Hydraulic Pressure Tests: Notes
CAUTION:
Parking and service brakes must be applied throughout hydraulic pressure test. Total time for testing with vehicle in any driving gear should not exceed 2 minutes. Transaxle damage may occur.
- Before performing hydraulic pressure tests, check fluid level and condition. Check manual control linkages for correct adjustment, and ensure engine is properly tuned.
- Connect tachometer to engine, hand-held vacuum pump to vacuum modulator and oil pressure gauge to line pressure test port. See Figure . Check line pressure at specified engine RPM. See LINE PRESSURE SPECIFICATIONS table.
NOTE:
Hydraulic pressure is controlled by pump output and regulated by pressure regulator valve. Line pressure is boosted by reverse boost valve when gear selector is in "R" and "D1" positions. Line pressure should increase with throttle opening due to decrease in engine vacuum to modulator.