AUTOMATIC TRANSAXLE SYSTEM 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 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.

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 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 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). 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 engine switch on (IG).

   3. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed, Throttle Sensor Position and Shift Status.

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

      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.

      Lock-up confirmation

      
      

      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

      3. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed, Engine Speed, Throttle Sensor Position, NT Sensor Speed, A/T Oil Temperature No. 1, Lock Up Status and Shift Status.

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

      Lock-up Schedule

      Throttle Sensor Position	9 +/- 1%
      Vehicle Speed	80 km/h (50 mph) or more
      Shift Status	6th gear
      Lock Up Status	ON