System and method for responding to transmission oil temperature high stuck

Abstract

A method performed by a transmission oil temperature High Stuck response system according to the present invention comprises: capturing the oil temperature at the time of IG off; detecting the driver’s door release; detecting whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release; starting a forced circulation operation of the transmission oil when the temperature range corresponding to the vehicle’s oil temperature High Stuck is detected; and operating a radiator fan to forcibly cool the transmission oil as the forced circulation operation begins.

Description

Technology Field

[0001] The present invention relates to a transmission oil temperature high stuck response system and method. Background Technology

[0002] Figure 1 is a diagram illustrating a method for diagnosing High Stuck faults in an oil temperature sensor in the prior art.

[0003] Automatic Transmission Fluid (ATF) is a specialized lubricant used in automatic transmissions. Due to its viscosity-decreasing characteristic at high temperatures, it performs line pressure control and maintains a high initial line pressure during gear shifting to achieve the required line pressure level. However, if the fluid fails to accurately represent the current fluid temperature during the Driving Cycle (DC) and outputs a high temperature instead, the control being mismatched with the fluid temperature characteristics adversely affects shifting feel—that is, drivability (e.g., shifting shock). This condition, where the fluid temperature value remains stuck at a high temperature without any electrical fault, is referred to as a "High Stuck" failure of the fluid temperature sensor.

[0004] If a temperature change (temperature drop) in the cooling water temperature is confirmed under sufficient soaking conditions, the oil temperature value must also show the same temperature drop. In conventional technology, this is used to check the oil and cooling water temperatures at IG off and at the new DC; if there is no change in the oil temperature value despite the confirmation of a change in the cooling water temperature, it is considered High Stuck.

[0005] After diagnosing such a fault, the transmission fluid temperature is fixed at 80 degrees, which is the representative value of the driving range, to minimize the impact on driving performance in the driving range.

[0006] Figure 2 is a drawing to explain the problems in the prior art.

[0007] As vehicle systems become increasingly complex, there are cases in certain vehicles where the temperature of ATF (Automatic Transmission Fluid) decreases slowly even after it has been soaked for a long time. In such situations, if the ATF temperature remains high despite the diagnostic logic having sufficiently lowered the coolant temperature, there is a possibility of misdiagnosis.

[0008] And after diagnosis, the oil temperature is fixed at 80 degrees, which is the most commonly used temperature for safety reasons, to minimize the impact on the shifting feel while driving. However, if this high temperature is actually the normal oil temperature, fixing the oil temperature in this way is unnecessary from a safety standpoint and may affect the driver's driving ability.

[0009] To find appropriate solutions to these problems, accurate diagnostic methods are required, and the application of new technologies is necessary to avoid unnecessary measures resulting from misdiagnosis. Prior art literature

[0010] Published Patent Application No. 10-2004-0034268 (April 28, 2004) The problem to be solved

[0011] The problem that the present invention aims to solve is to improve the possibility of misdiagnosis of the existing oil temperature sensor High Stuck logic by lowering the oil temperature and to provide a more accurate response measure in terms of safety. In particular, the invention relates to a transmission oil temperature High Stuck response system and method that effectively utilizes a radiator fan and an ATF warmer to perform fault diagnosis more accurately and minimize unnecessary responses caused by misdiagnosis so as not to affect drivability.

[0012] However, the problems that the present invention aims to solve are not limited to those described above, and other problems may exist. means of solving the problem

[0013] A method for responding to a transmission oil temperature High Stuck according to a first aspect of the present invention for solving the above-described problem comprises: a step of capturing the oil temperature at the time of IG off; a step of detecting the driver's door release; a step of detecting whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release; a step of initiating a forced circulation operation of the transmission oil when the temperature range corresponding to the vehicle's oil temperature High Stuck is detected; and a step of operating a radiator fan to forcibly cool the transmission oil as the forced circulation operation begins.

[0014] In some embodiments of the present invention, the step of detecting whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of door release comprises: a step of supplying power to a transmission control unit at the time of detection of door release to switch to a wake-up mode; a step of comparing the captured oil temperature with a preset first threshold value; and a step of operating the transmission control unit in a sleep mode if, as a result of the comparison, the captured oil temperature does not exceed the preset first threshold value.

[0015] In some embodiments of the present invention, the step of detecting whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of door release comprises: supplying power to a transmission control unit at the time of detection of door release to switch to a wake-up mode; comparing the captured oil temperature with a preset first threshold value; capturing the oil temperature in the wake-up mode state if the comparison result exceeds the preset first threshold value; determining whether the difference between the IG off time and the oil temperature in the wake-up mode state satisfies less than a preset second threshold value; and operating the transmission control unit in a sleep mode if it satisfies greater than or equal to the second threshold value.

[0016] Some embodiments of the present invention may further include the steps of: forcing the EOP and radiator fan to operate when the second threshold is less than; checking whether the difference between the captured oil temperature in the wake-up mode state and the currently captured oil temperature is less than a preset third threshold; and switching the EOP and radiator fan to a normal mode when the third threshold is not satisfied.

[0017] Some embodiments of the present invention may further include the steps of: checking whether the vehicle ignition has been switched to the ON state when the third threshold value is satisfied; forcing the transmission control device to maintain the P position in the ON state; and providing a cluster notification that the oil temperature sensor is being checked.

[0018] In some embodiments of the present invention, when a temperature range corresponding to the oil temperature High Stuck of the vehicle is detected, the step of starting a forced circulation operation of the transmission oil may be performed by opening the oil passage through an ATF warmer when the difference between the currently captured oil temperature and the coolant temperature in the vehicle ignition-on state exceeds a preset fourth threshold value, thereby executing a heat exchange operation.

[0019] In some embodiments of the present invention, when a temperature range corresponding to the oil temperature High Stuck of the vehicle is detected, the step of starting a forced circulation operation of the transmission oil may stop the heat exchange operation by closing the oil passage through an ATF warmer when the preset fourth threshold is not exceeded.

[0020] Some embodiments of the present invention may further include the step of supplying power to a transmission control unit at the time of detection of the door release to determine whether the difference between the oil temperature captured in the wake-up mode and the currently captured oil temperature satisfies a preset fifth threshold value or less; the step of switching the SUP, EOP, radiator fan, and the oil path to a normal mode if the difference does not satisfy the fifth threshold value or less; and the step of providing a cluster notification that the oil temperature sensor check is complete.

[0021] Some embodiments of the present invention may further include the steps of: supplying power to a transmission control unit at the time of detection of door release to determine whether the difference between the oil temperature captured in the wake-up mode and the currently captured oil temperature satisfies a preset fifth threshold value or less; if the difference satisfies the fifth threshold value or less, if a preset diagnostic count is counted at a preset value or greater, switching the SUP, EOP, radiator fan, and the oil path to a normal mode; fixing the value of the oil temperature to a preset value; and providing a cluster notification indicating an oil temperature sensor malfunction due to the oil temperature High Stuck.

[0022] In addition, a transmission oil temperature High Stuck response system according to the second aspect of the present invention comprises a transmission control unit, wherein the transmission control unit is equipped with a control circuit for communicating with and controlling a radiator fan and an ATF warmer, wherein the transmission control unit captures the oil temperature at the time of IG off, detects the driver's door release, detects whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release, and if the temperature range corresponding to the vehicle's oil temperature High Stuck is detected, starts a forced circulation operation of the transmission oil, and as the forced circulation operation starts, operates the radiator fan to forcibly cool the transmission oil.

[0023] A computer program according to another aspect of the present invention for solving the above-mentioned problem is combined with a computer, which is hardware, to execute the transmission oil temperature High Stuck response system and method, and is stored in a computer-readable recording medium.

[0024] Other specific details of the present invention are included in the detailed description and drawings. Effects of the invention

[0025] According to one embodiment of the present invention described above, by utilizing a radiator fan and an ATF Warmer, the possibility of misdiagnosis occurring in a specific area can be eliminated, thereby preventing misdiagnosis in virtual situations rather than actual failures and providing the advantage of obtaining accurate oil temperature information.

[0026] In addition, by preventing misdiagnosis caused by the application of fixed oil temperature values, and by avoiding unnecessary oil temperature substitution values ​​or reduced drivability in artificial situations, adverse effects on driver drivability can be avoided and vehicle stability can be maintained.

[0027] Furthermore, it can help protect transmission hardware by accurately determining the actual status of a malfunction. In addition, accurate fault diagnosis can improve the efficiency of service centers and quality response operations, and it offers the advantage of preventing revenue loss caused by unnecessary product replacements through the prevention of misdiagnosis and oil temperature control.

[0028] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below. Brief explanation of the drawing

[0029] The drawings attached below are intended to aid in understanding the embodiments thereof and provide embodiments together with a detailed description. However, the technical features of the embodiments thereof are not limited to specific drawings, and the features disclosed in each drawing may be combined with one another to form new embodiments. Figure 1 is a diagram illustrating a method for diagnosing High Stuck faults in an oil temperature sensor in the prior art. Figure 2 is a drawing to explain the problems in the prior art. FIGS. 3a and 3b are flowcharts of a method for responding to high stuck transmission oil temperature according to an embodiment of the present invention. FIG. 4 is a block diagram of a transmission oil temperature High Stuck response system according to one embodiment of the present invention. Specific details for implementing the invention

[0030] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims.

[0031] The terms used in this specification are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and / or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical scope of the invention.

[0032] Unless otherwise defined, all terms used herein (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0033] The present invention relates to a transmission oil temperature High Stuck response system (100) and a method.

[0034] As mentioned above, the diagnostic method based on the oil temperature (IG On) captured in the conventional DC determines whether a fault exists immediately; therefore, if a fault actually occurs, it can be quickly detected before driving and the adverse effect on the shifting feel can be minimized through countermeasures such as fixing it at 80 degrees. However, if this is a misdiagnosis, even the same response may be perceived as an unnecessary adverse effect on the shifting feel.

[0035] Furthermore, while resolving misdiagnosis requires monitoring temperature rise during driving, this presents the problem of necessitating specific temperature conditions and operation under high load. Consequently, this requires a significant amount of driving time, and there is a difficulty in avoiding the adverse impact on drivability experienced by the driver during that period.

[0036] To resolve these issues, one embodiment of the present invention aims to eliminate the possibility of misdiagnosis in specific areas that may occur during the conventional High Stuck diagnosis of the transmission oil temperature sensor by effectively utilizing a radiator fan and an ATF warmer to create a temperature reduction effect. Through this, one embodiment of the present invention can minimize adverse effects on drivability caused by misdiagnosis in oil temperature substitute values ​​or hypothetical situations, while simultaneously protecting the driver and transmission hardware.

[0037] This prevents a decline in sales caused by unnecessary product exchanges and minimizes the loss of personnel and resources associated with service centers and quality responses. Furthermore, improved transmission safety ensures driver safety while enhancing product reliability.

[0038] Hereinafter, with reference to FIGS. 3a and FIGS. 3b, a method performed by a transmission oil temperature High Stuck response system (100) according to one embodiment of the present invention will be described.

[0039] FIGS. 3a and 3b are flowcharts of a method for responding to high stuck transmission oil temperature according to an embodiment of the present invention.

[0040] First, one embodiment of the present invention captures the oil temperature at the time of IG Off (IG Off, S102) in a state where there is no oil temperature sensor, CAN communication, and engine coolant error (S101).

[0041] Next, the driver's door lock is detected to be unlocked (S103), and if door unlocking is detected, power is supplied to the transmission control unit at the time of detection of door unlocking to switch the transmission control unit to wake-up mode (S104).

[0042] Next, the captured oil temperature (IG Off) is compared with a preset first threshold value (S105), and if the comparison result shows that the captured oil temperature (IG Off) does not exceed the preset first threshold value (S105-N), the transmission control unit is operated in sleep mode (S106).

[0043] In contrast, if the oil temperature captured as a result of comparison (IG Off) exceeds a preset first threshold (S105-Y), the oil temperature in the wake-up mode state is captured (Pre Wake Up, S107). Then, it is determined whether the difference between the oil temperature at the time of IG Off (IG Off) and the oil temperature in the wake-up mode state (Pre Wake Up) satisfies a value less than a preset second threshold (S108), and if the determination result satisfies a value greater than or equal to the second threshold (S108-N), the transmission control unit is operated in sleep mode (S106).

[0044] In contrast, if the judgment result is below the second threshold (S108-Y), the battery voltage is checked and, in the case of a hybrid vehicle, the SOC is checked and if there is no problem (S109), the EOP mill radiator fan is forcibly driven (S110).

[0045] As such, one embodiment of the present invention detects whether the oil temperature is High Stuck at the time of door release detection before the driver starts the vehicle, thereby allowing the driver to diagnose the oil temperature High Stuck more quickly and avoid adverse effects on driving delay or gear shifting feel.

[0046] Next, it is checked whether the difference between the oil temperature captured in the wake-up mode (Pre Wake Up) and the oil temperature captured in the current state (Current) is less than a preset third threshold value (S111). If it does not satisfy being less than the third threshold value (S111-N), i.e., if it is outside the range of High Stuck, the EOP and radiator fan are switched to normal mode (S112). Then, the transmission control unit is operated in sleep mode (S106).

[0047] In contrast, if the condition is below the third threshold (S111-Y), vehicle starting is allowed to check whether the ignition has been switched to the ON state (S113). After starting the vehicle, forced cooling is attempted for a certain period of time; at this time, the driver's driving request (position information driving stage) is rejected to preemptively prevent the driver from feeling a sense of unfamiliarity in driving before diagnosis.

[0048] To this end, one embodiment of the present invention forcibly maintains the transmission control device in the P position while the engine is on, with the diagnostic count initialized (S114) (S115). This is forcibly maintained until the diagnosis is completed, even if the driver requests to drive. Additionally, a cluster notification is provided to allow the driver to confirm that the oil temperature sensor is being checked (S116).

[0049] Next, with the vehicle ignition on, the difference between the currently captured oil temperature (Current) and the coolant temperature is calculated (S117). If the calculated difference exceeds a preset fourth threshold value (S117-Y), that is, if the coolant temperature is significantly lower than the oil temperature (Current), the passage is opened through the ATF warmer to perform a heat exchange operation (S118). This opening of the passage acts as a cooler, which can increase the cooling effect through heat exchange. Conversely, if the difference does not exceed the preset fourth threshold value (S117-N), the passage is closed through the ATF warmer to stop the heat exchange operation (S119).

[0050] Next, it is determined whether the difference between the oil temperature captured in the wake-up mode (Pre Wake Up) and the oil temperature captured in the current mode (Current) satisfies a preset fifth threshold (S120). If it does not satisfy a value below the fifth threshold (S120-N), it is determined to be normal, the forced drive system is released, and the SUP, EOP, radiator fan, and oil flow are switched to normal mode (S121). Then, a cluster notification is provided stating that the oil temperature sensor check is complete (check is normal and normal driving is possible) (S122).

[0051] In contrast, if the pre-set fifth threshold is satisfied (S120-Y), check whether the pre-set diagnostic count has been counted greater than or equal to the pre-set value (S123), and if it is less than the set value (Y123-Y), increase the diagnostic count by 1 (S124) and then repeat the steps below S115.

[0052] However, if the diagnostic count exceeds the set value (Y123-N), that is, if the diagnosis is not performed even after cooling within the set time, the SUP, EOP, radiator fan, and oil flow are switched to normal mode (S125), and the oil temperature is fixed to a preset value (S126). This can be fixed at 80 degrees, which is the representative oil temperature value of the vehicle. Additionally, an oil temperature High Stuck notification is provided via the cluster to indicate an oil temperature sensor malfunction, thereby signaling that the vehicle needs to be brought to a repair shop (S127).

[0053] Meanwhile, in the above description, steps S101 to S127 may be further divided into additional steps or combined into fewer steps according to an embodiment of the present invention. Also, some steps may be omitted as necessary, and the order between steps may be changed. Furthermore, even if other omitted details are included, the content of FIG. 3 may also be applied to the content of FIG. 4 described later.

[0054] FIG. 4 is a block diagram of a transmission oil temperature High Stuck response system (100) according to one embodiment of the present invention.

[0055] A transmission oil temperature High Stuck response system (100) according to one embodiment of the present invention includes a transmission control unit (110). At this time, the transmission control unit (110) is equipped with a control circuit for communicating with and controlling a radiator fan and an ATF warmer.

[0056] According to an embodiment, the transmission control unit (110) captures the oil temperature at the time of IG off, detects the driver's door release, and detects whether the captured oil temperature at the time of detection of door release corresponds to a temperature range corresponding to High Stuck.

[0057] Additionally, when the transmission control unit (110) detects a temperature range corresponding to the vehicle's oil temperature High Stuck, it starts a forced circulation operation of the transmission oil, and as the forced circulation operation starts, it operates a radiator fan to forcibly cool the transmission oil.

[0058] The transmission oil temperature High Stuck response method according to one embodiment of the present invention described above may be implemented as a program (or application) and stored on a medium to be executed in combination with a computer, which is hardware.

[0059] The aforementioned program may include code encoded in computer languages ​​such as C, C++, JAVA, Ruby, and machine language, which can be read by the computer's processor (CPU) through the computer's device interface, in order for the computer to read the program and execute the methods implemented in the program. Such code may include functional code related to functions that define the necessary functions for executing the methods, and may include control code related to execution procedures necessary for the computer's processor to execute the functions according to a predetermined procedure. Additionally, such code may further include memory reference code regarding where (address) additional information or media necessary for the computer's processor to execute the functions should be referenced in the computer's internal or external memory. In addition, if the processor of the computer needs to communicate with any other computer or server located remotely in order to execute the above functions, the code may further include communication-related code regarding how to communicate with any other computer or server located remotely using the communication module of the computer, and what information or media to transmit or receive during communication.

[0060] The above-mentioned storage medium refers to a medium that stores data semi-permanently and is readable by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specifically, examples of the above-mentioned storage medium include, but are not limited to, ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. That is, the above-mentioned program may be stored on various recording media on various servers that the computer can access, or on various recording media on the user's computer. Additionally, the above-mentioned medium may be distributed across networked computer systems, and computer-readable code may be stored in a distributed manner.

[0061] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0062] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0063] 100: Transmission oil temperature High stuck response system 110: Transmission control unit

Claims

Claim 1 A method performed by a transmission fluid temperature High Stuck response system that controls line pressure control and shifting according to the viscosity characteristics of ATF (Automatic Transmission Fluid) used in an automatic transmission, comprising: a step of capturing the fluid temperature at the time of IG off; a step of detecting the driver's door release; a step of detecting whether the captured fluid temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release; a step of initiating a forced circulation operation of the transmission fluid when the temperature range corresponding to High Stuck of the vehicle fluid temperature is detected; and a step of operating a radiator fan to forcibly cool the transmission fluid as the forced circulation operation is initiated, wherein the step of detecting whether the captured fluid temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release comprises: a step of supplying power to a transmission control unit at the time of detection of the door release to switch to a wake-up mode; a step of comparing the captured fluid temperature with a preset first threshold value; and a step of operating the transmission control unit in a sleep mode if, as a result of the comparison, the captured fluid temperature does not exceed the preset first threshold value. A step of supplying power to a transmission control unit to switch to a wake-up mode at the detection point of the door release; a step of comparing the captured oil temperature with a preset first threshold value; a step of capturing the oil temperature in the wake-up mode state if the comparison result exceeds the preset first threshold value; a step of determining whether the difference between the IG off point and the oil temperature in the wake-up mode state satisfies being less than a preset second threshold value; and a step of operating the transmission control unit in a sleep mode if it satisfies being greater than or equal to the second threshold value; and a step of forcibly driving the EOP and radiator fan if it is less than the second threshold value.A method for responding to a transmission oil temperature high stuck, comprising: a step of checking whether the difference between the oil temperature captured in the wake-up mode state and the currently captured oil temperature is less than a preset third threshold value; and a step of switching the EOP and radiator fan to a normal mode if the difference is not less than the third threshold value; and, if the difference is less than the third threshold value, a step of checking whether the vehicle ignition has been switched to the ON state; a step of forcibly maintaining the transmission control device in the P position in the ON state; and a step of providing a cluster notification that the oil temperature sensor is being checked. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 A method for responding to a transmission oil temperature High Stuck according to claim 1, wherein when a temperature range corresponding to the oil temperature High Stuck of the vehicle is detected, the step of starting a forced circulation operation of the transmission oil is to open the oil passage through an ATF warmer and perform a heat exchange operation when the difference between the currently captured oil temperature and the coolant temperature in the vehicle ignition ON state exceeds a preset fourth threshold value. Claim 7 In claim 6, the step of initiating a forced circulation operation of the transmission oil when a temperature range corresponding to the oil temperature High Stuck of the vehicle is detected is to stop the heat exchange operation by closing the oil passage through an ATF warmer when the preset fourth threshold is not exceeded. Claim 8 A method for responding to a transmission oil temperature High stuck, comprising: a step of determining whether the difference between the oil temperature captured in the wake-up mode and the currently captured oil temperature satisfies a preset fifth threshold value by supplying power to the transmission control unit at the time of detection of the door release; a step of switching the SUP, EOP, radiator fan, and the oil passage to a normal mode if the difference does not satisfy the fifth threshold value; and a step of providing a cluster notification that the oil temperature sensor check is completed. Claim 9 A method for responding to a transmission oil temperature High Stuck according to claim 6, further comprising: a step of determining whether the difference between the oil temperature captured in the wake-up mode and the currently captured oil temperature satisfies a preset fifth threshold value by supplying power to the transmission control unit at the time of detection of the door release; a step of switching the SUP, EOP, radiator fan, and the oil passage to a normal mode if the difference satisfies the fifth threshold value or if the preset diagnostic count is counted above a preset value; a step of fixing the value of the oil temperature to a preset value; and a step of providing a cluster notification that there is an oil temperature sensor malfunction due to the oil temperature High Stuck. Claim 10 In a transmission oil temperature High Stuck response system, the system includes a transmission control unit, and the transmission control unit is equipped with a control circuit for communicating with and controlling a radiator fan and an ATF warmer. The transmission control unit captures the oil temperature at the time of IG off, detects the driver's door release, and detects whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release. When the temperature range corresponding to the vehicle's oil temperature High Stuck is detected, the transmission control unit starts a forced circulation operation of the transmission oil, and as the forced circulation operation begins, operates the radiator fan to forcibly cool the transmission oil. The transmission control unit, when detecting whether the captured oil temperature corresponds to a temperature range corresponding to High Stuck at the time of detection of the door release, supplies power to the transmission control unit at the time of detection of the door release to switch to a wake-up mode, compares the captured oil temperature with a preset first threshold value, and if the result of the comparison is that the captured oil temperature does not exceed the preset first threshold value, the transmission control unit Operate in sleep mode, supply power to the transmission control unit at the detection point of the door release to switch to wake-up mode, compare the captured oil temperature with a preset first threshold value, and if the comparison result exceeds the preset first threshold value, capture the oil temperature in the wake-up mode state, determine whether the difference between the IG off point and the oil temperature in the wake-up mode state satisfies less than a preset second threshold value, if it satisfies greater than or equal to the second threshold value, operate the transmission control unit in sleep mode, and if it is less than the second threshold value, forcibly drive the EOP and radiator fan, and check whether the difference between the oil temperature captured in the wake-up mode state and the currently captured oil temperature is less than a preset third threshold value.A transmission oil temperature High Stuck response system characterized by switching the EOP and radiator fan to normal mode when the above third threshold is not satisfied, and when the above third threshold is satisfied, checking whether the vehicle ignition is switched to the ON state, forcibly maintaining the transmission control device in the P position while the ignition is ON, and providing a cluster notification that the oil temperature sensor is being checked.

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