A vehicle air conditioner controller test system

Abstract

The utility model relates to vehicle air conditioner test technical field especially, a kind of vehicle air conditioner controller test system, system includes MCU control module, power module, indication module, relay signal detection indication module, actuator signal detection indication module, acquisition module, sensor state simulation module, and for connecting measured product, connector of actuator and sensor;The power module is connected with each module of system, for system power supply and the power supply of external output;The MCU control module is connected with each module of system, for data processing and instruction control;The connector is connected with the MCU control module, the sensor state simulation module, the relay signal detection indication module and the actuator signal detection indication module, carry out data interaction with each module of system and measured product, actuator and sensor. For solving the technical problem that air conditioner controller test is not accurate.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air conditioning testing technology, and in particular to a vehicle air conditioning controller testing system. Background Technology

[0002] As the core control unit of an automotive air conditioning system, the vehicle air conditioning controller is responsible for receiving sensor signals, parsing user operation commands, and driving components such as mode actuators, heating / cooling actuators, blowers, and relays to work together. Its performance stability and functional integrity directly affect the user experience, energy consumption control, and driving comfort of the automotive air conditioning system. Therefore, in the research and development, production, and after-sales maintenance of vehicle air conditioning controllers, it is necessary to use professional testing equipment to comprehensively test its core indicators such as power supply compatibility, signal interaction accuracy, actuator drive reliability, and fault response timeliness in order to eliminate product defects and ensure factory quality.

[0003] Existing vehicle air conditioning controller testing equipment has the following main shortcomings: incomplete functional coverage, making it difficult to meet the full-link testing needs such as sensor signal simulation, actuator control detection, and serial port data interaction; poor adaptability, with most interfaces having fixed designs, requiring customized tooling for different products; low degree of automation, relying on manual operation which is prone to errors; insufficient accuracy in fault location, only providing general anomaly prompts, resulting in low troubleshooting efficiency; and low modularity, making maintenance and upgrades inconvenient.

[0004] Therefore, there is an urgent need for a vehicle air conditioning controller testing system that is comprehensive in function, highly adaptable, efficient in testing, accurate in fault location, and easy to maintain. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vehicle air conditioning controller testing system.

[0006] This utility model is achieved through the following technical solution: a vehicle air conditioning controller testing system, comprising an MCU control module, a power supply module, an indicator module, a relay signal detection and indicator module, an actuator signal detection and indicator module, a data acquisition module, a sensor status simulation module, and connectors for connecting the product under test, actuators, and sensors; the power supply module is connected to each module of the system and is used for power supply to the system and for external output; the MCU control module is connected to each module of the system and is used for data processing and command control; the connectors are connected to the MCU control module, the sensor status simulation module, the relay signal detection and indicator module, and the actuator signal detection and indicator module, enabling data interaction between each module of the system and the product under test, actuators, and sensors.

[0007] Furthermore, the power module supports a wide voltage input of DC8-16V and outputs IGN ignition power, battery power, actuator 5V power, and backlight power.

[0008] Furthermore, the connector includes a J1 MCU debugging interface, a P1 power supply interface, a P2 fan board interface, and a J2 external interface; the J1 MCU debugging interface includes a J1-1 DC3.3V power supply pin, a J1-2 GND ground pin, a J1-3 SW-CLK test clock pin, and a J1-4 SW-DIO test data pin; the P1 power supply interface includes a P1-1 positive power supply pin and a P1-2 negative power supply pin; the P2 fan board interface includes a P2-1 IGN power supply pin, a P2-2 blower power supply pin, a P2-3 blower feedback signal pin, a P2-4 blower speed control line pin, and a P2-5 IGN power ground pin; the J2 external interface integrates actuator connection pins, sensor connection pins, serial communication pins, external power supply pins, actuator power supply pins, backlight test pins, and relay control signal detection pins.

[0009] Furthermore, the actuator connection pins of the J2 external interface include mode actuator connection pins, fresh air actuator connection pins, and heating / cooling actuator connection pins; the mode actuator connection pins include J2-1 mode actuator + PIN, J2-21 mode actuator - PIN, J2-32 mode actuator limit signal PIN, and J2-8 mode actuator feedback signal pin; the fresh air actuator connection pins include J2-2 fresh air actuator 2 PIN, J2-22 fresh air actuator 1 PIN, and J2-23 fresh air power PIN; the heating / cooling actuator connection pins include J2-3 heating / cooling actuator - PIN, J2-4 heating / cooling actuator + PIN, J2-33 heating / cooling actuator limit signal PIN, and J2-9 hybrid actuator feedback signal PIN.

[0010] Furthermore, the sensor connection pins of the external interface of J2 include J2-10 light sensor pin, J2-11 water temperature sensor pin, J2-12 vehicle exterior sensor pin, J2-13 evaporation sensor pin, J2-14 vehicle interior sensor pin, and J2-34 sensor GND pin.

[0011] Furthermore, the serial communication pins of the J2 external interface include the J2-18 serial communication RX pin and the J2-19 serial communication TX pin.

[0012] Furthermore, the external power supply pins of the J2 external interface include the J2-24 VSS external power supply negative pin, the J2-25 external power supply ignition power supply IGN pin, and the J2-26 external power supply battery power supply pin.

[0013] Furthermore, the actuator power supply pin of the external interface of J2 includes the J2-28 actuator GND pin and the J2-29 actuator 5V power supply pin.

[0014] Furthermore, the backlight test pins of the external interface J2 include J2-35 backlight power input pin, J2-36 backlight GND pin, and J2-37 backlight PWM input pin.

[0015] Furthermore, the relay control signal detection pins of the external interface J2 include J2-7 blower relay control signal pin, J2-38 compressor relay control signal detection pin, and J2-39 rear defrost relay control signal detection pin.

[0016] The beneficial effects of this utility model are as follows: it can realize the full-link core function testing of vehicle air conditioning controllers, including power supply compatibility, sensor signal interaction, actuator control, relay drive, and serial data communication, without the need for multiple devices, meeting the testing needs of R&D, production, and after-sales scenarios; through standardized multi-interface design and wide voltage input (DC8-16V) and multi-specification power output, it can be compatible with vehicle air conditioning controllers of different models and types, without the need for separate customized tooling, reducing testing costs; it supports both manual and automatic testing modes. The manual mode can specifically verify specific functions, while the automatic mode realizes batch standardized testing, reducing human operation errors and improving testing efficiency. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of the vehicle air conditioning controller test system of this application; Figure 2 This is a circuit diagram of the power module of this application; Figure 3 This is a circuit diagram of the MCU control module of this application; Figure 4 This is a circuit diagram of the J2 interface of the connector in this application; Figure 5 This is a schematic diagram of the sensor test circuit for this application; Figure 6 This is a schematic diagram of the structure of the P2 fan plate boundary in this application; Figure 7 This is a circuit diagram of the button and LED indicator module of this application; Figure 8 This is a schematic diagram of the test circuit for the fresh air actuator in this application; Figure 9 This is a schematic diagram of the actuator test circuit of this application; Figure 10 This is a general test circuit diagram for relays in this application; Figure 11 This is a power supply test circuit diagram for this application; Figure 12 This is a flowchart of the system workflow for this application. Detailed Implementation

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] This utility model discloses a vehicle air conditioning controller testing system, such as... Figure 1 As shown, it includes: MCU control module, power supply module, indicator module (button and LED indicator module), relay signal detection indicator module, actuator signal detection indicator module, acquisition module, sensor status simulation module, and connectors for connecting the product under test, actuator and sensor; The power supply module is connected to each module of the system and is used for power supply to the system and external output. The MCU control module is connected to each module of the system and is used for data processing and command control. The connector is connected to the MCU control module, the sensor status simulation module, the relay signal detection and indication module and the actuator signal detection and indication module to enable data interaction between each module of the system and the product under test, actuator and sensor.

[0021] The MCU control module is responsible for input signal processing and detection, output signal processing, making logical judgments, sending precise control commands to each execution and output module, and directly interacting with the product via serial communication through connectors.

[0022] The power module is responsible for supplying power to the entire system and for power output to external systems.

[0023] The button and LED indicator module allows for test state selection via buttons, while the LED status indicator directly indicates the product's functional status.

[0024] The relay signal detection and indication module is used to detect whether the blower relay signal, compressor relay signal, and rear defrost relay signal at the product end are normal, and to provide corresponding indication and display.

[0025] The actuator signal detection module is used to detect whether the control signals of the mode actuator, heating and cooling actuator, and fresh air actuator output by the product are normal, and at the same time provide corresponding indications and displays.

[0026] The acquisition module is divided into two parts. One part is for acquiring the actuator feedback signal, which is used to connect the actuator for calibration. The other part is for acquiring the power supply voltage and the output IGN and BAT voltages to ensure that the output voltage is in a normal state.

[0027] The sensor state simulation module is used to simulate the resistance parameters of actual sensors and provide data for the product.

[0028] The MCU control module and the product under test communicate via serial port to exchange data and confirm the working status of the product's MCU.

[0029] Furthermore, the power module supports a wide voltage input of DC8-16V and outputs power including IGN ignition power, battery power, actuator 5V power, and backlight power.

[0030] Furthermore, the connector includes a J1 MCU debugging interface, a P1 power supply interface, a P2 fan board interface, and a J2 external interface; the J1 MCU debugging interface includes a J1-1 DC3.3V power supply pin, a J1-2 GND ground pin, a J1-3 SW-CLK test clock pin, and a J1-4 SW-DIO test data pin; the P1 power supply interface includes a P1-1 positive power supply pin and a P1-2 negative power supply pin; the P2 fan board interface includes a P2-1 IGN power supply pin, a P2-2 blower power supply pin, a P2-3 blower feedback signal pin, a P2-4 blower speed control line pin, and a P2-5 IGN power ground pin; the J2 external interface integrates actuator connection pins, sensor connection pins, serial communication pins, external power supply pins, actuator power supply pins, backlight test pins, and relay control signal detection pins.

[0031] Furthermore, the actuator connection pins of the J2 external interface include mode actuator connection pins, fresh air actuator connection pins, and heating / cooling actuator connection pins; the mode actuator connection pins include J2-1 mode actuator + PIN pin, J2-21 mode actuator - PIN pin, J2-32 mode actuator limit signal PIN pin, and J2-8 mode actuator feedback signal pin, used to connect the mode actuator, detect the forward and reverse directions of the mode actuator, as well as the limit signal that needs to be rotated if jammed, and the feedback signal of the mode actuator position.

[0032] The fresh air actuator connection pins include J2-2 fresh air actuator 2 PIN pin, J2-22 fresh air actuator 1 PIN pin, and J2-23 fresh air power supply PIN pin, which are used to connect the fresh air actuator and provide the fresh air actuator with power signals and negative control signals for two positions.

[0033] The connecting pins for the heating and cooling actuator include J2-3 heating and cooling actuator-PIN, J2-4 heating and cooling actuator+PIN, J2-33 heating and cooling actuator limit signal PIN, and J2-9 hybrid actuator feedback signal PIN. These pins are used to connect to the heating and cooling actuator, detect the forward and reverse directions of the actuator, the limit signal that needs to be rotated if jammed, and the feedback signal of the actuator's position (hybrid actuator feedback signal).

[0034] Furthermore, the sensor connection pins of the J2 external interface include J2-10 light sensor pin, J2-11 water temperature sensor pin, J2-12 vehicle exterior sensor pin, J2-13 evaporation sensor pin, J2-14 vehicle interior sensor pin, and J2-34 sensor GND pin, which are used to connect the sensor output signal circuit and the grounding circuit to provide the sensor signals required by the product.

[0035] Furthermore, the serial communication pins of the J2 external interface include the J2-18 serial communication RX pin and the J2-19 serial communication TX pin, which are used to connect to the product serial port and exchange test data packets.

[0036] Furthermore, the external power supply pins of the J2 external interface include the J2-24 VSS external power supply negative pin, the J2-25 external power supply ignition power supply IGN pin, and the J2-26 external power supply battery power supply pin, which are generated by the board and used for external power supply.

[0037] Furthermore, the actuator power supply pins of the external interface J2 include the J2-28 actuator GND pin and the J2-29 actuator 5V power supply pin, which are generated by the board and used to power the actuator.

[0038] Furthermore, the backlight test pins of the J2 external interface include J2-35 backlight power input pin, J2-36 backlight GND pin, and J2-37 backlight PWM input pin, which are generated by the board to provide power and brightness signals for product backlight testing.

[0039] Furthermore, the relay control signal detection pins of the external interface J2 include J2-7 blower relay control signal pin, used to connect to the negative control signal detection of the blower relay and detect whether the product's blower relay control signal is normal; J2-38 compressor relay control signal detection pin, used to connect to the negative control signal detection of the compressor relay and detect whether the product's compressor relay control signal is normal; and J2-39 rear defrost relay control signal detection pin, used to connect to the negative control signal detection of the rear defrost relay and detect whether the product's rear defrost relay control signal is normal.

[0040] It also includes the J2-15 blower power supply pin; the J2-16 blower feedback signal pin; and the J2-17 blower speed control signal pin, which are used to connect to the P2 interface and transfer the product's blower-related signals to the blower speed control board.

[0041] like Figure 2As shown, the power cabinet module supplies power to the circuit board and outputs power to external devices via the P1 power line interface. It includes: an input protection unit to protect against incoming external voltages, preventing damage to subsequent circuits from reverse connections, surges, or other abnormal inputs; a buck regulator unit to step down and regulate the input voltage to a 5V output for medium-voltage loads (such as actuators and peripherals); a voltage divider unit to divide the input voltage and output a specific voltage to meet the power requirements of some peripherals; and a secondary regulator unit to further linearly regulate the 5V voltage to a 3.3V output for low-voltage sensitive components (such as logic circuits and MCUs).

[0042] like Figure 3 As shown in the figure, the MCU control module in this embodiment uses a chip of model GD32E230C8T6, corresponding to U2 in the figure, as the core processing unit. Its matching J1 MCU debugging interface is a dedicated 4-pin debugging link. The specific configuration and function implementation are as follows: The J1 debug interface has four functional pins. The hardware connections of each pin to the MCU control module are as follows: J1-1 DC3.3V power supply pin, directly connected to the system's 3.3V power supply network, providing a stable power supply for the debug link; J1-2 GND ground pin, connected to the system's common ground terminal GND, sharing ground with the MCU's VSS pin to ensure consistent level reference for debug signals; J1-3 SW-CLK test clock line pin, connected to the MCU (U2)'s PA14 pin, used to transmit clock synchronization signals during the debug process; J1-4 SW-DIO test data line pin, connected to the MCU (U2)'s PA13 pin, used for bidirectional transmission of debug data (including program instructions, status feedback information, etc.).

[0043] The core function of the J1 debug interface is program download and MCU testing. After connecting an external debugger to the J1 interface, the debugger sends a synchronization clock to the MCU through the SW-CLK pin of J1-3, and transmits program firmware data through the SW-DIO pin of J1-4, realizing the burning and updating of the MCU control program. During the module debugging stage, the J1 interface can read the MCU's register status, pin levels, running logs, and other information to verify whether the MCU's hardware connections (such as power supply, ground, and clock circuits) and basic logic functions are normal, and troubleshooting can be completed without additional module disassembly.

[0044] like Figure 4As shown, in this embodiment, the core connector for interaction between the system and the tested vehicle air conditioning controller and peripherals is the JAE MX34040UF2 type J2 external interface, and a serial communication level adapter circuit is also provided. The specific configuration and functions are as follows: The J2 interface is a 40-pin integrated connector. Each pin connects to a system function module and the product under test (DUT / peripheral). The core function pins are categorized as follows: Actuator connection pins, including control and feedback pins for mode actuators, fresh air actuators, and heating / cooling actuators, directly connecting to the actuator driver of the DUT to transmit actuator control signals and acquire feedback signals; Sensor / signal pins, including pins for light sensors, water temperature sensors, and in-vehicle / outside / evaporation temperature sensors, as well as input pins for button signals and backlight PWM signals, used to transmit analog sensor signals to the DUT or receive output signals from the DUT; Power supply pins, including IGN ignition power, BAT battery power, and actuator 5V power, providing the DUT with multi-specification power supplies consistent with the actual vehicle; Communication pins, including "MCU TX" and "MCU RX" pins, which are the link interface for serial communication between the system and the DUT.

[0045] The serial communication level adaptation circuit addresses the issue that the serial port signal of the MCU control module is at a 3.3V level, while the serial port level of the product under test may differ. This embodiment utilizes a dedicated circuit to achieve level adaptation: the TX / RX signals of the MCU control module are first connected to the circuit via current-limiting resistors R4 and R6, and then electrostatic discharge protection is achieved through bidirectional Zener diodes D1-D2 and TVS diodes TD1-TD2. Combined with a BTRS232G4V level converter and a Q1 switching transistor, the MCU's 3.3V serial port level is converted to a communication level compatible with the product under test, ensuring the stability and compatibility of serial data interaction between the system and the product under test, and avoiding communication packet loss and signal distortion problems caused by level mismatch.

[0046] like Figure 5 The sensor test circuit shown includes in-vehicle sensors, evaporation sensors, external sensors, water temperature sensors, and light sensors. This circuit consists of five parallel sensor resistance simulation branches, corresponding to the in-vehicle, evaporation, external, water temperature, and light sensors, all sharing the sensor GND ground terminal. Each branch includes: a filter capacitor to filter out signal interference; a current-limiting resistor to limit current and provide protection; and an adjustable potentiometer to adjust the resistance value to simulate sensor parameters under different operating conditions.

[0047] By adjusting the potentiometer, the analog resistance signal of the corresponding sensor can be output and transmitted to the vehicle air conditioning controller under test to verify its sensor signal acquisition and response logic, and to achieve accurate and stable sensor operating condition simulation.

[0048] like Figure 6 The P2 blower board wiring interface shown includes P2-1 (IGN power supply), P2-2 (blower power supply), P2-3 (blower feedback signal), P2-4 (blower speed control line), and P2-5 (connection to IGN power ground wire), used to connect to the blower test board circuit. This interface is used to connect to the blower test board circuit to realize the power supply, speed control signal transmission, and feedback signal acquisition of the blower, thereby verifying the blower drive and speed control functions of the tested vehicle air conditioning controller.

[0049] like Figure 7 The buttons and LED indicator module shown allow for test state selection via buttons, while the LED status indicators directly indicate the product's functional status, including power supply indication, manual test indication, automatic test indication, automatic test button, and manual test button.

[0050] Test mode selection: Press K1 (automatic test button) to switch the MCU to automatic test mode, and the corresponding automatic test indicator LED will light up; press K2 (manual test button) to switch to manual test mode, and the corresponding manual test indicator LED will light up; the digital tube displays the system power supply voltage in real time, and each function LED indicates the power supply status and the functional operation status of the product under test respectively; the buzzer LS1 sounds in conjunction with the fault code to enhance the fault indication effect.

[0051] like Figure 8 As shown, the fresh air actuator test circuit includes pin 2 of the J2-2 fresh air actuator, pin 1 of the J2-22 fresh air actuator, 1+ / 2- parallel detection, and 1- / 2+ parallel detection. The fresh air actuator test circuit includes relay JK1, freewheeling protection diodes D7 / D10, status indicator LED4, control transistor Q6, and current-limiting / voltage-dividing resistors (R19, R22, etc.). Different wiring methods of the actuator are detected by switching the relay contacts.

[0052] The circuit adapts to two working states of the fresh air actuator: When the actuator is in the "1+ / 2-" state, the relay JK1 contact switches to the corresponding path, and the circuit triggers LED4 to light up, indicating the normal working status of this state; when the actuator is in the "1- / 2+" state, the relay contact switches to the other path, and the function detection of this working mode is completed through the state change of LED4.

[0053] like Figure 9As shown, the test circuit for the mode actuator and the test circuit for the heating / cooling actuator have the same structure. Taking the mode actuator circuit as an example, it includes the J2-1 mode actuator + pin, J2-21 mode actuator - pin, J2-32 mode actuator limit signal pin, 1+ / 2- / 3+ parallel detection, and 1- / 2+ / 3- parallel detection. Similarly, the J2-3 heating / cooling actuator - pin, J2-4 heating / cooling actuator + pin, J2-33 heating / cooling actuator limit signal pin, 1+ / 2- / 3+ parallel detection, and 1- / 2+ / 3- parallel detection.

[0054] The circuit includes dual relays, freewheeling protection diodes (D8, D16), status indicator LEDs, control transistors and matching resistors / capacitors, corresponding to the mode actuator pins of the J2 interface: J2-1 (mode actuator +), J2-21 (mode actuator -), J2-32 (mode actuator limit signal).

[0055] By switching relay contacts, two types of states of the actuator are detected: when the actuator is in the "1+ / 2- / 3+" state, JK2 and JK3 contacts switch to the corresponding path, LED5 lights up, and the working status of this state is reflected; when the actuator is in the "1- / 2+ / 3-" state, the relay contacts switch to another path, and the state change of LED13 corresponds to the function detection of this mode.

[0056] like Figure 10 As shown, the relay test circuit includes a rear defrost relay, a blower relay, and a compressor relay, all with identical structures. It includes relays, a freewheeling protection diode, a status indicator LED9, a control transistor, and resistors and capacitors for current limiting / filtering.

[0057] Functionality: When the vehicle air conditioning controller under test outputs a drive signal to the corresponding relay, the transistor conducts, triggering the relay to engage; simultaneously, LED9 illuminates, providing clear feedback that the relay is in operation. This functionality can be directly reused for testing rear defrost, blower, and compressor relays; the freewheeling diode suppresses the back electromotive force when the relay coil is de-energized, preventing component damage.

[0058] like Figure 11 As shown, the backlight and IGN / BAT power supply circuits have the same structure. Backlight power supply involves first turning on the backlight power, checking that the backlight illuminates normally, starting a test, checking that the backlight changes normally, and then turning off the backlight power. BAT power supply involves supplying power to the BAT, detecting "fresh air power," but not "actuator 5V power." IGN power supply involves disconnecting the BAT, then supplying power to the IGN, detecting both "fresh air power" and "actuator 5V power."

[0059] like Figure 12As shown in the figure, the working process of the system includes powering on the system, the LED digital tube indicating the voltage of the test bench, and reporting a fault code when the voltage is out of the working range. Then, the test bench is overhauled. When the voltage state is normal, the tester presses the manual operation button to start the manual operation detection process. The tester manually tests the product keys and the like, and the indicator light of the test bench gives an indication in the manual state.

[0060] If a problem occurs in the middle, the test is stopped and the product is subjected to fault overhaul. If all intermediate tests are normal, after the manual test is completed, the tester presses the automatic test button, and the test bench outputs an automatic test. At this time, the indicator lights are lit in sequence, and when there is a problem in the test, the LED of the test bench gives an indication, and the module will report a corresponding fault code. The tester performs a corresponding overhaul action according to the reported fault code. If the automatic test is normal, the product is qualified.

[0061] A total of 23 sets of fault codes from E01 to E23 are preset, which respectively correspond to different fault types and impacts: among them, E01 corresponds to communication loss, E02 corresponds to abnormal 12V output of storage battery power supply, E03 corresponds to abnormal 12V output of IGN power supply, E04 corresponds to abnormal 5V output of IGN power supply, and the system will stop testing when the above four types of faults occur; E05 corresponds to abnormal fresh air positive control output, E06 corresponds to abnormal mode positive control output, E07 corresponds to abnormal cooling and heating positive control output, E08 corresponds to abnormal fan high-speed output, E09 corresponds to abnormal rear defrost output, E10 corresponds to abnormal compressor output, E11 corresponds to abnormal cooling and heating negative control output, E12 corresponds to abnormal mode negative control output, E13 corresponds to abnormal fresh air negative control output, E14 corresponds to abnormal fan operation, E15 is a reserved fault code, E16 corresponds to abnormal in-vehicle sensor, E17 corresponds to abnormal defrost sensor, E18 corresponds to abnormal outdoor sensor, E19 corresponds to abnormal water temperature sensor, E20 corresponds to abnormal power supply voltage collected by the controller, E21 corresponds to abnormal cooling and heating feedback voltage, E22 corresponds to abnormal mode feedback voltage, E23 corresponds to abnormal PWM input collection, and the system will continue testing when the above nineteen types of faults occur.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall all be included in the protection scope of the present utility model.

Claims

1. A vehicle air conditioning controller testing system, characterized in that, The system includes: MCU control module, power supply module, indicator module, relay signal detection and indicator module, actuator signal detection and indicator module, acquisition module, sensor status simulation module, and connectors for connecting the product under test, actuator and sensor; The power supply module is connected to each module of the system and is used for power supply to the system and external output. The MCU control module is connected to each module of the system and is used for data processing and command control. The connector is connected to the MCU control module, the sensor status simulation module, the relay signal detection and indication module and the actuator signal detection and indication module to enable data interaction between each module of the system and the product under test, actuator and sensor.

2. The system according to claim 1, characterized in that, The power module supports a wide voltage input of DC8-16V and outputs IGN ignition power, battery power, actuator 5V power, and backlight power.

3. The system according to claim 1 or 2, characterized in that, The connectors include a J1 MCU debugging interface, a P1 power line interface, a P2 fan board interface cable, and a J2 external interface. The J1 MCU debug interface includes J1-1 DC3.3V power supply pin, J1-2 GND ground pin, J1-3 SW-CLK test clock line pin, and J1-4 SW-DIO test data line pin; The P1 power line interface includes a P1-1 positive power pin and a P1-2 negative power pin. The P2 fan board interface includes P2-1 IGN power pin, P2-2 blower power pin, P2-3 blower feedback signal pin, P2-4 blower speed control line pin, and P2-5 IGN power ground pin. The J2 external interface integrates actuator connection pins, sensor connection pins, serial communication pins, external power supply pins, actuator power supply pins, backlight test pins, and relay control signal detection pins.

4. The system according to claim 3, characterized in that, The actuator connection pins of the J2 external interface include mode actuator connection pins, fresh air actuator connection pins, and heating and cooling actuator connection pins; The mode actuator connection pins include J2-1 mode actuator + pin, J2-21 mode actuator - pin, J2-32 mode actuator limit signal pin, and J2-8 mode actuator feedback signal pin; The fresh air actuator connection pins include J2-2 fresh air actuator 2-pin, J2-22 fresh air actuator 1-pin, and J2-23 fresh air power supply pin; The heating and cooling actuator connection pins include J2-3 heating and cooling actuator-PIN pin, J2-4 heating and cooling actuator+PIN pin, J2-33 heating and cooling actuator limit signal PIN pin, and J2-9 hybrid actuator feedback signal PIN pin.

5. The system according to claim 3, characterized in that, The sensor connection pins of the J2 external interface include J2-10 light sensor pin, J2-11 water temperature sensor pin, J2-12 vehicle exterior sensor pin, J2-13 evaporation sensor pin, J2-14 vehicle interior sensor pin, and J2-34 sensor GND pin.

6. The system according to claim 3, characterized in that, The serial communication pins of the J2 external interface include the J2-18 serial communication RX pin and the J2-19 serial communication TX pin.

7. The system according to claim 3, characterized in that, The external power supply pins of the J2 external interface include the J2-24VSS external power supply negative pin, the J2-25 external power supply ignition power supply IGN pin, and the J2-26 external power supply battery power supply pin.

8. The system according to claim 3, characterized in that, The actuator power supply pins of the external interface J2 include the J2-28 actuator GND pin and the J2-29 actuator 5V power supply pin.

9. The system according to claim 3, characterized in that, The backlight test pins of the J2 external interface include J2-35 backlight power input pin, J2-36 backlight GND pin, and J2-37 backlight PWM input pin.

10. The system according to claim 3, characterized in that, The relay control signal detection pins of the external interface J2 include J2-7 blower relay control signal pin, J2-38 compressor relay control signal detection pin, and J2-39 rear defrost relay control signal detection pin.

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