AUTOMATIC TRANSAXLE SYSTEM ROAD TEST


  1. PROBLEM SYMPTOM CONFIRMATION


    1. Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and simulate the problem symptoms.

  2. ROAD TEST

    CAUTION:


    • B0070MF

      Strictly obey all traffic rules and regulations.

    • Do not drive the vehicle with the GTS cable contacting the pedals, shift lever or steering wheel.

    • Driving the wheel with the GTS cable contacting these areas could impede vehicle control, resulting in a serious accident.


    • B0070WA

      Do not operate the GTS while driving the vehicle.

    • Operating the GTS while driving the vehicle will prevent you from paying sufficient attention to vehicle surroundings, and could result in a serious accident.


    1. Perform a road test.

      Note


      • Be sure to inspect and adjust the engine before performing these tests.

      • Perform the road test with the engine coolant temperature between 60 and 100°C (140 and 212°F) and the ATF temperature between 50 and 100°C (122 and 212°F).

      • Perform these tests with the air conditioning and cruise control off.

      Inspection Procedure
      Transmission Control Switch Test With the vehicle stationary and the shift lever in D, move the shift lever to S and return it to D. Check that the meter display changes from D to the appropriate S range and then back again.
      S Position Test With the vehicle stationary and the shift lever in S, move the shift lever to "+" and "-". Check that the meter display changes accordingly.
      D Position Shift Test While driving the vehicle normally, check that the transmission shifts up and down through each gear properly.
      Lock-up Function While driving on a level surface at a constant speed in the lock-up range with the shift lever in D, lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
      P Position Test Stop the vehicle on an incline (approximately 5° or more). Move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place.
      Abnormal Noise and Vibration Check for abnormal noise and vibration while driving the vehicle forward and backward, and during shift operations.
      Fluid Leakage After performing all other road test inspections, check for fluid leakage.

      Tech Tips

      When checking for DTCs after a repair, drive the vehicle according to the monitor drive pattern.

      Click here

    2. Gear change confirmation


      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON.

      3. Enter the following menus: Powertrain / Engine and ECT / Data List.


        Powertrain > Engine and ECT > Data List
        Tester Display
        Vehicle Speed
        Coolant Temp
        SPD (NT)
        A/T Oil Temperature 1
        Shift Status

      4. Check that the transaxle shifts to each gear while gently accelerating to 80 km/h (50 mph) or higher.

        Tech Tips


        • Check that the value of SPD (NT) drops by 50 rpm or more when the value of Shift Status increases.

        • Depending on the engine speed when the gear is changed, it may be difficult to see the change of SPD (NT).

    3. Lock-up confirmation


      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON.

      3. Enter the following menus: Powertrain / Engine and ECT / Data List.


        Powertrain > Engine and ECT > Data List
        Tester Display
        Vehicle Speed
        Engine Speed
        Coolant Temp
        Throttle Sensor Position
        SPD (NT)
        A/T Oil Temperature 1
        Lock Up
        Shift Status

      4. When the following conditions are met, check that the difference between "Engine Speed" and "SPD (NT)" is 50 rpm or less.

        Lock-up Schedule
        Vehicle Speed 80 km/h (50 mph) or more
        Shift Status 6th gear
        Lock Up ON

        Tech Tips


        • If Lock Up does not change to ON, decrease the accelerator pedal opening angle or increase the vehicle speed.

        • Lock-up will not be engaged if the accelerator pedal is released.

        • Lock-up prohibition conditions:


          • Engine coolant temperature is less than 60°C (140°F)

          • Vehicle is being driven with the S1, S2 or S3 range selected

          • Throttle valve is fully closed

          • Stop light switch is on

    4. Manual down-shift permission speed


      1. Manual down-shift is permitted for each shift status when the vehicle speed is below the corresponding range shown in the following table.

      2. Shift schedule when throttle valve is fully open