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Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (3UR-FE) - Circuit Tests (2 Of 2) >> SFI System >> Drive Start Control System [08/2017 - 08/2018] >> Procedure
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Drive Start Control System [08/2017 - 08/2018]: 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  8

    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 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.
          GTY761764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Driving torque 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
        • Driving torque is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • 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

    Result: 

    B 

    PROCEED TO PROBLEM SYMPTOM TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2017 - 08/2018] 

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    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

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2016 - 08/2018] 

    Result: 

    A 

    See step  4

  4. READ VALUE USING GTS (FR, FL, RR, RL WHEEL SPEED) 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Start the engine.
    5. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.
    6. 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
      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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT FRONT OR REAR SPEED SENSOR 

    Result: 

    OK 

    See step  5

  5. READ VALUE USING GTS (SPD (SP2)) 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Start the engine.
    5. Enter the following menus: Powertrain / Engine / Data List / SPD (SP2)
    6. Read the value displayed on the GTS.

      Standard

      GTS Display Condition Specified Condition
      SPD (SP2) Vehicle stopped, engine running 0 RPM
      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 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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT TRANSMISSION REVOLUTION SENSOR 

    Result: 

    OK 

    See step  6

  6. READ VALUE USING GTS (DECELERATION SENSOR) 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Start the engine.
    5. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List / Deceleration Sensor and Deceleration Sensor2.
    6. 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
      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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSPECT YAW RATE AND ACCELERATION SENSOR. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

    Result: 

    OK 

    See step  7

  7. READ VALUE USING GTS (STEERING ANGLE SENSOR) 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Start the engine.
    5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / Steering Angle Sensor.
    6. Read the value displayed on the GTS.

      Standard

      GTS Display Condition Specified Condition
      Steering Angle Sensor Steering wheel turned left Value increases with steering wheel operation
      Steering wheel turned right Value decreases with steering wheel operation
      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.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [08/2017 - 08/2018] 

    Result: 

    NG 

    INSPECT STEERING ANGLE SENSOR. Refer to  REMOVAL [08/2015 - ] 

  8. 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 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.
          GTY761764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Items Controlled
        • Driving torque 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
        • Driving torque is restricted.
      • Deactivation Conditions
        • The accelerator pedal is released.
        • The shift lever is moved to any position other than R.

      HINT: 

      • 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

    Result: 

    A 

    SYSTEM NORMAL 

    Result: 

    B 

    See step  9

  9. CHECK DTC OUTPUT 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    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

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2016 - 08/2018] 

    Result: 

    A 

    See step  10

  10. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Inspect the 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  11

  11. READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR) 
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No. 1 Voltage % and Accelerator Position Sensor No. 2 Voltage %.
    5. Read the value displayed on the GTS.

      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 [08/2017 - 08/2018]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYSTEM NORMAL (GO TO PROBLEM SYMPTOM TABLE). Refer to  PROBLEM SYMPTOMS TABLE [08/2017 - 08/2018] 

    Result: 

    NG 

    REPLACE ACCELERATOR PEDAL (W/SENSOR) ROD ASSEMBLY. Refer to  REMOVAL [08/2015 - ] 

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