KR100412788B1 - Method for checking memory faults of automatic transmission control unit - Google Patents

Abstract

PURPOSE: A method for checking memory faults of an automatic transmission control unit is provided to secure reliability of the automatic transmission control unit by checking fault conditions per a loop, updating a code, ascertaining the check sum, and detecting faults of memory contents. CONSTITUTION: A method for checking memory faults of an automatic transmission control unit comprises a first step of comparing the current fault condition with a fault condition stored in a memory; a second step of resetting an initialization counter if the current fault condition is equal to the fault condition stored in the memory, and comparing the initialization counter with a predetermined counter and determining the passing state of time if the fault conditions are different; a third step of resetting fault contents and the counter if an initialization counter value is greater than a reset counter value; a fourth step of renewing a check sum value; and a fifth step of storing fault contents and the contents of a fault code and the check sum in a memory if the contents of the memory are not changed, and clearing all of the fault contents and the fault code and the check sum value if the contents of the memory are changed.

Description

How to check memory error of automatic transmission controller.

The present invention relates to a memory abnormality check method of an automatic transmission controller to check a fault condition every loop to determine whether there is an abnormality in a memory and to display an accurate situation of a vehicle.

In the automatic transmission controller (TCU), the control program and various data are stored in the memory of the microcomputer.

As such, since a control program and various data are stored in the memory, when an error occurs in the memory, accurate and reliable control cannot be achieved.

Therefore, in the present invention, the code is updated by updating the code by checking the pulse status every loop, and checking the check sum to detect the abnormality of the memory contents. Therefore, it is to ensure the reliability of the automatic transmission controller.

1 is a flow chart showing the execution process of the method of checking the memory abnormality of the automatic transmission controller of the present invention.

Hereinafter, an embodiment of the present invention for achieving the above object will be described in detail with reference to FIG. 1.

After the ignition key is turned on, if the first process of comparing the current state of the pult state and the previously stored pulp state and the result of the comparison is the same as the current state of the pulp state and the previously stored pulp state, the counter is initialized. A second process of determining whether the time has elapsed compared to the preset reset counter if the pulp situation is different, and a third process of resetting the pulp contents and the counter when the determination result is greater than the reset counter value. And the fourth step of updating the value of the checksum, and the fifth step of storing the contents of the pulp, the code and the checksum in the memory if the contents of the memory have not changed, and clearing all of them if they have changed. It is characterized by.

As an execution process as described above, an embodiment of the present invention will be described as follows.

First, the status of the current pulp and the current status of the pulp stored in the memory are compared with each other after the ignition on to determine whether there is a change.

At this time, if the current pulp status is the same as the one stored in the memory, the initialization counter is reset. Otherwise, the initialization counter is compared with the preset counter.

As described above, it is determined whether the time has elapsed by comparing the initialization counter with the preset counter, and when the value of the initialization counter becomes larger than the reset counter value, the pulp contents and the counter are reset.

In both cases, the contents of the checksum are then updated.

If the contents in the memory have not changed after updating the contents of the check sum as described above, the pulp contents, the pulp code, and the check sum value are stored in the memory.

However, when the contents of the memory change, both the pulp contents, the pulp code, and the checksum value are cleared.

As such an execution process, it is possible to detect the abnormality of the memory.

As described above, by performing the above process every time the loop proceeds, it is possible to provide a reliable flux shift controller, and to provide a reliable flux shift controller. There is an effect that can improve the operability.

Claims (1)

If the first process of comparing the current state of the pulptic state with the one stored in the memory is the same as the result of the comparison, the initial counter is reset. If the pulp situation is different, the second process of determining whether the time has elapsed compared to the preset reset counter; the third process of resetting the pulp contents and the counter when the determination result is greater than the reset counter value; And a fifth process of storing the contents of the pulp, the code and the checksum in the memory if the contents of the memory have not changed, and clearing all of the contents if the contents are changed. How to check whether there is memory error.