Mechanical System Tests

AA80E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: MECHANICAL SYSTEM TESTS

1. STALL SPEED TEST

HINT
This test is to check the overall performance of the engine and transmission.

CAUTION:
* The driving test should be done on a paved surface (a surface that is not slippery).
* To ensure safety, perform this test in an open and level area that provides good traction.
* The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
NOTICE:
Do not perform the stall speed test for longer than 5 seconds.

(a) Connect the Techstream to the DLC3.

(b) Run the vehicle until the transmission fluid temperature has reached 60 to 110°C (140 to 230°F).

(c) Allow the engine to idle with the air conditioning and headlights OFF.

(d) Chock all 4 wheels.

(e) Set the parking brake and keep the brake pedal depressed firmly with your left foot.

(f) Move the shift lever to D.

(g) Depress the accelerator pedal as much as possible with your right foot.

(h) Read the engine rpm (stall speed) and release the accelerator pedal immediately.

Standard value:

2225 +/- 150 rpm

Evaluation





NOTICE:
Perform the test at a normal operating ATF temperature of 60 to 110°C (140 to 230°F).

2. SHIFT TIME LAG TEST

HINT
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 clutch, and brake.

(a) Connect the Techstream to the DLC3.

(b) Run the vehicle until the transmission fluid temperature has reached 60 to 110°C (140 to 230°F).

(c) Allow the engine to idle with the air conditioning OFF.

(d) Set the parking brake and keep the brake pedal depressed firmly.

(e) Check the D position time lag.

(1) Move the shift lever to N and wait for 1 minute.

(2) Move the shift lever to D and measure the time until the shock is felt.

(3) Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.

(f) Check the R position time lag.

(1) Move the shift lever to N and wait for 1 minute.

(2) Move the shift lever to R and measure the time until the shock is felt.

(3) Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.

Standard value:

D position time lag is less than 0.8 seconds

R position time lag is less than 1.2 seconds

Evaluation