Line Pressure Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1994 Toyota MR2, 1993 Toyota MR2, 1993 Toyota Celica, 1992 Toyota MR2, and 1992 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure transmission fluid is at operating temperature. Block wheels. Support vehicle on safety stands. Remove transmission case test plug(s). Install hydraulic pressure gauge(s). See Fig 1.
- Fully apply parking brake. Start engine. Apply brakes. Shift into "D" range.
- On A-241H, depress the accelerator. Note the pressure readings at idle and stall speed. Repeat test in "R" range. Compare the pressure readings to the specifications. Refer to COROLLA A-241H LINE PRESSURE SPECIFICATIONS table.
- If pressures exceed specifications in all ranges, regulator valve or throttle valve is faulty or throttle cable is out of adjustment.
- If pressures in all ranges are lower than specifications, oil pump, regulator valve, throttle valve or overdrive clutch is faulty or throttle cable is out of adjustment.
- If pressure is lower than specifications in "D" range only, forward clutch is faulty or "D" range circuit has a fluid leak.
- If pressure is lower than specifications in "R" range only, direct clutch is faulty, 1st and reverse brake is faulty or "R" range circuit has a fluid leak.
COROLLA A-241H LINE PRESSURE SPECIFICATIONS
| Selector Position | Pressure psi (kg/cm2 ) | |
|---|---|---|
| At Idle | ||
| "D" Range | 53-61 (3.7-4.3) | |
| "R" Range | 77-102 (5.4-7.2) | |
| AT WOT Stall | ||
| "D" Range | 131-152 (9.2-10.7) | |
| "R" Range | 205-239 (14.4-16.8) | |