[23A] AUTOMATIC TRANSMISSION (FF) - - ON-VEHICLE SERVICE - HYDRAULIC PRESSURE TESTS | PRINT PAGE / INDEX / PRIOR / NEXT

| HYDRAULIC PRESSURE TESTS
| CAUTION The transmission fluid temperature should be between 70 - 80°C during the test. Check the transmission fluid level, temperature and engine coolant temperature. Transmission fluid level: HOT mark on the dipstick Transmission fluid temperature: 70 - 80°C Engine coolant temperature: 80 - 100°C Raise the vehicle so that the wheels are free to turn.
| Connect the special tools (oil pressure gauge (3.0 MPa) [MD998330] and adapters [MD998332, MD998900]) to each pressure discharge port. NOTE: 2ND: Second brake pressure port UD: Underdrive clutch pressure port LR: Low-reverse brake pressure port DR: Torque converter release pressure port DA: Torque converter apply pressure port RV: Reverse clutch pressure port OD: Overdrive clutch pressure port RED: Reduction brake pressure port <5A/T> DIR: Direct clutch pressure port <5A/T> Restart the engine. Check that there are no leaks around the special tool port adapters. Measure the hydraulic pressure at each port under the conditions given in the standard hydraulic pressure table, and check that the measured values are within the standard value ranges. If the pressure is not within the standard value, stop the engine and refer to the hydraulic pressure test diagnosis table. Remove the O-ring from the port plug and replace it. Remove the special tool, and install the plugs to the hydraulic pressure ports. Start the engine and check that there are no leaks around the plugs.
STANDARD HYDRAULIC PRESSURE TABLE
<4A/T>
Measurement condition | Standard hydraulic pressure MPa
--- | ---
Selector lever position | Shift position | Engine speed (r/min) | Underdrive clutch pressure [UD] | Reverse clutch pressure [RV] | Overdrive clutch pressure [OD] | Low- reverse brake pressure [LR] | Second brake pressure [2ND] | Torque converter pressure [DR]
P | - | 2,500 | - | - | - | 0.31 - 0.39 | - | 0.25 - 0.39
R | Reverse | 2,500 | - | 1.27 - 1.77 | - | 1.27 - 1.77 | - | 0.50 - 0.70
N | - | 2,500 | - | - | - | 0.31 - 0.39 | - | 0.25 - 0.39
Sport mode | 1st gear | 2,500 | 1.01 - 1.05 | - | - | 1.01 - 1.05 | - | 0.50 - 0.70
2nd gear | 2,500 | 1.01 - 1.05 | - | - | - | 1.01 - 1.05 | 0.50 - 0.70
3rd gear | 2,500 | 0.78 - 0.88 | - | 0.78 - 0.88 | - | - | -
4th gear | 2,500 | - | - | 0.78 - 0.88 | - | 0.78 - 0.88 | -
NOTE: When the torque converter pressure is measured, the engine speed should be 1,500 r/min or less.
<5A/T>
Measurement condition | Standard hydraulic pressure MPa
--- | ---
Selector lever position | Shift position | Engine speed (r/min) | Underdrive clutch pressure [UD] | Reverse clutch pressure [RV] | Overdrive clutch pressure [OD] | Direct clutch pressure [DIR] | Low- reverse brake pressure [LR] | Second brake pressure [2ND] | Reduction brake pressure [RED] | Torque converter pressure [DR]
P | - | 2,500 | - | - | - | - | 0.26 - 0.34 | - | 0.26 - 0.34 | 0.22 - 0.36
R | Reverse | 2,500 | - | 1.27 - 1.77 | - | - | 1.27 - 1.77 | - | 1.27 - 1.77 | 0.50 - 0.70
N | - | 2,500 | - | - | - | - | 0.26 - 0.34 | - | 0.26 - 0.34 | 0.22 - 0.36
Sport mode | 1st gear | 2,500 | 1.01 - 1.05 | - | - | - | 1.01 - 1.05 | - | 1.01 - 1.05 | 0.50 - 0.70
2nd gear | 2,500 | 1.01 - 1.05 | - | - | - | - | 1.01 - 1.05 | 1.01 - 1.05 | 0.50 - 0.70
3rd gear | 2,500 | 0.78 - 0.88 | - | 0.78 - 0.88 | - | - | - | 0.78 - 0.88 | 0.50 - 0.70
4th gear | 2,500 | 0.78 - 0.88 | - | 0.78 - 0.88 | 0.78 - 0.88 | - | - | - | -
5th gear | 2,500 | - | - | 0.78 - 0.88 | 0.78 - 0.88 | - | 0.78 - 0.88 | - | -
NOTE: When the torque converter pressure is measured, the engine speed should be 1,500 r/min or less.
HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE
Trouble symptom | Probable cause
--- | ---
All hydraulic pressures are high. | Malfunction of the regulator valve
All hydraulic pressures are low. | Malfunction of the oil pump
Clogged internal oil filter
Clogged oil cooler
Malfunction of the regulator valve
Malfunction of the relief valve
Incorrect valve body installation
Improperly installed solenoid valves
Damaged solenoid valve O-rings
Hydraulic pressure is abnormal in reverse gear only. | Malfunction of the regulator valve
Clogged orifice
Incorrect valve body installation
Hydraulic pressure is abnormal in 3rd or 4th gear only. | Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction of the regulator valve
Malfunction of the switch valve
Clogged orifice
Incorrect valve body installation
Only underdrive clutch hydraulic pressure is abnormal. | Malfunction of the oil seal K
Malfunction of the oil seal L
Malfunction of the oil seal M
Malfunction of the underdrive solenoid valve
Malfunction of the underdrive pressure control valve
Malfunction of the check ball
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for underdrive clutch
Only reverse clutch hydraulic pressure is abnormal. | Malfunction of the oil seal A
Malfunction of the oil seal B
Malfunction of the oil seal C
Clogged orifice
Incorrect valve body installation
Only overdrive clutch hydraulic pressure is abnormal. | Malfunction of the oil seal D
Malfunction of the oil seal E
Malfunction of the oil seal F
Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction of the check ball
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for overdrive clutch
Only direct clutch hydraulic pressure is abnormal. <5A/T> | Malfunction of the oil seal P
Malfunction of the oil seal Q
Malfunction of the oil seal R
Malfunction of the low-reverse solenoid valve
Malfunction of the low-reverse pressure control valve
Malfunction of the switch valve
Malfunction of the fail safe valve C
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for direct clutch
Only low-reverse brake hydraulic pressure is abnormal. | Malfunction of the oil seal I
Malfunction of the oil seal J
Malfunction of the low-reverse solenoid valve
Malfunction of the low-reverse pressure control valve
Malfunction of the switch valve
Malfunction of the fail safe valve A
Malfunction of all the check balls
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for low-reverse brake
Only second brake hydraulic pressure is abnormal. | Malfunction of the oil seal G
Malfunction of the oil seal H
Malfunction of the oil seal O
Malfunction of the second solenoid valve
Malfunction of the second pressure control valve
Malfunction of the fail safe valve B
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for second brake
Only reduction brake hydraulic pressure is abnormal. <5A/T> | Malfunction of the oil seal S
Malfunction of the oil seal T
Malfunction of the reduction solenoid valve
Malfunction of the reduction pressure control valve
Clogged orifice
Incorrect valve body installation
Malfunction of the accumulator for reduction brake
Only torque converter pressure is abnormal. | Clogged oil cooler
Malfunction of the oil seal N
Malfunction of the damper clutch control solenoid
Malfunction of the damper clutch pressure control valve
Clogged orifice
Incorrect valve body installation
Pressure applied to element which should not receive pressure. | Incorrect transmission control cable adjustment
Malfunction of the manual valve
Malfunction of the check ball
Incorrect valve body installation
OIL SEAL LAYOUT <4A/T> <5A/T>

[23A] AUTOMATIC TRANSMISSION (FF) - - ON-VEHICLE SERVICE - HYDRAULIC PRESSURE TESTS | PRINT PAGE / INDEX / PRIOR / NEXT

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