Automatic Transmission System (For 1Gr-Fe) Road Test

  1. PROBLEM SYMPTOM CONFIRMATION

  1. ROAD TEST

Automatic Transmission System (For 1Gr-Fe) -- Road Test



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 or down, or that the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and attempt to duplicate the problem symptoms.


ROAD TEST

  1. Perform a road test.

    CAUTION:
    Check for safety before performing any tests.
    NOTICE:
    1. Be sure to inspect and adjust the engine before performing these tests.
    2. Perform the road test with the engine coolant temperature is 70°C (158°F) or higher and the ATF temperature between 40 and 110°C (104 and 230°F).
    3. 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 between S ranges properly.
    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.
    HINT:
    When checking for DTCs after a repair, drive the vehicle according to the monitor drive pattern (LandCruiser RM000000W7K0USX.html).

  2. Shift schedule confirmation

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed, Accelerator Position and Shift Status.

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

      Shift Schedule Chart
      Accelerator Position
      		6%
      Shift Status
      (Shift Lever in D)
      		1st to 2nd
      		2nd to 3rd
      		3rd to 4th
      		4th to 5th
      		5th to 6th
      Vehicle Speed
      		5 to 15 km/h
      (3 to 9 mph)
      		15 to 25 km/h
      (9 to 16 mph)
      		25 to 35 km/h
      (16 to 22 mph)
      		40 to 50 km/h
      (25 to 31 mph)
      		60 to 70 km/h
      (37 to 43 mph)

      NOTICE:
      1. 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.
      2. 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 GTS indication.

  3. Lock-up confirmation

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed, Engine Speed, Accelerator Position, SPD (NT), A/T Oil Temperature 1, Lock Up and Shift Status.

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

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

      HINT:
      Lock-up prohibition conditions:
      1. A/T oil temperature is below 40°C (104°F)
      2. Engine coolant temperature is below 70°C (158°F)
      3. Shift range between "1" (S1 range) and "3" (S3 range)
      4. Accelerator pedal is fully released
      5. Stop light switch signal 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.

      Manual Down-shift Permission Speed Chart
      Shift Status
      (Shift Lever in S)
      		S6 to S5
      		S5 to S4
      		S4 to S3
      		S3 to S2
      		S2 to S1
      Vehicle Speed
      		275 to 290 km/h
      (171 to 180 mph)
      		190 to 205 km/h
      (118 to 127 mph)
      		125 to 140 km/h
      (78 to 87 mph)
      		85 to 95 km/h
      (53 to 59 mph)
      		40 to 50 km/h
      (25 to 31 mph)

  5. Shift schedule when accelerator pedal is fully depressed

    Shift Schedule Chart
    Accelerator Pedal
    		Fully Depressed
    Shift Status
    (Shift Lever in D)
    		1st to 2nd
    		2nd to 3rd
    		3rd to 4th
    		4th to 5th
    		5th to 6th
    Vehicle Speed
    		40 to 50 km/h
    (25 to 31 mph)
    		85 to 95 km/h
    (53 to 59 mph)
    		125 to 140 km/h
    (78 to 87 mph)
    		190 to 205 km/h
    (118 to 127 mph)
    		255 to 270 km/h
    (158 to 168 mph)