Mechanical System Tests

PERFORM MECHANICAL SYSTEM TESTS

Measure the stall speed.

The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speeds in the D position.

NOTE:

The driving test should be done on a paved road (a non-skid road).
Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C(122 to 176°F).
Do not continuously run this test for longer than 5 seconds.
To ensure safety, perform this test in a wide, clear level area which provides good traction.
The stall test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers from a safe location outside the vehicle while the other is doing the test.

Chock the 4 wheels.
Connect Techstream to the DLC3.
Fully apply the parking brake.
Keep your left foot pressed firmly on the brake pedal.
Start the engine.
Using Techstream, shift into the D position and hold 3rd gear using active test. Press all the way down on the accelerator pedal with your right foot.

Quickly read the stall speed at this time.

Stall speed:

2650 +/- 200 RPM

Evaluation:

PROBLEM AND POSSIBLE CAUSE

Problem	Possible cause
(a) Stall engine speed is low in D position	Engine power output may be insufficient Stator one-way clutch is not operating properly HINT: If the value is less than the specified value by 600 RPM or more, the torque converter could be faulty.
(b) Stall engine speed is high in D position	Line pressure is too low Clutch No. 1 (C₁ ) slipping One-way clutch (F₁ ) is not operating properly Improper fluid level

Measure the time lag.

When the shift lever is shifted 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 clutches and brakes.
NOTE:
- Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F).
- Be sure to allow 1 minute interval between tests.
- Perform the test three times and measure the time lags. Calculate the average value of the three time lags.
Connect Techstream to the DLC3.
Fully apply the parking brake.
Start and warm up the engine and check idle speed.
Idle speed:

approx. 650 RPM (In N position and A/C OFF)
Shift the lever from the N to D position. Using a stop watch, measure the time from when the lever is shifted until the shock is felt.
Time lag:

N to D less than 1.2 seconds

In the same way, measure the time lag for N to R.

Time lag:

N to R less than 1.5 seconds

Evaluation (If N to D or N to R time lag is longer than the specified time):

PROBLEM AND POSSIBLE CAUSE

Problem	Possible cause
N to D time lag is longer	Line pressure is too low Clutch No. 1 (C₁ ) is worn One-way clutch (F₁ ) is not operating property
N to R time lag is longer	Line pressure is too low Brake No 2 (B₂ ) is worn Brake No. 3 (B₃ ) is worn