MECHANICAL SYSTEM TEST [FS5A-EL]
id051721802100
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.)
2. Perform the line pressure test at the engine idle speed for D range.
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3. Perform the line pressure test at the engine idle speed for each position/range in the same manner.
4. Stop the engine.
5. Perform the line pressure test at engine stall speed for D range.
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}) |
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---|---|---|---|
LF |
L5 |
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D, M (1GR, 2GR)
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Idle
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330—470 {3.4—4.7, 48—68}
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Stall
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1,200—1,320 {12.24—13.46, 174.1—191.4}
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R
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Idle
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490—710 {5.0—7.2, 71—102}
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Stall
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1,630—1,930 {16.63—19.68, 236.4—279.9}
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1,850—2,120 {18.87—21.61, 268.4—307.4}
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Evaluation of line pressure test
Condition |
Possible cause |
---|---|
Low pressure in all position/ranges
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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
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Low pressure in D, M (1GR, 2GR) ranges
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Oil leaking from forward clutch hydraulic circuit
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Low pressure in M (2GR) range
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Oil leaking from 2-4 brake band hydraulic circuit
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Low pressure in M (1GR) range, R position
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Oil leaking from low and reverse brake hydraulic circuit
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Low pressure in R position
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Oil leaking from reverse clutch hydraulic circuit
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Higher pressure in all position/ranges
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Pressure control solenoid A malfunction and/or open harness
Pressure regulator valve stuck
TCM malfunction
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7. Stop the engine.
8. Remove the SSTs.
9. Install a new square head plug in the inspection port.
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.
4. Perform the stall test for each position/range in the same manner.
Engine stall speed
Position/Range |
Specification (rpm) |
|
---|---|---|
LF |
L5 |
|
D,M (1GR, 2GR)
|
2,200—2,800
|
2,400—3,000
|
R
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Evaluation of stall test
Condition |
Possible cause |
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---|---|---|---|
Above specification
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In all position/ranges
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Insufficient line pressure
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• Worn oil pump
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• Oil leaking from oil pump, control valve, and/or transaxle case
|
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• Pressure regulator valve sticking
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• Converter relief valve sticking
|
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• Pressure control solenoid A malfunction
|
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In D, M (1GR, 2GR) ranges
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• Forward clutch slipping
|
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In D range
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• One-way clutch No.1 malfunction
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In D, M (2GR) ranges
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• 2-4 brake band slipping
• One-way clutch No.1 malfunction
|
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In D, M (1GR) ranges
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• Low and reverse brake slipping
• One-way clutch No.1 malfunction
|
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In R position
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• Low and reverse brake slipping
• Reverse clutch slipping
• Perform road test to determine whether problem is in low and reverse brake or reverse clutch
|
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Below specification
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• Engine lack of power
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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.
4. Perform the time lag test when shifting the selector lever from N position to R position in the same manner.
Evaluation of time lag test
Condition |
Possible Cause |
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---|---|---|
N → D shift
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More than specification
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Low line pressure
Forward clutch slipping
Oil leaking from forward clutch fluid circuit
Shift solenoid A not operating properly
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Less than specification
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Forward accumulator not operating properly
Shift solenoid A not operating properly
Excessive line pressure
|
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N → R shift
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More than specification
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Insufficient line pressure
Low and reverse brake slipping
Reverse clutch slipping
Shift solenoid B not operating properly
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Less than specification
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Servo apply accumulator not operating properly
Shift solenoid B not operating properly
Excessive line pressure
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