TOYOTA ELECTRONIC TRANSMISSION CHECKS …（丰田电子传输检查u2026）.pdf

TOYOTA ELECTRONIC TRANSMISSION CHECKS DIAGNOSIS Checks and Adjustments The transmission requires regular maintenance intervals if it is to continue to operate without failure. As we discussed in previous sections, transmission fluid loses certain properties over time and especially due to heat. The Maintenance Schedules found in the repair manual or the Owners Manual indicate the appropriate replacement schedules based on how the vehicle is used. Schedule A for example, recommends replacement of the fluid every 20,000 miles or 24 months. Whereas Schedule B recommends just an inspection of the fluid every 15,000 miles or 24 months and no replacement interval. The chart below indicates which maintenance schedule to follow based on the use of the vehicle. Page 1 © Toyota Motor Sales, U.S.A., Inc. All Rights Reserved. TOYOTA ELECTRONIC TRANSMISSION CHECKS DIAGNOSIS Fluid Level The fluid level in the automatic transmission should be inspected by means of the dipstick after the transmission has been warmed up to ordinary operating temperature, approximately 158F to 176F. As a rule of thumb, if the graduated end is too hot to hold, the fluid is at operating temperature. The fluid level is proper if it is in the hot range between hot maximum and hot minimum. NOTE: The cool level found on the dip stick should be used as a reference only when the transmission is cold. The correct fluid level can only be found when the fluid is hot. It is important to keep the fluid at the correct level at all times to ensure proper operation of the automatic transmission. If the fluid level is too low, the oil pump will draw in air, causing air to mix with the fluid. Aerated fluid lowers the hydraulic pressure in the hydraulic control system, causing slippage and resulting in damage to clutches and bands. If the fluid level is excessive, planetary gears and other rotating c