Test Procedure

Connect pressure gauge to line pressure test port. See Figure . Start engine. Apply service and parking brakes. Check pressure in all gears. See LINE PRESSURE SPECIFICATIONS (PSI) TABLE  . If line pressure is not within specification, perform appropriate electronic test. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. If no electronic faults are present, perform air pressure test. See AIR PRESSURE TEST  . Service valve body or pump as required. See LINE PRESSURE DIAGNOSIS  .