Check the transmission fluid pressure is performed in order to determine the condition of hydraulic components and whether there are leaks.
Symptom | possible cause |
| All hydraulic high pressure | Incorrectly adjusted control cable transmission |
| Pressure control valve defective |
| All hydraulic pressure low | Incorrectly adjusted control cable transmission |
| Faulty oil pump |
| Dirty oil filter internal |
| Blocked oil cooler |
| Pressure control valve defective |
| Faulty relief valve |
| Improperly installed valve body |
| Hydraulic pressure is abnormally only at position selector ?«R?» | Pressure control valve defective |
| Opening is blocked |
| Improperly installed valve body |
| Hydraulic pressure is abnormally only at position selector "3" or "4" | Pressure control valve defective |
| Opening is blocked |
| Improperly installed valve body |
| Defective solenoid valve overdrive |
| Faulty pressure control valve overdrive |
| Faulty valve switch |
| Hydraulic pressure is abnormally only downshift | Damaged oil seal K |
| Damaged oil seal L |
| Damaged oil seal M |
| possible cause |
| Defective solenoid valve downshift |
| Faulty pressure control valve downshift |
| Damaged ball control |
| Opening is blocked |
| Improperly installed valve body |
| Hydraulic pressure is abnormally only in reverse gear clutch | A damaged oil seal |
| Damaged oil seal B |
| Damaged oil seal C |
| Opening is blocked |
| Improperly installed valve body |
| Hydraulic pressure is abnormally only in overdrive | Damaged oil seal D |
| Damaged oil seal E |
| Damaged oil seal F |
| Defective solenoid valve overdrive |
| Faulty pressure control valve overdrive |
| Damaged ball control |
| Opening is blocked |
| Improperly installed valve body |
Hydraulic pressure is abnormally only in low gears and reverse gear
| Damaged oil seal I |
| Damaged oil seal J |
| Defective solenoid valve low gears and reverse gear |
| Faulty low pressure regulating valve gear and reverse gear |
| Faulty valve switch |
| Faulty relief valve A |
| Damaged ball control |
| Opening is blocked |
| Improperly installed valve body |
Abnormally only secondary hydraulic pressure
| Damaged oil seal G |
| Damaged oil seal H |
| Damaged oil seal O |
| Defective solenoid valve secondary |
| Faulty secondary pressure control valve |
| Faulty safety valve |
| Opening is blocked |
| Improperly installed valve body |
Abnormally only the hydraulic pressure clutch reverse gear
| Damaged oil cooler |
| Damaged oil seal N |
| Faulty solenoid clutch control damper |
| Faulty damper clutch control valve |
| Faulty pressure control valve torque converter |
| Opening is blocked |
Pressure is applied not to a functioning element | Improperly installed valve body |
| Incorrectly adjusted control cable transmission |
| Damaged valve |
| Damaged ball control |