CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM ROAD TEST

  1. PROBLEM SYMPTOM CONFIRMATION

    1. Try to reproduce symptoms based on the result of the customer problem analysis. If the problem is that the transaxle does not change gear ratios or changes ratios at the wrong engine speed, conduct the following road test while referring to the speed variation chart and attempt to duplicate the problem symptoms.

  2. ROAD TEST

    CAUTION:

    Strictly observe posted speed limits, traffic laws and road conditions when performing the road test.

    Note:

    • This test must be conducted after checking and confirming that the engine is operating normally.

    • Perform this test while the CVT fluid temperature is between 50 and 100°C (122 and 212°F).

    • Perform this test with the A/C off.

    Tip:

    • Lock-up control will not operate when the CVT fluid temperature is 40°C (104°F) or less and the vehicle speed is 60 km/h (37 mph) or less, or when the CVT fluid temperature is 5°C (41°F) or less.

    • Lock-up control will not operate when the engine coolant temperature is 30°C (86°F) or less.

    • The lock-up off vehicle speed may vary depending on electrical load, and air conditioning and brake operation.

    • Keep a constant accelerator pedal angle to maintain the specified vehicle speed.

    • When fully depressing the accelerator pedal, read the engine speed immediately after the pedal is fully depressed.

    Table 1. Speed Variation Chart

    Shift Lever Position

    Accelerator Pedal Position

    (Vehicle Speed)

    Fully Depressed

    (40 km/h (25 mph))

    *1

    Fully Depressed

    (70 km/h (43 mph))

    *2

    Fully Depressed

    (100 km/h (62 mph))

    *3

    Constant Position

    (40 km/h (25 mph))

    *5

    Constant Position

    (70 km/h (43 mph))

    *6

    Constant Position

    (100 km/h (62 mph))

    *4

    Fully Depressed

    (Accelerating from 70 km/h (43 mph))

    *7

    D

    5000 to 5600 rpm

    5800 to 6400 rpm

    5900 to 6600 rpm

    800 to 1300 rpm

    1300 to 1700 rpm

    1900 to 2400 rpm

    3000 rpm or more

    D (Sport Mode)

    5000 to 5600 rpm

    5800 to 6400 rpm

    5900 to 6600 rpm

    1000 to 1500 rpm

    2100 to 2500 rpm

    2800 to 3300 rpm

    3000 rpm or more
    Tip:

    When checking the engine speed at 70 km/h (43 mph) and 100 km/h (62 mph), check the engine speed directly before the transaxle up-shifts.

    Table 2. Lock-up Schedule

    Shift Lever Position

    Lock-up Condition

    (Accelerator Pedal Opening Amount)

    Lock-up On

    (5%)

    Lock-up Off

    (0%)

    D

    5 to 30 km/h

    (3 to 19 mph)

    10 to 20 km/h

    (6 to 12 mph)

    1. D position test

      Move the shift lever to D and check the following:

      1. Check if the gear ratio changes during normal driving (average urban driving).

        1. With the vehicle stopped, fully depress the accelerator pedal and check the engine speed when the vehicle reaches the vehicle speeds listed in *1, *2 and *3 in the speed variation chart.

        2. With the vehicle stopped, depress the accelerator pedal to a constant intermediate position and check the engine speed when the vehicle reaches the vehicle speed listed in *4 in the speed variation chart.

        3. Release the accelerator pedal and check the engine speed when the vehicle decelerates to the vehicle speed listed in *5 in the speed variation chart.

        4. Depress the accelerator pedal to a constant intermediate position again and check the engine speed when the vehicle reaches the vehicle speed listed in *6 in the speed variation chart.

        5. Fully depress the accelerator pedal and check the engine speed as the vehicle accelerates from the vehicle speed listed in *7 in the speed variation chart.

      2. Check for abnormal noises and vibration.

        Tip:

        The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc.

      3. Check for abnormal shock and slippage at kick-down.

      4. Check the lock-up mechanism.

    2. M position test

      Move the shift lever to M and check the following:

      1. Check the shift operation.

        • When driving with M7 selected (vehicle speed approximately 90 to 100 km/h (56 to 62 mph)), check the engine braking effect in M6 when the shift lever is moved to "-" or the "-" shift paddle is operated.

        • When driving with M6 selected (vehicle speed approximately 70 to 80 km/h (43 to 50 mph)), check the engine braking effect in M5 when the shift lever is moved to "-" or the "-" shift paddle is operated.

        • When driving with M5 selected (vehicle speed approximately 50 to 60 km/h (31 to 37 mph)), check the engine braking effect in M4 when the shift lever is moved to "-" or the "-" shift paddle is operated.

        • When driving with M4 selected (vehicle speed approximately 40 to 50 km/h (25 to 31 mph)), check the engine braking effect in M3 when the shift lever is moved to "-" or the "-" shift paddle is operated.

        • When driving with M3 selected (vehicle speed approximately 30 to 40 km/h (19 to 25 mph)), check the engine braking effect in M2 when the shift lever is moved to "-" or the "-" shift paddle is operated.

        • When driving with M2 selected (vehicle speed approximately 20 to 30 km/h (12 to 19 mph)), check the engine braking effect in M1 when the shift lever is moved to "-" or the "-" shift paddle is operated.

    3. R position test

      Move the shift lever to R and lightly depress the accelerator pedal. Check that the vehicle moves backward without any abnormal noise or vibration.

      CAUTION:

      Before conducting this test, make sure that the test area is free from people and obstructions.

    4. P position test

      Stop the vehicle on an incline (more than 5°). Then move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place.