MECHANICAL SYSTEM TEST[GF4AX-EL]

id051703802100

Mechanical System Test Preparation

1.  Engage the parking brake and use wheel chocks at the front and rear of the wheels.

2.  Inspect the engine coolant level. (See COOLING SYSTEM SERVICE WARNINGS[L3].) (See ENGINE COOLANT LEVEL INSPECTION[L3].)

3.  Inspect the engine oil level. (See ENGINE OIL LEVEL INSPECTION[L3].)

4.  Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[GF4AX-EL].)

5.  Inspect the ignition timing. (See ENGINE TUNE-UP[L3].)

6.  Inspect the idle speed. (See ENGINE TUNE-UP[L3].)

Line Pressure Test

1.  Engine idling.

(1)  Perform mechanical system test preparation. (See Mechanical System Test Preparation.)

Warning

•  Removing the square head plug when the ATF is hot can be dangerous. Hot ATF can come out of the opening and badly burn you. Before removing the square head plug, allow the ATF to cool.

(2)  Remove the square head plug as shown in the figure.

atraaw00001901

(3)  Connect the SSTs (49 H019 002, 49 B019 901B, and 49 0378 400C) to the line pressure inspection port.

atraaw00001902

(4)  Start the engine.

(5)  Shift the selector lever to D range and read the line pressure at idle.

ATF temperature

60—70 °C {140—158 °F}

Turn off all electrical loads

Position/Range	Line pressure (kPa {kgf/cm2, psi})
	Idle
D, 2, 1	412—539 {4.2—5.4, 60—78}
R	726—1,010 {7.4—10.2, 106—146}

(6)  Turn off the engine.

2.  Engine stall speed.

Caution

•  Perform the line pressure test at engine idling prior to performing the test at engine stall. If line pressure is low at idle do not perform the test at engine stall or further transaxle damage will occur.

(1)  Replace the SST (49 B019 901B) to the SST (49 B019 902).

(2)  Start the engine.

Caution

•  If the accelerator pedal is depressed for more than 5 s while the brake pedal is depressed, the transaxle could be damaged. Therefore, perform Steps 3 and 4 within 5 s.

(3)  Firmly depress the brake pedal with the left foot, and then gradually depress the accelerator pedal with the right foot.

(4)  When the engine speed no longer increases, quickly read the line pressure and release the accelerator pedal.

(5)  Shift the selector to N position and let the engine idle for 1 minute or more to cool the ATF.

(6)  Read the line pressure at idle and at the engine stall speed for the remaining ranges in the same manner.

•  2 range

•  1 range

•  R position

ATF temperature

60—70 °C {140—158 °F}

Turn off all electrical loads

Position/Range	Line pressure (kPa {kgf/cm2, psi})
	Stall
D, 2, 1	1,099—1,176 {11.2—11.9, 160—170}
R	1,903—2,029 {19.4—20.6, 276—294}

(7)  Shift the selector lever to P position.

(8)  Turn off the engine.

(9)  Remove the SSTs and install a new square head plug in the line pressure inspection port.

Tightening torque

4.9—9.8 N·m {50—99 kgf·cm, 44—85 in·lbf}

Evaluation of line pressure test

Stall Speed Test

Caution

•  Perform the line pressure test at engine idling prior to performing the test at engine stall. If line pressure is low at idle do not perform the test at engine stall or further transaxle damage will occur.

1.  Perform mechanical system test preparation. (See Mechanical System Test Preparation.)

2.  Start the engine.

3.  Shift the selector lever to D range.

Caution

•  If the accelerator pedal is depressed for more than 5 s while the brake pedal is depressed, the transaxle could be damaged. Therefore, perform Steps 4 and 5 within 5 s.

4.  Firmly depress the brake pedal with the left foot, and gently depress the accelerator pedal with the right foot.

5.  When the engine speed no longer increases, quickly read the engine speed and release the accelerator pedal.

6.  Shift the selector to N position and let the engine idle for 1 min or more to cool the ATF.

7.  Perform a stall test of the 2, 1 range and R position in the same manner as in Steps 3—6.

Position/Range	Engine stall speed (rpm)
D, 2, 1	2,000—2,500
R

8.  Turn off the engine.

Evaluation of stall test

Time Lag Test

1.  Perform mechanical system test preparation. (See Mechanical System Test Preparation.)

2.  Start the engine.

3.  Warm up the engine until the ATF temperature reaches 60—70°C {140—158°}.

4.  Shift the selector lever from N position to D range.

5.  Use a stopwatch to measure the time it takes from shifting until engagement is felt. Take three measurements for each test and average the results using the following formula.

6.  Perform the test for the following shifts in the same manner.

•  N position → P position

Evaluation of time lag test