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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Circuit Tests (2 Of 2) & Symptom Tests >> SFI System >> Drive Start Control [10/2021 - 10/2022] >> Procedure

Drive Start Control [10/2021 - 10/2022]: Procedure

  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  6

    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 any forward position (D or M) 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 M), any forward position (D or M) to R, or N to R.
          GTY922129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Engine 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.
        GTY839367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Engine output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • The engine output restricted level differs between pattern A, pattern B and Reverse control.
      • During reverse control or shift control, engine 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 [12/2019 - 10/2022] 

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT 
    1. Perform the Health Check using the GTS.
    2. Check the DTCs.

      Result

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

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022] 

    Result: 

    A 

    See step  4

  4. READ VALUE USING GTS (FR, FL, RR, RL WHEEL SPEED) 
    1. Start the engine.
    2. Read the value displayed on the GTS.

      Chassis > Brake/EPB > Data List 

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

      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
      WARNING:

      When performing a drive test, 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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT FRONT OR REAR SPEED SENSOR 

    Result: 

    OK 

    See step  5

  5. READ VALUE USING GTS (LATERAL G AND FORWARD AND REARWARD G) 
    1. Start the engine.
    2. Read the value displayed on the GTS.

      Chassis > Brake/EPB > Data List 

      Tester Display
      Lateral G
      Forward and Rearward G

      Standard

      GTS Display Condition Specified Condition
      Lateral G
      Forward and Rearward G      		 During deceleration Value changes with vehicle speed
      During acceleration Value changes with vehicle speed
      WARNING:

      When performing a drive test, 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.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] 

    Result: 

    NG 

    INSPECT AIRBAG SENSOR ASSEMBLY. Refer to  TERMINALS OF ECU [10/2021 - 11/2023] 

  6. 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 any forward position (D or M) 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 M), any forward position (D or M) to R, or N to R.
          GTY944699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Engine 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.
        GTY839367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Engine output is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • The engine output restricted level differs between pattern A, pattern B and Reverse control.
      • During reverse control or shift control, engine output is adjusted based on the road gradient.

      Result

      Result Proceed to
      Performed A
      Not performed B

    Result: 

    A 

    SYSTEM NORMAL 

    Result: 

    B 

    See step  7

  7. CHECK DTC OUTPUT 
    1. Perform the Health Check using the GTS.
    2. Check the DTCs.

      Result

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

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022] 

    Result: 

    A 

    See step  8

  8. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    Result

    Result Proceed to
    Normal A
    Abnormal B

    Result: 

    B 

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    Result: 

    A 

    See step  9

  9. READ VALUE USING GTS (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE % AND NO. 2 VOLTAGE %) 
    1. Read the value displayed on the GTS.

      Powertrain > Engine > Data List 

      Tester Display
      Accelerator Position Sensor No. 1 Voltage %
      Accelerator Position Sensor No. 2 Voltage %

      OK

      GTS Display Condition Specified Condition
      Accelerator Position Sensor No. 1 Voltage % Accelerator Pedal Released → Depressed Values smoothly change following accelerator pedal operation
      Accelerator Position Sensor No. 2 Voltage %

      HINT: 

      For numerical values of Accelerator Position Sensor No. 1 Voltage % and Accelerator Position Sensor No. 2 Voltage %, refer to the Data List.

      Refer to DATA LIST / ACTIVE TEST [09/2020 - 10/2022]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] 

    Result: 

    NG 

    REPLACE ACCELERATOR PEDAL (W/SENSOR) ROD ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

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