Mechanical System Tests

U340E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: MECHANICAL SYSTEM TESTS

MECHANICAL SYSTEM TESTS

1. STALL SPEED TEST
HINT: This test is to check the overall performance of the engine and transaxle by measuring the stall speeds in the D position.
NOTICE:
- Do not perform the stall speed test for longer than 5 seconds.
- To ensure safety, perform this test in a wide, clear level area which provides good traction.
- The stall speed test must always be carried out by pairs of technicians. One technician must watch the wheels and wheel stoppers from outside the vehicle to make sure they do not slip, while the other performs the test.

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data.
(e) Run the vehicle until the ATF (Automatic Transmission Fluid) temperature reaches 50° to 80°C (122° to 176°F).
(f) Allow the engine to idle with the air conditioning OFF.
(g) Chock all 4 wheels.
(h) Set the parking brake and keep the brake pedal firmly depressed with your left foot.
(i) Shift the shift lever to the D position.
(j) Depress the accelerator pedal all the way down with your right foot.
(k) Read the engine rpm (stall speed) and release the accelerator pedal immediately.
Standard value:
1850 to 2450 rpm

Evaluation:





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

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data.
(e) Run the vehicle until the ATF (Automatic Transmission Fluid) temperature reaches 50° to 80°C (122° to 176°F).
(f) Allow the engine to idle with the air conditioning OFF.
(g) Set the parking brake and keep the brake pedal firmly depressed with your left foot.
(h) Check the D position time lag.
(1) Shift the shift lever into the N position and wait for 1 minute. (*1)
(2) Shift the shift lever into the D position and measure the time until the shock is felt. (*2)
(3) Repeat procedures (*1) and (*2) three times, and calculate the average time of the three tests.
(i) Check the R position time lag.
(1) Shift the shift lever into the N position and wait for 1 minute. (*3)
(2) Shift the shift lever into the R position and measure the time until the shock is felt. (*4)
(3) Repeat procedures (*3) and (*4) three times, and calculate the average time of the three tests.
Standard value:
D position time lag is less than 1.2 seconds
R position time lag is less than 1.5 seconds

Evaluation :