Control Valve Assembly: Inspection
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.
Inspect the valve springs for damage, squareness, rust and/or collapsed coils. Measure spring free height. Replace spring if any specification is exceeded. See UPPER VALVE BODY VALVE SPRING SPECIFICATIONS table.
UPPER VALVE BODY VALVE SPRING SPECIFICATIONS (A-241 SERIES)
| Application | Color Code | Free Length In. (mm) |
|---|---|---|
| Primary Regulator Valve | Purple | 2.626 (66.7) |
| Lock-Up Relay Valve | None | .740 (18.8) |
| 2nd Coast Modulator | Blue | 1.283 (32.6) |
| Downshift Plug | Blue | 1.181 (30.0) |
| Throttle Valve | Lt. Green | 1.150 (29.2) |
| Throttle Modulator Valve | Green | 1.177 (29.9) |
| Accumulator Control Valve | Yellow | 1.504 (38.2) |
| No. 2 Pressure Regulator Valve | Red | 1.157 (29.4) |
Inspect the valve springs for damage, squareness, rust and/or distorted coils. Measure the springs for free height. Replace springs if specification is exceeded. See LOWER VALVE BODY VALVE SPRING SPECIFICATIONS table.
LOWER VALVE BODY VALVE SPRING SPECIFICATIONS (A-241H)
| Application | Color Code | Free Length In. (mm) |
|---|---|---|
| Secondary Regulator Valve | Blue | 1.079 (27.4) |
| 1-2 Shift Valve | Yellow | 1.071 (27.2) |
| 2-3 Shift Valve | None | 1.091 (27.7) |
| 3-4 Shift Valve | None | 1.374 (34.9) |
| 3-4 Switch Valve | None | 1.217 (30.9) |
| Low Modulator Valve | None | 1.150 (29.2) |
| Cooler By-Pass Valve | Yellow | .720 (18.3) |
| Pressure Relief Valve | None | .441 (11.2) |
| Lock-Up Signal Valve | White | 1.630 (41.4) |
| Detent Regulator Valve | Brown | 1.260 (32.0) |