How to match the throttle?

The throttle of the Volkswagen model matches the teacher Liao Mingjiang of Guangzhou North Automobile Maintenance School. Before understanding the throttle matching, we have a basic understanding of the function of the throttle: as the main component of the engine, the throttle is installed in front of the engine intake manifold to control the air entering the cylinder, thus controlling the power output of the engine. When the throttle body becomes dirty after running for a certain period of time, when idling, or when the air intake is blocked, the air intake will decrease at the same opening, which is not enough to maintain the rated engine speed; Or because of dirt, the throttle shaft is stuck, so that the throttle cannot be closed to its original position, which increases the air intake and the idle speed is too high. At this time, it is necessary to clean the throttle valve to make the air intake smooth or reduce the throttle opening when idling, but the memory value of the ECU of the automobile computer has not been cleared, which leads to the deviation between the ECU and the signal values actually input into the computer by various actuators or sensors, resulting in the unstable operation of the engine. At this time, we need to "basically adjust" the actuators or sensors of the automobile with the automobile decoder, so that the memory value of the ECU of the automobile computer can match the initial state of each actuator, and the electronic control unit can understand the basic characteristics and parameters of the throttle body, so as to automatically adjust its actions with the throttle in the future operation process. If the throttle valve does not match after replacing or disassembling some parts, there will be disharmony between the electronic control unit and the idle speed control element, which is characterized by inaccurate and unstable idle speed control, such as high and low idle speed and unstable idle speed.

Precautions for throttle matching: 1, and there is no fault code in the computer; 2. The battery voltage shall not be lower than11.05v; 3. Turn off all accessories, such as radio, stereo, air conditioner and seat heating; 4. The throttle switch is in the idle position; 5. Generally, don't start the engine when doing idle speed adjustment, but the old models need to start the engine; 6. It must be under the menu of "Basic System Adjustment" instead of "Channel Adjustment Matching"; 7. The channel number is 098,060 or 00 1.

Conditions requiring throttle matching: 1. After replacing the electronic control unit, the characteristics of the throttle body are not stored in the electronic control unit, so throttle matching is needed. 2. After the electronic control unit is powered off, the memory of the memory of the electronic control unit is lost, and the throttle valve needs to be matched. 3. After replacing the throttle body, it is necessary to match the throttle. 4. After replacing or removing the air inlet, it will affect the coordination between the electronic control unit and the throttle body to control the idle speed, and it is necessary to match the throttle. 5. Although the characteristics of the idle throttle potentiometer have not changed after cleaning the throttle body, the intake air volume has changed and the idle control characteristics have changed under the same throttle opening, so it is necessary to match the throttle. Jacky X-43 1 is used to match the throttle of Volkswagen, which shows that the throttle adjustment matching is only applicable to Volkswagen with electronic throttle engine system. Jetta's two-valve engine system's throttle adjustment matching channel number is 060, and the channel number of five-valve engine system is 098. 1. Basic setting: When the ignition switch is turned on, the throttle control unit and the engine control unit can adapt themselves. 2. Basic setting process: when the throttle is matched, the throttle regulator moves from the maximum position to the minimum position during emergency operation, and the engine control unit learns the dead center position of the throttle control unit and the comparison curve between the potentiometer of the throttle and the sensor of the throttle controller through self-adaptation. 3. Basic setting method and steps: (1) Turn on the ignition switch to start the engine. (2) Connect X-43 1 decoder and select common diagnostic software. (3) Enter the "Engine System", select the "System Basic Adjustment" function, and enter the adjustment group number: 098, 060 or 00 1. Channel numbers of common vehicles: 00 1, Xiaoqing 488, Passat B4, Audi (100, 200, V6 and other old models) 098 Santana GSI, Passat B5( 1.8), Jetta King (5 valves), Audi (A6, V6). 2.4, 2.8), Passat B5 control unit stores the corresponding throttle angle in the memory, which takes about 10 seconds, and then the throttle is in the initial position for a short time, and then closed. (5) When the words "adaptive completion" are displayed on the last line of the screen, the basic settings are completed. Press the "Exit" key to complete the setting, turn off the ignition key, then turn on the ignition key, start the engine, and verify the matching effect. (6) If there is an error in the matching process, the following two phenomena will often occur: the first phenomenon: the words "this car does not have this function" are prompted, or the last line of the screen prompts "adaptive matching" and then prompts "this car does not have this function", which is generally caused by the following reasons: 1). Please refer to the contents of the channel numbers of the common vehicles in the front of this article to select the appropriate channel number (applicable) 2) The throttle control unit or the wire is damaged (if applicable, prompt "adaptive matching in progress" first, and then prompt "this vehicle does not have this function"). The second phenomenon: the words "adaptive error" are prompted in the last line of the screen, which is generally caused by the following reasons: 1) The engine is in the automobile state, please turn off the engine and turn on the electric fire button; 2) The throttle does not reach the idle stop point: for example, carbon deposit or improper adjustment of the throttle zipper; The throttle lock is too tight; The throttle is stuck. 3) The battery voltage is too low; 4) The throttle control unit or wire is damaged; 5) The throttle body is too dirty; 6) Start the engine or press the accelerator pedal in the adaptive process.

(7) After the interruption, the fault "17967" or "17973" will be stored in the fault memory, and the basic settings will be automatically reset after the ignition switch is turned on next time. Example of throttle matching of common models: Example 1: The basic throttle setting of Jetta Avant-garde (two-valve) models is 1. Description: The avant-garde Jetta adopts the multi-point gasoline injection and ignition system of the 2V-MPI EFI engine produced by Siemens, and this model must be "self-adaptive cleared" before the "basic system adjustment". 2. Basic setting method and steps: Turn on the ignition switch to start the engine. 1) Connect X-43 1 decoder and select common diagnostic software. 2) Enter the "Engine System", select the "Channel Adjustment and Matching" function, and enter the adjustment group number "00"; 3) Press "OK" to clear the learning value, and the words "Learning value has been cleared" will be displayed on the screen; 4) Select the "System Basic Adjustment" function and enter the adjustment group number: 060; 5) Press the "OK" key to enter the setting process, and the throttle controller passes through the minimum to maximum point and the middle five positions. The control unit stores the corresponding throttle angle in the memory, which takes about 10 seconds, and then the throttle is in the initial position for a short time, and then closed. 6) When the words "Adaptive Completion" are displayed on the last line of the screen, the basic settings are completed. Press the "Exit" key to complete the setting, turn off the ignition key, turn it on again, start the engine, and verify the matching effect. Example 2:

Jie Jun and Shi Chao: 1. Turn on the key and don't start the engine; 2. Use X43 1 electric eye to enter the engine system; 3. Read the code and clear the fault code (if there is any fault, it must be eliminated first); 4. Enter "basic system adjustment"; 5. Enter "098" and press Enter to prompt "Adaptive Normal"; 6. Turn off the key, exit the software and restart. Example 3: Santana GLI (mechanical throttle body) 1. Turn on the ignition switch and do not start the engine; 2. Enter the "engine system" to read the code and clear the fault code (if there is any fault, remove it first); 3. Enter "System Basic Adjustment" and enter the channel number "001"; 4. The fourth prompt of data flow is "00000000" (indicating no fault); 5. Turn on the ignition switch, do not start the engine, and manually adjust the throttle (from the minimum position to the maximum position).