Hydraulic Test

1. PREPARATION
a. Warm up the transmission fluid.
b. Remove the transmission case test plug and mount the hydraulic pressure gauge.
SST 09992-00094 Oil pressure gauge

CAUTION: Perform the test at normal operating fluid temperature (50 - 80 °C or 122 - 176 °F).




2. MEASURE LINE PRESSURE
a. Fully apply the parking brake and chock the four wheels.
b. Start the engine and check the idling rpm.
c. Shift into D range, step down strongly on the brake pedal with your left foot and while manipulating the accelerator pedal with the right foot, measure the line pressure at the engine speeds specified in table.
d. In the same manner, perform the test in R range.
e. If the measured pressures are not up to specified values, recheck the throttle cable adjustment and retest.

EVALUATION
a. If the measured values at all ranges are higher than specified:
- Throttle cable Out of adjustment
- Throttle valve defective
- Regulator valve defective

b. If the measured values at all ranges are lower than specified:
- Throttle cable out of adjustment
- Throttle valve defective
- Regulator valve defective
- Oil pump defective
- UD one-way clutch not operating properly

c. If pressure is low in D range only:
- D range circuit fluid leakage
- Forward clutch defective
- UD one-way clutch not operating properly

d. If pressure is low in R range only:
- R range circuit fluid leakage
- Direct clutch defective
- First and reverse brake defective
- UD one-way clutch not operating properly