Methods of RXX Principle of operation. A simple tester of stepper RXX connection diagram of a single-running sensor

In cars equipped with an injector, for idle engine speed and cold launch A separate actuator (RCX) is responsible, controlled by the controller. Although its design is simple and reliable, during operation a car, an element may not work correctly either, as any other detail, refuses due to natural wear. How to identify the symptoms of the fault and check the regulator idle move in garage conditions, describes in detail in this publication.

How does the regulator work?

In the use of RXH, it is often called the sensor, although in reality it is not. The element is a stepper engine enclosed inside an unintellular housing. The outside protrudes only spring-loaded rod with a cone-shaped tip. At the command of the ECU, the engine nominates either pulls the rod for a certain distance.

The idle sensor is located in the throttle block, the working cone is pulled into the low-sequence channel. Since the launch of the motor and work at idle turns is made without pressing the accelerator pedal, the said channel provides air supply to the cylinders when the throttle is closed. The RXH task is to adjust the air flow, overlapping the cone part of the passage section.

For a better understanding of the issue, it is worth representing the principle of operation of the idling sensor in the form of an algorithm:

1. After turning on the ignition driver, the controller drives the engine of the regulator, forcing the opening of the air channel of the idle. The opening value of the ECU calculates on the temperature sensor - if the engine is cold, the rod will move away stronger.
2. At the time of launching the nozzles, a rich mixture is fed into the cylinders. Then the amount of fuel is reduced so that the motor does not "suffocate" and not stalled. The number of revolutions is monitored by the control unit using the position sensor crankshaft.
3. The volume of the air arriving through the PCX is taken into account by the DMRV sensor, standing on the inlet nozzle, while the increased circuls of the crankshaft (1200-1500 rpm) are supported.
4. By temperature sensor The control unit "sees" that the engine warms up and gradually reduces idle speeds, giving the RXX command to cover the cross section of the bypass channel. When the temperature reaches an acceptable value (60 ° C or more), the regulator maintains turns at the level of 850 rpm.

Note. If a heated motor is launched, the controller immediately sets the RCX stock into the working position corresponding to normal idling.

Symptoms and Causes of PCH fault

Signs of the malfunction of the idle sensor are manifested as follows:

• with a cold start, the number of crankshaft revolutions does not increase, which means the engine is unstable and seeks to stall;
• there is a drop in the number of turns of XX after a significant increase in the load on the generator - the inclusion of headlights, electrical heaters, and so on;
• motor periodically stalls at the time of turning off any transmission mechanical gearbox (symptom manifests itself in the process of movement);
• the turnover "float" - spontaneously increase and decrease.

Important moment! There is an erroneous view that the regulator breakdown is necessarily accompanied by the inclusion of the indicator Check Engine on the dashboard. Since the element is an actuator, the light warning option is provided not in all vehicles.

If the machine is noted by the signs of the PCH fault in the form of floating rotation of the motor at idle, you may need an extended diagnosis. The spontaneous change in the rotational speed of the crankshaft occurs for many reasons - the failure of a sensor, air drum, a malfunction of gas distribution, and so on. Troubleshooting is better to start from checking the regulator.

RCX failure occurs in three main reasons:

1. Open or bad contact in the power circuit. Simply put, problems with wiring.
2. Cleaning a stepper motor due to natural wear. In this case, only the replacement of the idling sensor will help.
3. Pollution of rod and cone with oil collapse.

There is a fourth reason - malfunctions electronic block Control. The problem occurs quite rarely and is accompanied by additional signs - increased gasoline consumption, unstable work In all modes, hindered start and the like.

Oil naigu falls on a rod due to secondary gases, directed by the crankcase ventilation system for re-afterburning. The fact that the engine is, the more deposits increase on the working cone. As a result, the movement of the rod makes it difficult, in the launched cases, the mechanism simply encourages.

Ways to diagnose the sensor

The simplest way to check the idling sensor for performance is to start the motor and remove the power connector from the pads. When the item is in good condition, the turnover will fall sharply and the engine will stop - when the power supply is turned off, the spring will push the cone forward and the cross section of the bypass canal will be completely closed. If the operation of the motor remains the same or changed slightly, go to other ways to check.

The next stage of diagnostics is the supply voltage measurement, which is performed in this order:

1. Disconnect the PXX connector and turn on the ignition.
2. Using a voltmeter, measure the voltage on the corresponding contacts of the removed connector (in VAZ vehicles are terminals with the designations A and D).
3. If the voltage is missing or does not reach 12 volts, you need to look for the problem in the wiring. Otherwise, proceed to the diagnosis of the regulator itself.

In VAZ cars, you can check the performance of the stepping electric motor without removing from the machine. Using a multimeter, measure the resistance between the following vapor pairs: A - B, C - D (it should be 53 ohms). Then measure other pairs - a - c, b - d, in a good regulator, the device will show infinity.

Further testing of the idling sensor is done like this:

1. Turn off the power block, unscrew the fastening screws and pull out the element from the throttle block.
2. To eliminate the pollution of the rod, clean the cone and spring with a soft pile brush using kerosene, diesel fuel, and better - liquid for flushing carburetors. Do not use acetone and type 646 solvents - they destroy plastic.
3. Purge the cleaned part and connect the connector.
4. Applying a finger to the stock, ask for an assistant to turn on the ignition. The cone of the working regulator must significantly move. If nothing happened, boldly change the sensor.

Council. When a strong oil nagar is found on the working part of the RCH, it is extremely desirable to perform the procedure for cleaning the throttle and the bypass channel - there is probably a similar picture is observed.

To install a new regulator, be sure to remove the "minus" terminal rechargeable battery. After assembly and connection, the PCH controller is calibrated - you need to turn on the ignition and wait for 15 seconds. If the battery does not disable, the computer will miss the calibration step, which is why the engine can work unstable.

An idle regulator (RXX) is one of the main executive mechanisms of the engine control system. From its correct work depends the stability of speeds at idle, fuel consumption, situations with sudden joy of the engine.

RXX is in working condition almost constantly, so its resource is not very large, usually up to 200,000 kilometers. In the practice of repairing car engines, even with a small experience, the regulator failure is found quite often.

RXH: What it is and its principle of work

Idling regulators are usually built in two schemes:

• direct control of throttle valve;
• adjusting the transmission channel of the throttle channel.

As an actuator in gasoline engines Usually a stepper motor is used. It has advantages over other drives: great accuracy, less current consumption, the ability to control in a pulse mode.

Air supply circuit via bypass channel is shown in the figure:

Thus, with the full closing of the throttle, the engine turnover is maintained by partial tributary via bypass (optional or bypass, from BYPASS - move bypass) channel.

The locking needle of the RXX valve, moving through the commands of the engine control unit, adjusts the width of the valve clearance, respectively, air flow into the engine, on which its turns depend.

For each type of engine, the manufacturer sets the optimal frequency of idle speed, which is usually ranging from 600 to 1000 revolutions per minute.

Direct operational regulators on the flap adjust the terminal closing angle directly by leaving a small slot to maintain admission to the intake manifold air, respectively, providing idling.

Video about RXX - what it is, the principle of operation and design options:

Control of the number of revolutions The control unit usually produces in the engine speed flowing from.

Single idling sensor how some motorists are mistaken, in modern cars not.

Most engine control systems are constructed in such a way that when you press the accelerator pedal and increasing revolutions, the RXC drive disabled and remained last before accelerating the state. Thus, the load on the controller drive is reduced.

IN diesel engines To maintain idle speed, the control of fuel flow is also used by bypass type. To do this, in fuel pumps high pressure Applied special electronic system regulation.

Solenoid or rotary valves are used as high-pressure fuel pumps. Such drives use only two levels of opening bypass channel - "open" or "closed".

This way is difficult to provide accurate installation idle speed. Therefore, the valves are controlled by a pulse modulated high frequency signal (PWM-modulation). The greater the width of the pulse, the more the bypass channel is open for the period, that is, the revs are increasing.

Pulse transistors, valve control, are often installed in the electronic unit on the fuel pump. For their cooling, diesel fuel flowing through the pump is used.

If the fuel ends, the transistors cease to cool effectively, overheat and fail. The transistors themselves are inexpensive, and the work on their replacement is not cheap. therefore ride the last drop of diesel fuel is not worth!

Signs of Fault RCX

The main signs of the malfunction of the idle regulator are:

• "Swimming" engine speed at idle;

• increased either low engine speed;

• spontaneous engine stop when switching gearbox to neutral mode;

• at the moment of cold start, the engine operates at elevated circulation, as it warm up, they resets, the absence of this mode is also a sign of a regulator malfunction;

• reducing the frequency of engine speed when an additional load is turned on (stoves, headlights, brushes and other powerful consumers).

Where is the regulator and its design

The appearance of the RCH with the bypass system is depicted in the photo:

Separation view:

RXH in some cases can be repaired if the winding has broken, or the rod jamble. Disassembly of the regulator should be made with special accuracy. In some cases, it can be restored by cleaning.

A typical location of the PCX is directly on the throttle. Dismantling regulators usually does not cause difficulties.

How to check idle regulator

Error messages RXX in the form of a message of the "idle regulator, a short circuit or circuit breaking". Usually, the malfunction is in the chain cliff.

This may be a malfunction of the winding (opening) directly regulator or disruption of electrical communication with the engine control unit. And the one and the other option should be checked.

You can check the help of windings using a multimeter in the resistance measurement mode at the limit 200 Ohm. Resistance to the windings of a serviceable stepper motor is usually ranging from 30 to 100 ohms. The windings are connected through an idle regulator connector according to the electrical circuit.

Video - check, diagnosis and replacement of RCH on Lanos, chance, forz, Cherry, Sens:

Very frequent cause of idling regulator breakage - rod jamming. There is moisture, extraneous liquids, dust, which leads to its corrosion and jamming. In order to check this, a special pulse signal generator is needed for forced control of the controller drive. Such check is possible only for a hundred. In this case, cleaning can help.

The most reliable way to verify performance is the installation of an obviously good idle regulator from a similar engine.

How to clean

In order to clean the RXX, it must be dismantled with a regular place and disconnect from the connector.

Some experts immediately resort to cleaning with aggressive means of type WD. It is not right.

You must first try to separate the neutral regulator silicone lubricant. It is not scary if it falls inside the regulator. If the lubricant did not help, consistently begin to clean with alcohol, solvents, means for cleaning carburetors, and finally, if nothing helped, the most aggressive WD-shki.

The cleaning is carried out by the method of partial soaking of the region of the stock-working hole for 10-15 minutes, after which it is possible to blow this zone with the compressor.

In some cases, the reason for the malfunction of the idle control system is to clog the bypass channel. It must be cleaned first. Channel cleaning can be carried out by any suitable means with soft brushes from natural fibers.

Replacement

When replacing the RHX, it is necessary to pay attention to the position of the valve valve rod. In no case, he should not be significantly advanced. This is possible if you connect to the connector before installing it and turn on the ignition. Manually moving the rod can not.

If the adjuster with an extended stem is installed and clamping the mounting bolts, it is possible to damage the regulator (Cutting the worm gear). The regulator with such a malfunction is not subject to repair.

After replacing the idle regulator in some cars requires a calibration procedure. It is performed using diagnostic devices on special equipment.

as you can see, the diagram is elementary, but there is a nuance. Used RESET foot. Consequently, if on the usual programmer (a-la avreal on the LPT port), it first to flash fuces - the controller turns into a piece of silicon - the firmware is just not foul into it. Only a high-voltage programmer. I stitched on Mini-Pro - he is cunning and everything went fine.

the author is cut in current protection - I even put current tocimer resistors. Well, just in case, he set the LEDs at the exits "Error" of the heading control chip. You look will be useful when.

the fee was not very good, it would be necessary to apply Conder on the mind too to apply, plus he thought to put the revolve regulator - a variable resistor. But I collected with a trimmed (there is also a place for him) - and did not even touch him. Furious resistance and fell instead of a constant resistor on 18k.

perhaps it would also be necessary to make the "Opel / Renault" switch (these RXHs have different pinouts), but for this you first need to take a regulator from Reno in the hands, and then I don't think something to throw some wires. It's easier, perhaps, stupidly a second connector hang ...

so, who needs - you can safely recommend. The scheme is primitive, the cost of bucks is probably 10, if you count everything. The most expensive and deficit item is TLE, it cost in somewhere 6 bucks. I had a tinka, so Hz, how much she is now ...

Upd.: For Reno, you need to change the wires of the wire A and C on the PXX connector.

The idling regulator (RXH) or as it is also called - the adjustable air regulator (RDV) is attached to the receiver of the ZMZ-409 engine through the rubber-metal holder. Purpose of the idling controller on the engine - control of an additional bypass air channel, made bypassing the throttle.

General device, principle of operation and applied types of regulators on the engine ZMZ-409.

The idling regulator is a two-winding rotary solenoid with a slotted bore, whose cross section changes according to the program of the electronic control unit. Structurally, it consists of a cylindrical body, with intake and rotated 90 degrees with graduation fittings, inside which two-winding electric motors are placed direct current and a spring-loaded valve in the form of the sector, and the plug of the connector compressing in the housing.

The rubber hose from the regulator is supplied to the outlet fitting of the regulator, and the input fitting is a rubber hose from the side fitting of the throttle device. All hose connections are compacted by clamps. Connecting a regulator to the wiring harness is made by three-pin socket with a latch.

RXX performs the following main functions:

- Automatic start and engine warming at idle
- Stabilization of minimum idle speed
- control of cyclic air filling on partial loads
- Damping of air flow with a sharp opening and closing throttle.

The power supply of the electromagnetic winding of the regulator is carried out from the onboard network through, and the inclusion of the windings is made by closing them to the mass through the power channels of the control unit. The direction of the air flow is indicated by the arrow on the chassis of the regulator.

When the constant magnetic field of the rotor of the regulator with a variable magnetic field of the stator, which is formed by the control pulses of the variable duty with a frequency of 125 Hz, the rotor, together with the valve turns to the specified angle and changes the passage section of the bypass channel, through which the intake air falls into the engines of the engine, bypassing Throttle.

The degree of opening of the idle regulator varies from the full opening (240 steps) on the engine start to full closure in the forced idle mode, at idle the knob is open for about 85-100 steps (35-45%) for a heated engine.

On the ZMZ-409 engines, the BOSCH ZWD-5 0 280 140 545 or its analogues of the PCH-60 and RXH-60 9E.573,000 of various manufacturers are installed on the ZMZ-409 engines.

External manifestations of a malfunction of the idling regulator of the ZMZ-409 engine.

Signs of the malfunction of the RXH or its chains in most cases are increased turnover of the stroke of the heated engine, or the engine starts and stalls or starts only when the gas pedal is partially pressed. In such cases, it is necessary to check the condition of the bypass channel and the knitting of the regulator, if necessary, clean them from dirt and rinse.

If the engine starts when the regulator hose is shifted, it means there is air through a loosely covered choke, therefore you need to adjust the drive and the throttle of the throttle device to full closure. If the electrical circuits of the regulator faults malfunction, the self-diagnostic system includes a malfunction lamp and issues errors.

Mikas-7.2.

161, 164 - short circuit winding 1 or 2, respectively, additional air regulator

- short circuit on board control chain controller
- malfunction, closure of the winding of the regulator
- Control unit fault

162, 165 - circuit breakage 1 or 2, respectively, control regulator of additional air

Possible causes of malfunction:

- The controller is not connected to the wiring harness
- Opport of the power supply of the regulator
- Open control chain controller
- malfunction, cliff of the regulator winding

163, 166 - short circuit on the "mass" chains 1 or 2, respectively, control of the adjustable air regulator

Possible causes of malfunction:

- Circuit on the mass of the management chain of the RDV
- malfunction, short circuit on the housing of the winding of the RDV
- Malfunction of the control unit.

Mikas-11.

0505 - idle regulator chain malfunction
0506 - low idling speed, idling regulator blocked
0507 - High idling speed, idling regulator is blocked
0508 - Short circuit circuit control circuit of a walking regulator of idling for mass
0509 - Short circuit circuit control circuit of a running idle regulator to flight
0511 - Cutting the control circuit with a stepping nozzle regulator
1509 - Overload control circuit of the idle controller
1513 - short circuit on the mass of the idle control regulator
1514 - short circuit on a barthut or breaking chain control of the idle regulator
1750 - short circuit on boarding chains number 1 of the inspection regulator of idling
1751 - Cutting chain No. 1 of the inspection regulator of idle
1752 - short circuit on the mass of the chain number 1 of the inspection regulator of idle
1753 - Short circuit on the aircraft chain number 2 of the inspection regulator of idling
1754 - Circuit Circuit No. 2 of the Inspection Regulator of idle
1755 - short circuit on the mass of the chain number 2 of the inspection regulator of idle

Check the operation of the idling regulator by its standard parameter.

It is possible with the help of connected onboard or, which can read and output in real time to its display this value. The position or opening of the idle regulator (FSM) on a heated temperature of 80-100 degrees and in idling the ZMZ-409 engine should be in the range of 22-34%. When controlling this typical parameter, all electricity consumptions, including an electric fan and, must be turned off.

If the position of the idle regulator is understated, then most likely ajar throttle valve In a normal closed position or its drive is not adjusted. If the PCH position is increased, then the air intake is underway through a normally closed throttle device, the regulator sector is focused or is faulty.

When any fault codes appear, it should be determined that it is faulty - PXX, its power circuit or an engine control unit. To do this, turn off the ignition and disconnect the knob from the wiring harness. Then turn the ignition, reset all error code and in 10-20 seconds again check their presence. If the previous errors are recorded, the control unit is faulty or wiring harness if another code is fixed, it means a malfunction in the regulator.

To check the power supply to the regulator, you need to disconnect the protective cover of the wiring harness outlet, turn on the ignition and check the voltage between the output "2" of the regulator and the engine weight. The voltage must be approximately equal to the battery voltage. If the measured voltage is close to zero, then the power circuit break occurs.

Active resistance to the winding of an additional air regulator is checked when the ignition is turned off and disconnected wiring harness. It must be within 11-13 ohms excluding the transitional resistance of the contacts of the ohmmeter. If the resistance is smaller, then most likely there is an internal short circuit of the controller winding.

Additionally, it is necessary to check the resistance between the contact "3" of the RDV plugs and metal engine parts. If this resistance is close to zero, most likely there is an internal short circuit of the winding of an additional air regulator onto its housing.

to facilitate life, which, with certain skills,
Easy to do at home

Tester to check forst
© Tom, Miha

Specification: C1 -15 PF, C2 -8 -30 PF, C3 -0, 1 μF, C4 -0, 047 MKF, C5 -470 ґ25 V, C6 -0, 1 μF, C7 -2200 X25 V, R1 -4 , 7 -6, 8 MΩ, R2 -130 com, R3 -100 com, R4 -10 com, R5 -10 com, R6 -1 MOM, R7 -1, 2 com, R8 -130 Ohm, R9 -220 Ohm, R10 -0, 2 -0, 25 Ohm, R11 -470 OBL L1 -200 ICGN, Z1 -400 kHz (50 -800 kHz)

DD 1, DD2 -K561 ye16, DD3 -K561 TM2, DD4K561 le5, VD2 -KD212, VD1 -KD521, VD3 -KD213, VT1KT3117, VT2 -KT817, VT3 -T3102

Ya. 1 - Forship
SA 1 - Pulse duration
SA 2-Clearing the number of pulses
SA 3 Connecting Continuous Mode
SB. 1 - "Start"

Short description : DD 4.1 - a specifying generator, a quartz applied for stability. The duration of the nozzle pulses duration is performed on the DD1 counter. The pulse duration can be selected 2, 5 or 5 ms SA1 switch. At the DD2 meter, the doser of the number of pulses is performed. The number of pulses is selected by the SA2 switcher. SA3 switch (fixed) can be enabled continuous mode. This is necessary when washing nozzles, including ultrasound. SB1 is the "Start" button, the dispenser starts to work on it. C3, R3 - Used to install in zero DD2, DD3 .1 when power is turned on. VD1, R6, R5, C4 - suppresses SB1 rattles. You can do without it, but with a long press on SB1, a re-inclusion of the dispenser may occur. VT3 - A parody of protection against KZ, with it VT2 (KT817) can withstand a pair of dispenser operation cycles. Instead of VT1, VT2, you can put composite CT972 or CT829, but then we lose another 1 volt on Unaus. When feeding the device from the battery of the car stabilization of the power to the microcircuit is not necessary. If from another source, then in series with L1 you need to put the resistor and the stabilion on 10 -15 V. in Fig. 1 shows the signal at the output DD4 .4. The diversity is close to the operating conditions of the signal on the nozzles. Racing can be fixed only with a good oscilloscope and they do not affect the operation of the device. The fission coefficients of meters can be changed as needed - these meters allow it to do in wide limits, but multiple two.

Tester nozzles on kr1006 Vi1
© ukr-vlad

Another option sent by Vladimir, Aka UKR-Vlad, from abroad, from Ukraine.
D1, D2 -KR1006 Vi1. D1 Ford of the duration of the pack (adjustable R1) D2 Pulse pulse on the nozzle (approximately 5 ms. R2 is adjusted). P1-I did from 4 MP (conveniently - you can set any combination)

For launch it is necessary:
1. Connect the nozzle connector with the tester
2. Using food on the tester
3.Sign nozzle number or several
4. Sign and release the button (not more than 1 sec.)

The tester is minimized. But everything you need performs and is quite stable.

Device for imitation of DPKV signals
© Mikhail Uhanov. Rostov

Short description of the scheme:On the elements d1 .1, d1 .2 the generator with a variable frequency is assembled, since the output from the generator has an asymmetrical meander, then it is the element d2 .1 which divides the frequency to 2 and forms right signal. The signal arrives at the counter d3, the counter has a dialed coefficient 60, the output pulse from the counter enters the trigger d2 routing trigger and resets its output than the account forbids on the D1 .3 element. Since the pulse duration at the counter's outlet is equal to one clock, we have a thrown output of the trigger into two clocks. And with the next positive front, you set the yield of the trigger per unit, thereby allowing the account at the output D1 .3. Next, the signal enters the transistor, and a non-polar signal is formed with a score of 58 pulses of 2 skipping.

The scheme is checked in January 5.1 .1. The number of revolutions imitated by a circuit from 240 to 10,200 rpm. At the same time without errors on the crankshaft sensor.
Recommendation: Frequency Adjustment Resistor It is desirable to put a logarithmic one, the K564 Ye15 counter can be replaced by two counter K561 YE8 slightly by steering the circuit.

Program MH Tester for Bosch M1 .5 .4 .4
© Mobil (Yury)

The program is designed to test the ignition modules. The program is sewn into the ROM, the ROM is mounted at the time of testing in the ECU to the place standard. On the high voltage wires Installed grounded arresters. Do not forget to abide care when working with high voltage! After turning on the ignition, the CE light begins to flash, when you press the gas pedal, the computer begins to form control signals to the ignition module with a duration of 2 .8 ms, the spark will appear on the arresters. The frequency of sparking depends on the degree of pressing the gas pedal, the stronger the pedal is pressed the higher the frequency. During the sparking, the CE light burns constantly.

The frequency of sparking translated into the engine turnover approximately can be estimated by the tachometer. If you release the gas pedal, the formation of control signals to the MH stops, and the CE light bulb will flash. This program allows you to evaluate the performance of the ignition module without removing it from the car, as well as testing
right on the car allows you to check high-voltage wires, wiring to the MH and the outputs of the ECU forming control signals.

The program has written and checked on the BOSCH M1 ECU .5 .4 2111 8 V 1411020, but as far as I understand it will work on the 70 block. I would like to check the program on 40 and 60 blocks. Impressions, suggestions and comments are accepted at [Email Protected] or in the conference. Download program .

The program can be sewn not only in 27 C512, but also in 27 C64, 27 C128 and 27 C256, after programming it is necessary to bend 1 and 27 legs (so that they are not inserted into the panel) and connect them with 28 legs for 27 C64, 27 C128, For 27 C256 you need to bend 1 leg and
connect it from 28.

Tester for speed sensor chain (DS)
© Oleg Bratkov

One way to check the health of the speed sensor and its electrical circuits is to use the speed sensor emulator. You can of course connect another, control DS, and turns his shaft, ask for an assistant or driver to post behind the arrow on the instrument panel - is it twirled? Well, there are still options ...

The emulator is the generator on the Timer "555", the domestic analog of K1006 Vi1. There are many different schemes for an accelerated winding of the odometer readings, and almost all of them can be adapted for this. However, the output of this DC is an "open collector", therefore, for proper coordination with the DS circuits, a small or medium power transistor is used, almost any. It is desirable to use protection for nutrition, a resistor on 10 ... 50 ohms and a diode sequentially, and then a protective diode or varistor. Instead of the transistor, it is also desirable to put a modern electronic key.

Good defense will provide a long life of the device. The generation frequency is determined by the capacitor C *, resistors R * and a resistor of 2 kΩ, included between 7 with the output and power wire, and should be 166 .666 (6) Hertz for 100 km / h, or with a period of 6 millisecond pulses. For greater stability, the capacitor C * should not be ceramic or electrolytic. It is better to use C73 series capacitors. In a particular case, this frequency turned out to be indicated on the diagram of the rates of radio components and C * \u003d 1 μF, R * \u003d 2 .7 com. It is necessary to take into account the variation of the parameters of radio components 🙂 put a trimming resistor, set the frequency and replace it with a permanent one. With a smaller container with * and a smaller resistance R * frequency above. Then covered with varnish and pour in the "chimmetal" or a resin, one with a connector. It turns out a chip for checking DS 🙂

Well, the check itself: complaints about a non-working speedometer, the error in the ECU "is faulty speed sensor". Remove the connector with DS, we turn on the emulator in it. The LED on the emulator caught fire - there is food. The speedometer arrow deviated, the computer (through the diagnostic line) shows the known speed. Not necessarily 100 km / h, and how much will it work in the manufacture of the device. The output is defective or DS itself, or its drive.

Check RHX

RHX has two electromagnetic windings that are not interconnected. One winding is the needle move forward, the other is respectively backwards. Moving the needle to one step occurs at the time of feeding the power, the next movement step is to supply the power in the reverse polarity to the same winding.

Pressing and release of the S2 button leads to the movement of the needle, the position of the switch S1 sets the movement direction. I suspect that an anchor principle is used in the RCH mechanism. © Oleg Kravchuk Aka OL-102 IL

Another, more perfect and advanced tester suggested E. Gorbatko (Aka Mster2002, [Email Protected]). This small freeware program allows you to control the idling regulator, changing the speed and direction of movement, connecting it through a small circuit (the connection scheme is attached, you will need a chip, you can get from the GM VAZ block) to the LPT port of any personal computer computer.

And finally, the RXX Tester from Almi

The tester is designed to verify the health of the idle regulator with walking engine (hereinafter - RXX), installed on VAZ cars.

Logic work:

one . When the power is turned on, the PXX initialization occurs, for this, 255 steps are performed towards the stem hitch, then 70 steps towards spreading. This logic is back to normal operation of the RXX in the composition of the throttle pipe, since the rod extension by 255 steps is unacceptable if the RCH is removed from the DP (the rod can exit the engagement and jump together with the spring).
2. After initialization, the device is ready for operation. Pressing the "Slot" buttons and "Plug" leads to the appropriate actions. When extending the rod, be careful, it can get out of the engagement and jump together with the spring!
3. Continuous test. If you press both buttons at the same time and smooth them for more than 3 seconds, the device will start periodic shore and spreading the rod by 255 steps. To stop the test, press any button.
four . Using the potentiometer, adjustment of the speed of movement of the RCH rod is possible.

Explanation of the scheme:

one . The 5 volt LM7805 stabilizer can be replaced by any other, including in the TO-92 housing (78 L05), since the current consumed by the microcontroller is very small.
2. The capacitor in the 2-leg chain of the ATTINY12 is better to use a film type, since ceramic capacitors of such a container have a significant TKE (the container is highly dependent on temperature).
3. The RXX driver can use TLE4728 G or TLE 4729 G. Depending on the driver type, use the appropriate type of control program! The TLE4728 G driver can be taken from the defective Bosch MP7 ECU .0, the TLE4729 G driver is from ECU January-5.
four . ATTINY12 L microcontroller must be programmed (flashing) before installing into the circuit.

Firmware and description inside the archive.DOWNLOAD

Acoustic Tester DPDZ

To check the DPDZ, the simplest adaptation from Uvarov Sergey (Aka Zerg) for express - verification of a hearing sensor. A simple, but a very effective device working on the principle of the "old brown radio receiver". Scheme and description.

A fitting for a pressure gauge for checking the fuel pressure in the ramp.

By numerous requests, we place the drawing of the fitting for connecting the pressure gauge to the ramp. The drawing is made and kindly provided by Hass & Dodgev. For compaction, any suitable rubber tube is using an outer diameter 8 and 6 mm long. The drawing that you need to print and attribute to the current. If the turner starts suddenly you rub, that such a thread does not happen, feel free to turn around and go to another turn. In the end - ends there is a special, which will make you a fitting.

Connector connector diagnostic equipment To cars VAZ.

To connect the diagnostic equipment to the block, you can use the pin contact of the corresponding diameter, but it is much more convenient to make a specialized connector. This design was developed by NPP NTS to connect its diagnostic equipment. In a few modified form, these connectors can be found on the car markets tolyatti.

Disassembling 55-Contact EU Connector.

First we need to consider on the photo on the left - the design of the terminal, and it is intricate, reinforced with enough elastic flat springs from two sides, so it's easy to pull the wire or hide one of the springs is useless, every attempt to squeeze one of them (for example, seer), leads to that another spring is even stronger in the landing socket.

To facilitate the disassembly and prey to terminals with wires, the connector should be disassembled, i.e. Not only to remove the protective casing, but also to separate the upper half from the bottom. At the same time, the side holders on which the number of terminals are written. Nothing wrong with that. At the end of the procedure, both halves of the connector and side holders firmly glued together with ordinary Japanese-Chinese super-glue (for 2 -3 rubles.). Then consider photos of finished tongs, it can be seen that the design is primitive. The task of these tongs to compress both springs in the nest together. Therefore, their sizes are adjusted under the board socket.

It is made by this "miracle of nature" from the submitted material. I got a steel wire with a diameter of 3 mm. A common nail will go. Wire cut into three pieces of 2, 5 cm long, 5 cm and twist something, or we solder, or weld, or glue, etc. In general, we connect firmly. The photo presents the option twisted with copper wire and the spa-suited with orthophosphoric acid. The next step: grinding. It will take flat feet and vice - fitting sizes. Finally, insert the forceps into the connector, pressing with a little effort, click and ... after 3 -5 minutes you have 20 -30 wires with terminals. Take out all the wires. They are inserted later into the glued connector very easily.