Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Road Test

ROAD TEST

PROBLEM SYMPTOM CONFIRMATION

(a) 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

CAUTION:

• Strictly obey all traffic rules and regulations.
• Do not drive the vehicle with the Techstream cable contacting the pedals, shift lever or steering wheel.
• Driving the wheel with the Techstream cable contacting these areas could impede vehicle control, resulting in a serious accident.

• Do not operate the Techstream while driving the vehicle.
• Operating the Techstream while driving the vehicle will prevent you from paying sufficient attention to vehicle surroundings, and could result in a serious accident.

NOTICE:

• 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 gear and then back again.
  S Position Test	While driving with the shift lever in S, move the shift lever to "+" and "-". Check that the meter display changes accordingly.
  D Position Shift Test	While driving the vehicle normally, check that the transaxle 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.

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(a) Gear change confirmation

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Enter the following menus: Powertrain / Transmission / Data List.

(4) Check that the transaxle shifts to each gear while gently accelerating to 85 km/h (53 mph) or higher.

HINT:

• Check that the value of NT Sensor Speed drops by 50 rpm or more when the value of Shift Status increases.
• Depending on the engine speed when the gear is changed, it may be difficult to see the change of NT Sensor Speed.

(b) Lock-up confirmation

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Enter the following menus: Powertrain / Transmission / Data List.

(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:

HINT:

• If Lock Up Status does not change to ON, decrease the accelerator pedal opening angle or increase the vehicle speed.
• Lock-up will not be engaged if the accelerator pedal is released.
• Lock-up prohibition conditions:
  • Engine coolant temperature is less than 20°C (68°F)
  • ATF temperature is less than 20°C (68°F) or higher than 110°C (230°F)
  • Throttle valve is fully closed
  • Stop light switch is on