MECHANICAL SYSTEM TEST [FS5A-EL]

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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 levels. (See COOLING SYSTEM SERVICE WARNINGS [L8, LF, L5].)

3. Inspect the engine oil levels. (See ENGINE COOLANT LEVEL INSPECTION [L8, LF, L5].)

4. Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].)

5. Inspect the idle speed. (See ENGINE TUNE-UP [L8, LF, L5].)

6. Inspect the ignition timing. (See ENGINE TUNE-UP [L8, LF, L5].)

Line Pressure Test

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. Perform the line pressure test at the engine idle speed for D range.

(1) Remove the square-head plug from line pressure inspection port.

(2) Connect the SSTs (49 H019 002 and, 49 0378 400C) to the line pressure inspection port.

(3) Replace the gauge of the SST (49 0378 400C) with the SST (49 B019 901B).

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(4) Start the engine.

(5) Warm up the automatic transaxle.

(6) Shift the selector lever to D range.

(7) Read the line pressure at the engine idle speed for D range.

3. Perform the line pressure test at the engine idle speed for each position/range in the same manner.

4. Stop the engine.

Note

• Replace the SST according to the line pressure.

― 49 B019 901B: for 0—1,000 kPa

― 49 B019 902A: for 0—2,500 kPa

5. Perform the line pressure test at engine stall speed for D range.

(1) Replace the SST (49 B019 901B) with the gauge of the SST (49 0378 400C).

(2) Start the engine.

(3) Firmly depress the brake pedal with the left foot.

(4) Shift the selector lever to D range.

Caution

• If the accelerator pedal is pressed for longer than 5 seconds while the brake pedal is pressed, the transaxle could be damaged. Therefore, perform Steps (5)—(6) within 5 seconds.

(5) Gradually depress the accelerator pedal with the right foot.

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

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

6. Perform the line pressure test at the engine stall speed for each position/range in the same manner.

Line pressure

Position/Range		Specification (kPa {kgf/cm², psi})
Position/Range		LF	L5
D, M (1GR, 2GR)	Idle	330—470 {3.4—4.7, 48—68}
D, M (1GR, 2GR)	Stall	1,200—1,320 {12.24—13.46, 174.1—191.4}
R	Idle	490—710 {5.0—7.2, 71—102}
R	Stall	1,630—1,930 {16.63—19.68, 236.4—279.9}	1,850—2,120 {18.87—21.61, 268.4—307.4}

Evaluation of line pressure test

Condition	Possible cause
Low pressure in all position/ranges	Worn oil pump Oil leaking from oil pump, control valve body, and/or transaxle case Pressure regulator valve stuck Pressure control solenoid A malfunction Solenoid reducing valve stuck
Low pressure in D, M (1GR, 2GR) ranges	Oil leaking from forward clutch hydraulic circuit
Low pressure in M (2GR) range	Oil leaking from 2-4 brake band hydraulic circuit
Low pressure in M (1GR) range, R position	Oil leaking from low and reverse brake hydraulic circuit
Low pressure in R position	Oil leaking from reverse clutch hydraulic circuit
Higher pressure in all position/ranges	Pressure control solenoid A malfunction and/or open harness Pressure regulator valve stuck TCM malfunction

7. Stop the engine.

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.

8. Remove the SSTs.

9. Install a new square head plug in the inspection port.

Tightening torque

4.8—9.8 N·m {49—99 kgf·cm, 43—86 in·lbf}

Stall Test

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

2. Start the engine.

3. Perform the stall test for D range.

(1) Firmly depress the brake pedal with the left foot.

(2) Shift the selector lever to D range.

Caution

• If the accelerator pedal is pressed for longer than 5 seconds while the brake pedal is pressed, the transaxle could be damaged. Therefore, perform Steps (3)—(4) within 5 seconds.

(3) Gently depress the accelerator pedal with the right foot.

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

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

4. Perform the stall test for each position/range in the same manner.

Engine stall speed

Position/Range	Specification (rpm)
Position/Range	LF	L5
D,M (1GR, 2GR)	2,200—2,800	2,400—3,000
R	2,200—2,800	2,400—3,000

Evaluation of stall test

Condition		Possible cause
Above specification	In all position/ranges	Insufficient line pressure	• Worn oil pump
			• Oil leaking from oil pump, control valve, and/or transaxle case
			• Pressure regulator valve sticking
			• Converter relief valve sticking
			• Pressure control solenoid A malfunction
	In D, M (1GR, 2GR) ranges	• Forward clutch slipping
	In D range	• One-way clutch No.1 malfunction
	In D, M (2GR) ranges	• 2-4 brake band slipping • One-way clutch No.1 malfunction
	In D, M (1GR) ranges	• Low and reverse brake slipping • One-way clutch No.1 malfunction
	In R position	• Low and reverse brake slipping • Reverse clutch slipping • Perform road test to determine whether problem is in low and reverse brake or reverse clutch ― Engine braking felt in M (1GR) range: Reverse clutch is defective. ― Engine braking not felt in M (1GR) range: Low and reverse brake is defective.
Below specification		• Engine lack of power

Time Lag Test

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

2. Start the engine.

3. Perform the time lag test when shifting the selector lever from N position to D range.

(1) Use a stopwatch to measure the time it takes from shifting until shock is felt when shifting the selector lever from N position to D range.

(2) Take three measurements for each test and take the average from the results using the following formula.

Formula:

Average time lag = (Time 1 + Time 2 + Time 3) / 3

4. Perform the time lag test when shifting the selector lever from N position to R position in the same manner.

Time lag

N position → D range: 0.4—0.7 s

N position → R position: 0.4—0.7 s

Evaluation of time lag test

Condition		Possible Cause
N → D shift	More than specification	Low line pressure Forward clutch slipping Oil leaking from forward clutch fluid circuit Shift solenoid A not operating properly
N → D shift	Less than specification	Forward accumulator not operating properly Shift solenoid A not operating properly Excessive line pressure
N → R shift	More than specification	Insufficient line pressure Low and reverse brake slipping Reverse clutch slipping Shift solenoid B not operating properly
N → R shift	Less than specification	Servo apply accumulator not operating properly Shift solenoid B not operating properly Excessive line pressure