Hydraulic Pressure Test Diagnosis Table
HYDRAULIC PRESSURE TEST DIAGNOSIS CHART
| Trouble symptom | Probable cause |
|---|---|
| All hydraulic pressures are high | Incorrect transmission control cable adjustment |
| Malfunction of the regulator valve | |
| All hydraulic pressures are low | Incorrect transmission control cable adjustment |
| Malfunction of the oil pump | |
| Clogged oil filter | |
| Clogged oil cooler | |
| Malfunction of the regulator valve | |
| Malfunction of the relief valve | |
| Incorrect valve body installation | |
| Hydraulic pressure is abnormal in "R" range only | Malfunction of the regulator valve |
| Clogged orifice | |
| Incorrect valve body installation | |
| Hydraulic pressure is abnormal in "3" or "4" range only | Malfunction of the regulator valve |
| Clogged orifice | |
| Incorrect valve body installation | |
| 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 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 check ball | |
| Clogged orifice | |
| Incorrect valve body installation | |
| 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 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 check ball | |
| Clogged orifice | |
| Incorrect valve body installation | |
| Only low and reverse hydraulic pressure is abnormal | Malfunction of the oil seal 1 |
| Malfunction of the oil seal J | |
| Malfunction of the low and reverse solenoid valve | |
| Malfunction of the low and reverse pressure control valve | |
| Malfunction of the switch valve | |
| Malfunction of the fail safe valve A | |
| Malfunction of check ball | |
| Clogged orifice | |
| Incorrect valve body installation | |
| Only second hydraulic pressure is abnormal | Malfunction of the oil seal G |
| Malfunction of the oil seal H | |
| Malfunction of the oil seal 0 | |
| 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 | |
| Only reverse clutch hydraulic pressure is abnormal | Malfunction of the oil cooler |
| Malfunction of the oil seal N | |
| Malfunction of the damper clutch control solenoid valve | |
| Malfunction of the damper clutch control valve | |
| Malfunction of the torque converter pressure control valve | |
| Clogged orifice | |
| Pressure applied to non operating element | Incorrect valve body installation |
| Incorrect transmission control cable adjustment | |
| Malfunction of the manual valve | |
| Malfunction of check ball | |
| Incorrect valve body installation |