СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ (для моделей с 1GR-FE) ДОРОЖНОЕ ИСПЫТАНИЕ

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.

   Note

   
   

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

   • Perform the road test with the engine coolant temperature is 60°C (140°F) or higher 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 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.

   Tech Tips

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

   Click here

2. Shift schedule confirmation

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

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

      
      Powertrain > Engine > Data List

      Tester Display
      Vehicle Speed
      Accelerator Position
      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)

      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 GTS indication.

3. Lock-up confirmation

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

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

      
      Powertrain > Engine > Data List

      Tester Display
      Vehicle Speed
      Engine Speed
      Accelerator Position
      SPD (NT)
      A/T Oil Temperature 1
      Lock Up
      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

      Tech Tips

      Lock-up prohibition conditions:

      
      

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

      • Engine coolant temperature is below 70°C (158°F)

      • Shift range between "1" (S1 range) and "3" (S3 range)

      • Accelerator pedal is fully released

      • 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 (Differential Gear Ratio: 3.583)

      Shift Status (Shift Lever in S)	S6 to S5	S5 to S4	S4 to S3	S3 to S2	S2 to S1
      Vehicle Speed	245 to 260 km/h (152 to 162 mph)	165 to 185 km/h (103 to 115 mph)	110 to 125 km/h (68 to 78 mph)	75 to 85 km/h (47 to 53 mph)	35 to 45 km/h (22 to 28 mph)

      Manual Down-shift Permission Speed Chart (Differential Gear Ratio: 3.909)

      Shift Status (Shift Lever in S)	S6 to S5	S5 to S4	S4 to S3	S3 to S2	S2 to S1
      Vehicle Speed	255 to 270 km/h (158 to 168 mph)	175 to 190 km/h (109 to 118 mph)	115 to 130 km/h (71 to 81 mph)	75 to 85 km/h (47 to 53 mph)	35 to 45 km/h (22 to 28 mph)

5. Shift schedule when accelerator pedal is fully depressed

   Shift Schedule Chart (Differential Gear Ratio: 3.583)

   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	35 to 45 km/h (22 to 28 mph)	75 to 85 km/h (47 to 53 mph)	110 to 125 km/h (68 to 78 mph)	165 to 185 km/h (103 to 115 mph)	245 to 260 km/h (152 to 162 mph)

   Shift Schedule Chart (Differential Gear Ratio: 3.909)

   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	35 to 45 km/h (22 to 28 mph)	80 to 90 km/h (50 to 56 mph)	115 to 130 km/h (71 to 81 mph)	175 to 190 km/h (109 to 118 mph)	255 to 270 km/h (158 to 168 mph)