AUTOMATIC TRANSMISSION 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 transmission 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:

    Strictly observe posted speed limits, traffic laws and road conditions when performing the 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 40 and 110°C (104 and 230°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 M and return it to D. Check that the meter display changes from D to the appropriate M and then back again.
      M Position Test While driving with the shift lever in M, operate the shift paddle 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). Then 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


    1. Shift schedule confirmation


      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

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


        Powertrain > ECT > Data List
        Tester Display
        Vehicle Speed
        Coolant Temp
        Throttle Position from EFI
        Shift Status

      4. Check that the "Shift Status" changes in accordance with the "Vehicle Speed" as shown in the following table.

        Shift Schedule Chart
        Throttle Position from EFI 6%

        Shift Status

        (Shift Lever in D)

        		 1st to 2nd 2nd to 3rd 3rd to 4th 4th to 5th 5th to 6th 6th to 7th 7th to 8th
        Vehicle Speed

        5 to 15 km/h

        (3 to 9 mph)

        10 to 20 km/h

        (6 to 12 mph)

        20 to 30 km/h

        (12 to 19 mph)

        30 to 40 km/h

        (19 to 25 mph)

        40 to 50 km/h

        (25 to 31 mph)

        55 to 65 km/h

        (34 to 40 mph)

        65 to 70 km/h

        (40 to 44 mph)

        Note


        • All vehicle speeds indicated in the above table are actual values. Therefore, if checking a shift point with a chassis dynamometer, keep in mind that there is a margin of error in the chassis dynamometer indication.

        • If checking a shift point against the vehicle speed indicated on the speedometer, remember to consider the speedometer correction rate and margin of error in the tester indication.

    2. Lock-up confirmation


      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

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


        Powertrain > ECT > Data List
        Tester Display
        Vehicle Speed
        Engine Speed
        Coolant Temp
        Throttle Position from EFI
        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
        Throttle Position from EFI 6%
        Vehicle Speed 80 km/h (50 mph) or more
        Shift Status 8th gear
        Lock Up ON

        Tech Tips

        Lock-up prohibition conditions:


        • A/T oil temperature is less than 40°C (104°F)

        • Engine coolant temperature is less than -35°C (-31°F)

        • D1, D2, D3, D4 or D5 is selected

        • Throttle valve is fully closed

        • Stop light switch is on

    3. 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.

        Manual Down-shift Permission Speed Chart

        Shift Status

        (Shift Lever in M)

        		 M8 to M7 M7 to M6 M6 to M5 M5 to M4 M4 to M3 M3 to M2 M2 to M1
        Vehicle Speed

        340 to 355 km/h

        (211 to 221 mph)

        280 to 295 km/h

        (174 to 183 mph)

        225 to 235 km/h

        (140 to 146 mph)

        185 to 200 km/h

        (115 to 124 mph)

        145 to 155 km/h

        (90 to 96 mph)

        90 to 105 km/h

        (56 to 66 mph)

        40 to 50 km/h

        (25 to 31 mph)

    4. Shift schedule when throttle valve is fully open

      Shift Schedule Chart
      Throttle Valve Opening Fully Open

      Shift Status

      (Shift Lever in D)

      		 1st to 2nd 2nd to 3rd 3rd to 4th 4th to 5th 5th to 6th 6th to 7th 7th to 8th
      Vehicle Speed

      55 to 70 km/h

      (34 to 44 mph)

      100 to 110 km/h

      (62 to 68 mph)

      150 to 165 km/h

      (93 to 103 mph)

      185 to 200 km/h

      (115 to 124 mph)

      230 to 240 km/h

      (143 to 149 mph)

      280 to 290 km/h

      (174 to 180 mph)

      340 to 355 km/h

      (211 to 221 mph)