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Troubleshooting - General Information

AT failures can occur for five main reasons, which include poor engine performance, violation of regulations, failure of hydraulic, mechanical causes or failure of the control system (CPU). Diagnosis of the problems associated with AT should start by checking the most easily fixed by reasons such as: the level and condition of transmission fluid (Head of Adjustment and routine maintenance), adjustment of draft of a gear change and adjustment of thrust change the throttle position. Further, sea trials should be conducted to verify the elimination of problems with the previous patch. If the problem is still not possible, further, more complete, AT diagnosis should be left to professionals. See. See also Section Troubleshooting at the beginning of this manual.

Initial inspection

PERFORMANCE ORDER

During the trip, the transmission warm to normal operating temperature. Check the transmission fluid level (Head of Adjustment and routine maintenance): If the fluid level is unusually low, add the necessary amount of it (the measuring probe), then check the transmission for signs of external leaks. If the fluid level, on the contrary, too high, check the fusion surplus for signs of contamination cooler. Presence of transmission fluid in the engine coolant is a sign of damage to the inner walls of the radiator separating tanks filled with transmission fluid from the main cavity radiator (Head of System of cooling, heating and air conditioning). If there is a foaming liquid, pour it out and replace it, then check drained of getting into her cooler. Check the fill level of the transmission. Check engine idle speed. If there are cracks in the engine should not start performance of primary checks to eliminate their causes. Check out the free stroke actuator rod reposition the throttle kickdown mode. If necessary, make adjustments (see Section Description, replacement and adjustment of the throttle cable mode kickdown (TV-cable)). Link damper drive mode kick-down can function normally switched off and the engine is cold, but the refusal to give after his warm-up. Check the operation of the thrust as in the cold, and when heated to normal operating temperature of the engine. Check the operation of shift rod (Section Check and adjustment of a cable switch). Make sure of correctness of adjustment and ride traction.

Check the transmission fluid leaks

Most transmission fluid leak can be detected by visual means. Repair usually consists in replacing the gland or gasket. If you discover the source of the leak is not possible, can help the implementation of the proposed procedure below.

PERFORMANCE ORDER

Identify the fluid. Make sure that it found traces of the transmission fluid, not motor oil or brake fluid (liquid AT has a dark red color). Try to identify the source of the leak. Take a short trip by car (up to several kilometers), and then park it by stopping the spread on the ground over a sheet of cardboard. A few minutes later the source of the leak can be installed on the incident on board drops. Carefully inspect the suspect component and the surface directly around him. Pay special attention to mating through the pad surfaces. Most useful for visual inspection is the use of a small mirror. If the source of the leak still can not identify the suspect, thoroughly clean the surface with a degreaser or solvent, and then dry it. Again, take a short drive to warm the transmission to normal working temperature, banishing during its transmission through the positions of all gear. After stopping again make a visual inspection of the suspect component. Once the source of the leak is installed, you need to find and eliminate the cause of its occurrence. If you replace the pad, leaving the flange deformed, leaks in the near future will arise again. Bent flanges must always be aligned. Before you begin to eliminate the cause of the leak, make sure in carrying out the following conditions, as non-compliance can lead to an early resumption of leaks. Some of the following: the conditions can not be met without the use of special tools and a thorough examination of the deep. Solving such problems should be left to professionals or workshop of dealer branch of service centers.

Leaks through faulty gasket

Regularly external examination of the sump of the transmission. Check the availability and reliability of a tightening of bolts, gaskets, and the absence of the state of deformation of the pallet (the presence of dents on the pallet may be a sign of damage to the hull located inside the valve).

The cause of the leakage of fluid through the oil pan gasket may be an excessive increase in the level and / or pressure of the transmission fluid. It may be clogged vent pipe can be overtightened bolts of the pallet, there is a possibility of deformation or damage to the tray flange mating surface him transmission housing. The leak may be a consequence of the damage to the gasket or cracks or cavities in the crankcase casting. If the gasket was formed from the sealant, it was used quite possibly not the sort of sealant.

Leaks through seals

The cause of the leakage through the gland may also be excessive level or liquid pressure or blockage of ventilation. It is possible damage to the surface of the contact socket of the gland, or passing through the shaft seal may be damaged or improperly installed and the gland itself. Weakening of the bearing can cause excessive shaft battlefield, which also leads to leaks through the packing.

Make sure the gasket of the tube of the probe is in a satisfactory condition, and the tube itself is properly seated in housing. Regularly check the surface in the area of the drive gear and the speedometer sensor for signs of leaks. In the presence of traces of the transmission fluid, check the condition of the sealing ring.

Leaks through the crankcase

If there are signs of leakage through the proper transmission housing, it is possible to cast it appeared cavities or cracks. Carter must be repaired or replaced.

Make sure that the couplings cooling hoses are in good condition and properly tightened.

The liquid flows through the vent pipe or tube filler

If this happens, the mission is full and we can talk about contact with the liquid coolant, the presence of cavities in the molding cutters, incorrect landing probe, clogging the vent pipe or return drains.