Hydraulic Pressure Tests
WARNING: This page is about a different car, the 2003 Toyota RAV4, 2002 Toyota RAV4, 2002 Toyota Highlander, 2001 Toyota RAV4, and 2001 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Perform test at normal operating fluid temperature of 122-176°F (50-80°C).
- Ensure transaxle fluid is at operating temperature. Raise and support vehicle. Remove transaxle case test plug. See Fig 1. Install hydraulic pressure gauge. Lower vehicle.
- Fully apply parking brake. Block all wheels. Start engine and ensure idle speed is 600-700 RPM. Shift transaxle into "D" position. Read and record pressure at idle. Fully apply brakes. Depress accelerator pedal to floor. DO NOT apply full throttle for more than 5 seconds.
- Measure highest line pressure. See LINE PRESSURE SPECIFICATIONS . Repeat test in "R" position. If pressures exceed specification in all ranges, regulator valve or control valve in upper valve body is defective. Ensure no Throttle Position (TP) sensor related DTCs are present.
- If pressures in both positions are lower than specification, oil pump, regulator valve or underdrive clutch is defective. Ensure no TP sensor related DTCs are present.
- If pressure is lower than specification in "D" position only, forward clutch is defective or "D" range circuit has a fluid leak. If pressure is lower than specification in "R" position only, direct clutch is defective, 1st/reverse brake is defective or "R" range circuit has a fluid leak.