Mechanical System Tests

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: MECHANICAL SYSTEM TESTS

MECHANICAL SYSTEM TESTS

1. STALL SPEED TEST
HINT: This test is to check the overall performance of the engine and transmission.
CAUTION:
- 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.
NOTE: 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 80 to 120°C (176 to 248°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 the D position.
(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:
2300 +/- 150 rpm

Evaluation:





NOTE: Perform the test at the normal operating ATF temperature of 80 to 120°C (176 to 248°F).

2. SHIFT TIME LAG TEST
HINT: This test is to check the condition of the direct clutch, forward clutch, 1st brake and reverse brake.

(a) Connect the Techstream to the DLC3.
(b) Run the vehicle until the transmission fluid temperature has reached 80 to 120°C (176 to 248°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 range 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 procedures above 3 times, and calculate the average time of the 3 tests.
(f) Check the R range 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 procedures above 3 times, and calculate the average time of the 3 tests.
Standard value:
D range time lag is less than 0.8 seconds
R range time lag is less than 1.2 seconds

Evaluation: