Automatic transmission failure

Automatic transmission failure Once the faulty automatic transmission, should be sent to plant maintenance, trouble-free operation can not be with, to avoid greater losses. Automatic transmission repair tools used auto lot, generally have the following: internal and external hex wrench,, socket, torque wrench, pliers, gun son, file, tap, bearings, bushings, locating ring clamp, electric wrench, ratchet, jack, security holder, electric lift, dial indicator, feeler gauge, multimeter, and the fault detector and so on. Auto repair turbine maintenance Automatic Transmission routine inspection items include: automatic transmission oil, oil level check, oil check, automatic transmission fluid leak checks, checks the engine throttle opening, gear selector lever gear check, automatic transmission of the control switching checks, the engine idle speed inspection. Fault diagnosis and testing procedures: a preliminary check fault code check → → Test → mechanical manual-shift hydraulic system test → test → test → check electronic control system and common cause failure analysis and troubleshooting. 1, according to the failure to analyze the phenomena, the failure to confirm the phenomenon. 2, if it is electronically controlled automatic transmission, and fault indicator light, read the first self-diagnostic fault codes, troubleshooting codes represent failure. 3, the conventional automatic transmission and engine inspection, the main items are: a. Check the oil level and oil quality. b. Check and adjust the accelerator cable and throttle position sensor. c. Check the gear selector lever with lever system. d. Check the neutral start switch and gear switch. e. Check the engine idling. f. Check the tire pressure and other relevant parts of the transmission system. 4, the stall test, check engine and automatic transmission technology state of the internal machinery. 5, manual-shift test; a fault in the electronic control automatic transmission or in the internal part. 6, the delay test, check the day move the transmission clutch, brake wear. 7, self-diagnostics and electronic control system components and circuit testing. 8, hydraulic test, check pump, regulator, governor oil pressure and oil pressure. 9, the road test, check the automatic shift points, whether abnormal noise, vibration, spin and the engine braking effect and so on. 10, the comprehensive test results, failure analysis and determine the cause and location. Note: 1, automatic transmission failure, engine, electrical control system and automatic transmission, and therefore should be recognized within the fault in the automatic transmission only after the demolition of its maintenance. Automotive repair and maintenance network 2, lifting or support vehicle, if only from the top automotive front or rear, must be plugged with a triangular wooden wheels. 3, dismantling the electrical components, you should remove the negative battery cable. After removing the negative battery cable may result in sound system, anti-theft system locked, and can lead to the disappearance of some system configuration parameters, and therefore must be prepared before a power outage on record. 4, replace fuse, the fuse must have a fairly new current strength, can not be used above or below the current value of the fuse; check electrical components should use the appropriate range digital multimeter, to avoid damage to parts. 5, broken down before the automatic transmission should be thoroughly cleaned of its external, internal parts to prevent dirt contamination. Because even small debris can also lead to automatic transmission hydraulic system failure. 6, automatic transmission disassembly, all parts should be put away in order to facilitate the loading complex. Valve assembly, especially when broken down, the valve spring should be put together. 7, the decomposition of the automatic transmission of the parts a thorough cleaning, the oil channel, hole blown through with compressed air, to ensure that is not blocked. Recommended to use automatic transmission oil or kerosene cleaning parts. After washing with dry way to dry. 8, the assembly before the assembly, carefully check all parts and assembly, find damaged parts should be replaced. If the assembly 9, a one-time non-reusable parts, such as cotter pins, seals and other components. 10, need to be replaced due to wear bushing, the supporting parts must be replaced together. 11, needle roller bearings and seat wear or damage should be replaced. 12, replacement of the clutch, brake friction films, the assembly must be placed before the automatic transmission oil immersion at least 15min. 13, all seals, rotating parts and sliding surfaces should be coated before assembly automatic transmission oil. 14 can be used to grease (butter) to small parts on a stick in the appropriate position for assembly. 15, all needle roller bearings with the seat should have the right location and installation directions. 16, the gasket or similar sealant can not be used on parts. 17, the parts, assembly by the assembly in reverse order of removal; screws should be tightened as specified. 18, all the disassembly process should make full use of special tools. 19, check the hoses and wire terminals, to ensure accurate and reliable connection.