HYBRID CONTROL SYSTEM Drive Start Control System

DESCRIPTION

The drive start control is controlled by the EV control ECU.

If the EV 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.

A01MILOE03

CAUTION / NOTICE / HINT

Note

When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).

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.

        A01MIIWE01

      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 Br) or R.

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

        A01MHS9E01

      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 Br), any forward position (D or Br) to R, or N to R.

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

        A01MGRGE01

      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


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

    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/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 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

      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 SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / EV / Data List / Vehicle Speed.


      Powertrain > EV > Data List
      Tester Display
      Vehicle Speed

      Powertrain > EV > Data List
      Tester Display Measurement Item Range Normal Condition
      Vehicle Speed Vehicle speed - When driving at constant speed: No large fluctuations

    4. Read the value of "Vehicle Speed" 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, DECELERATION SENSOR2)


    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, Deceleration Sensor2.


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

      Chassis > ABS/VSC/TRAC > Data List
      Tester Display Measurement Item Range Normal Condition
      Deceleration Sensor Acceleration sensor 1

      Min.: -18.525 m/s2, Max.: 18.387 m/s2

      		During deceleration/acceleration: Changes continuously
      Deceleration Sensor2 Acceleration sensor 2

      Min.: -18.525 m/s2, Max.: 18.387 m/s2

      		During deceleration/acceleration: Changes continuously

    4. Read the value displayed on the GTS.

      Standard
      Condition Specified Condition
      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.

        A01MIIWE01

      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 Br) or R.

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

        A01MHS9E01

      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 Br), any forward position (D or Br) to R, or N to R.

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

        A01MGRGE01

      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 TRANSMISSION INSTRUMENT PANEL SHIFT ASSEMBLY


    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 / EV / Data List / Shift Sensor Shift Position.


      Powertrain > EV > Data List
      Tester Display
      Shift Sensor Shift Position
      OK
      Condition Specified Condition
      Shift Sensor Shift Position Matches currently selected shift position
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION INSTRUMENT PANEL SHIFT ASSEMBLY Click here

    OK

  11. READ VALUE USING GTS (ACCEL PEDAL POSITION NO.1, ACCEL PEDAL POSITION NO.2)


    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 Position No.1, Accel Pedal Position No.2.


      Powertrain > EV > Data List
      Tester Display
      Accel Pedal Position No.1
      Accel Pedal Position No.2

      Powertrain > EV > Data List
      Tester Display Measurement Item Range Normal Condition
      Accel Pedal Position No.1 Accelerator pedal position sensor No. 1 -

      Accelerator pedal depressed:

      Changes with accelerator pedal pressure
      Accel Pedal Position No.2 Accelerator pedal position sensor No. 2 -

      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) Click here

    NG

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click here