- 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
CAUTION- 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.
- 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>
NOTE:
- 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>
)