Fault diagnosis of automatic transmissions and transmissions

To facilitate fault automobile boxes - automata and their resolve, there are methods that are described below. But at the same time, to the ultimate success requires a fairly precise information collected and the correct analysis. This publication will describe in detail about the way that the fault diagnosis of automatic transmissions and transmissions. Causes failure of automatic transmission may be several, as each of them separately, and various combinations thereof: failure of the transformer malfunction of electronic control unit failure of the hydraulic control system violation adjustments maladjustment or zakisanie control cable wear friction controls malfunction of the mechanical part of the system management Diagnostics Troubleshooting Automatic transmission is desirable to subject in the following order: Check the condition and the oil level Check engine idling, the joints, electrical cable select band, check out the vacuum. And in the AKP, which has a hydraulic control system, you should check the shift control valve, throttle. Determine the fault code gearbox control unit engine. Check the car in a completely inhibited state. Check the pressure in the control system. Conduct road tests, ie when driving a car. Check control cable through the valve-throttle. In the management of PTC plays an important role shift control valve, throttle. This cable is used to connect the injection pump control lever or sector throttle control mechanism ACTs. The cable is a metal base, enclosed in a plastic shell, which both sides have a rigid fixation. This shell is a long operation dries, becomes shorter, and leaves the attachment points. If the transfer switch to low or high speeds, the cause may be the control cable. With Control Cable-throttle valve can get rid of some faults ACTs. Adjusting the ropes. Before you adjust the cable, you need to check the ease of his progress. If necessary, it can be greased. Then loosen the adjustment nuts. When fully depressed throttle pedal to adjust the cable so that the focus was for rope span of less than 1.5 mm. Emphasis on new cables available. In this case, you must pull the cord located inside such a way as to present some resistance, and in this situation you need to install the emphasis away from the cover of 0,8-1,5 mm cable. Then Tighten the nuts, and release the pedal. Check the control unit and the engine itself. Gearbox and engine work together, their activities must be coordinated. Therefore, the main step is to verify the diagnosis of PTC of the engine. Its failure leads to submission of incorrect signals that are used by the transmission control system. The system itself is unable to verify the correctness of the information received. This leads to a combination of sharp and late switching, or switching to promiscuity. Also, the electronic control system can adapt to the malfunction of the engine, which further causes confusion in the control box - an automaton. Checking for a fully locked car. The purpose of testing is to determine the correctness of the converter and motor as well as the definition of quality brake friction controls. Checks are recommended in the presence of a service specialist. Also, be careful, because when testing transmission undergoes congestion and transmission oil temperature rises significantly. Test procedure. First need to check the oil level in transmission and engine. With its lack of oil topped up. This is followed by warm up to operating temperature in the transmission and engine. Working oil temperature is reached within 20 minutes of the engine in an urban environment or in high-speed traffic. The car must stand firmly on the wheels, and to be inhibited so as to prevent its movement. To do this, enclose stops the wheels, put in the position «P» lever range, and include parking and the main brake. To avoid accidents is unacceptable to find the people behind and in front of the car. Stages review: Set to «D» lever range. All the way to squeeze the throttle pedal. Determine the maximum engine speed. Translate into position «N» lever range. Within 30 seconds, leave the engine running at idle, as it is needed for cooling.