A 

    See step  10

  10. READ VALUE USING GTS (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE %, ACCELERATOR POSITION SENSOR NO. 2 VOLTAGE %) 

    Refer to ON-VEHICLE INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [10/2022 - 11/2023] 

    Result: 

    NG 

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

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