Mechanical System Tests

MEASURE STALL SPEED
1. The purpose of this test is to check the overall performance of the transmission and engine by measuring the stall speeds when the shift lever is on D and R.
  NOTE:
  - Perform the test at the normal operating ATF temperature of 50 to 80°C (122 to 176°F).
  - Do not continuously run this test longer than 5 seconds.
  - To ensure safety, conduct this test in a wide, clear and level area with good traction.
  - The stall test should always be performed by at least 2 people. One person should observe the condition of the wheels or wheel chocks while the other is performing the test.
    
    Chock the 4 wheels.
    
    Connect the hand-held tester to the DLC3.
    
    Fully apply the parking brake.
    
    Keep your left foot firmly on the brake pedal.
    
    Start the engine.
    
    Move the shift lever to D. Fully press the accelerator pedal with your right foot and immediately read the stall speed.
    Stall speed: 2,450 +/- 150 rpm
    
    Perform steps ( 1) to ( 6) with the shift lever on R.
    Stall speed: 2,450 +/- 150 rpm
    
    Evaluation:
    
    Fig 1: Problem Cause Table (1 Of 2)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    HINT:
    
    *: If the value is higher or lower than the specified value by 600 rpm or more, the torque converter clutch may be malfunctioning.
MEASURE TIME LAG
1. When the shift lever is moved while the engine is idling, there will be a certain time lapse or lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, and 1st & reverse brake.
  NOTE:
  - Perform the test at the normal operating ATF temperature of 50 to 80°C (122 to 176°F).
  - Be sure to wait 1 minute between tests.
  - Perform each measurement 3 times and take the average value.
    
    Connect the hand-held tester to the DLC3.
    
    Fully apply the parking brake.
    
    Start the engine and check idle speed.
    Idle speed: approx. 700 rpm (shift lever on N and A/C OFF)
    
    Move the shift lever from N to D. Using a stopwatch, measure the time from when the lever is moved until the shock is felt.
    Time lag: N to D is less than 1.2 seconds
    
    In the same manner, measure the time lag for N to R.
    Time lag: N to R is less than 1.5 seconds
    
    Evaluation:
    
    Fig 2: Problem Cause Table (2 Of 2)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002