P06e900 mercedes. 2001 C240 no start / code P0600 help. P06e900 mercedes

 
 2001 C240 no start / code P0600 helpP06e900 mercedes  I found a short in the engine wiring harness which i fixed

332 views. When the car is started, the fan runs constantly at full. Aide sur Mercedes vaneo. It went to limp mode. Would suggest that once you have written down the codes clear them and see what comes back. This is a very. Records show some movement in 2013-2015. and even disconnected the batt for a day to try and reset the car. 0T made it to my work bay. Be the first to answer Feb 06, 2016 • 1995 Mercedes-Benz C-Class. Getting these 3 codes off of 2006 Mercedes, S350 P0720, Getting these 3 codes off of 2006 Mercedes, S350 P0720, P0600 and C1000, Egiine light on along with ABS and EPS lights. read more2001 c240 mercedes (100K miles). 150,000 MILES. Factory Mercedes-Benz Technician. It has 82000 miles and I am the original owner. Vérifiez les symptômes associés au problème et recherchez des solutions pour le résoudre. 20 feet, driving at a constant speed, turn the steering wheel. Look through each instruction set you have, do a mock uninstall and reinstall checking all steps to make sure you didnt miss anything. No idea how it happened, but I got the car back today and after further diagnostics the mechanic found that my “Main Fuse Starter / Alternator - 150 amp, Ford # CV6Z-1526-A” had blown. B. ESP abs light is on dash Had this put on Diag. 70-P-070763 P0720 is a trans code and is separate from the serial link communication failure. U0415 Buick Invalid Data Received From Electronic Brake Control Module. The car runs OK, only front cooling fan runs at the full speed all the time (when engine running) I can delate the fault code, but the fault comes back as soon the engine starts. The specific diagnosis time and labor rates at auto repair shops can. Ive also attached a pdf of the full list to this first post. P0600 Serial communication Link Malfunction. i have to use a flat head in the shift lock to get it out of park then it makes a clunk when it goes in gear/engine is not running smooth as it should. 22V152000. Mercedes-Benz 300E. 16394 P0010 Series 1: failure of the regulator valve timing. The only actual repair/maintenance you get for that price is an oil change (with Mobil1 and the MB filter, which are CRITICAL, ~$120 on its own) and tire rotation. Mercedes-Benz combines luxury with performance across the full line of models including luxury sedans, SUVs, coupes, roadsters,. Fuse panel mercedes c240 fuse box diagram : mercedes c class w203 (2000. Mercedes C230 Kompressor 2004 - P0128 CEL. 2006 Mercedes R 500 got the code p2037-4 (no or incorrect. 1:48 Insight into pro. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? There are a few things that have to be checked. Replaced charcoal canister. P0121. 2003 MB e500 sport cranked car this morning then turned it off quickly because i wanted to check the oil level by the computer on dash. It was so bad and dark on the streets that I could not see very much at all, I was just following the car in front me and using. Most auto repair shops charge between $75 and $150 per hour. 0 hour of labor. Airbags and belt tensioners exchanged. The worst complaints are electrical, AC / heater, and. Si votre voiture est touchée par le code P0600, assurez-vous que le diagnostic a été effectué correctement et que l'erreur est toujours pertinente. Descripción y causas del código de avería P06E9. Disabled ABS, traction control, and cruise control systems. NCJETSKIER Discussion starter. . (P0135) The code means that there is a problem with the heater element circuit of the heated oxygen sensor. #1. Hi,I have a problem with my car Mercedes C350e plug in hybrid when drive like electric is perfect just in moment when change to petrol engine showing fault on cluster and them is no chance back again. These tools can detect problems with different components of the car’s electrical system, such as. We use cookies to give you the best possible experience on our website. Volkswagen Group of America, Inc. Established for 20 years all vehicles washed and vacuumed. Can read and erase all fault codes on Mercedes-Benz cars. read more. Changing the game since 1886. the car is still stuck in limp mode. I get in the car put the key turns over But the starter dont roll the motor over. read more. a) both battery terminals. "Learn how to replace the starter in a 2011+ generation Ford F150 Ecoboost and naturally aspirated v6. read moreWhere is the fuel pump located on a 1994 Mercedes Benz c220. Mercedes 2003 e320 Problem started with it going into limp home Won't change gear sometimes stuck at P. Ive recently stage 1'd my mk7 gti and for a week it was fine aside from some clutch sclip in higher gears which ive now bought the sachs organic clutch to replace in the coming week. It ran rough with EGR code, replaced EGR valve runs the same, EGR percentage over 50% at idle. B. . Please see terms for details. My Cobb accessport reads the code as P06E9 (Engine Starter Performance). This can be done by using diagnostic tools specifically designed for troubleshooting serial communication link malfunctions. Labor: 1. P0103 Mass or Volume Air Flow Circuit High Input. 0) and the Foxwell n510 Elite. After reading the forum, I replaced the brake light switch and. Read more about the upgraded, base-engine Jetta and see pictures at Car and Driver. Contact Solo Auto Electronics via our webform or call us at 888-848-0144. Replaced the switch. Mercedes Benz, Smart. 76 posts · Joined 2006. Full test with performance data of the 2016 Volkswagen Jetta with the new 1. Mercedes Mechanic:. Most auto repair shops charge between $75 and $150 per hour. I would suspect the vacuum actuator on the turbo has a split diagram, a very common fault and there is a repair kit but accurate calibration is tricky. The list of automotive Makes at the right edge of the screen. I have taken it a local garage (not a dealership) and they have plugged it in and there are 3 fault codes: C157200 (The correction time when filling is too long) C156782 (The Left front vehicle level is out of the permissible range. This can be performed one of three ways. Can not read speedometer, temp and fuel gauges. Professional technicians on Identifix have encountered the P0600 code in a variety of vehicles, including some from Mercedes-Benz. 2V. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. ME2-SF1 – Motor electronics. MERCEDES BENZ SPRINTER LWB Auto or Manual 513CDI W906 02/2010~09/2018 2 Door Cab Chassis RWD DIESEL 2. When you experience a P0600 and P0601 fault you will need a garage with all the latest vehicle technology to service and repair the fault. Following the troubleshooting chart resistance was way out of specs. Put a new cooling assembly in and that didn't work, there are 4 wires going to the cooling fan, 2 ea 12 volt red and brown wires, black and white ha. by HB540i » Fri Nov 20, 2015 12:18 am. P229f28 - Nox sensor2 cylinder bank 1 has malfunction. 2006 CLS500. • Data Parameters, on page 21 defines Mercedes-Benz data parameters and explains how they display on the screen. Once you are sure everything hooked back up, if it doesnt start then, you can begin looking at software issues. An. the codes a. Quick Tip If you need to get home, try turning off the car. Hi,I have a problem with my car Mercedes C350e plug in hybrid when drive like electric is perfect just in moment when change to petrol engine showing fault on cluster and them is no chance back again to electric drive till I stop car and start engine again them start in electric like must be. rudeney · #2 · Jan 26, 2015. Driven by Fast-Track ® Intelligent Diagnostics, the ZEUS+™ provides you with the information you need to diagnose, repair and manage any issue – simplifying your workflow and increasing your efficiency on every job. 9 08-04-2020, 12:11 AM. the car is still stuck in limp mode. "6" in the third character position in a DTC indicates that the computer and auxiliary outputs is experiencing a malfunction. 3L, t, the scan tool and other modules could not communicate with the transmission. Reparaturinformationen für den Mercedes-Benz-Code P0600. Mercedes Technician. 38 % of the time it's the. Every once in awhile the car will show every warning light available in the dashboard, then will go into limp mode. ESP abs light is on dash Had this put on Diag. P0121. B1000. P203E “No CAN message from instrument cluster or message fault”. If none of that helps, then I think the next step would be to replace the cluster. Activation of the check engine light. The car runs OK, only front cooling fan runs at the full speed all the time (when engine running) I can delate the fault code, but the fault comes back as soon the engine starts. 2017 Volkswagen Jetta Others TSB Details. very easy job (twist, remove, unplug - plug in-slot in-twist. 3L 2010, l’outil d’analyse et les autres modules ne pouvaient pas communiquer avec la transmission. P0560 and P0600 on Mercedes benz A190. If you own or are considering a Mercedes Benz C350E there are a few common problems that you should be aware of. The cost to diagnose the P0600 Mercedes-Benz code is 1. p0600-008 fault in CAN line transmission. and wont shift higher than first gear. Unfortunately, some of that wiring can wear down over time and your car’s ECM might not react as quickly. Self adaptation of fuel mixture "partial load" (Inline 6, Inline 4 (Right cylinder bank for V6) at limit from engine control module. The iconic brand "Mercedes-Benz" which is known to amplify the palette of the automotive industry sounds opulent and reliable with its new plug-in hybrid GLC 350e which garners grand attention with its array of features and unique styling. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. 0 hour of labor. Some transmissions will include an intermediate shaft speed sensor, but all electronically. AR82. 2001 C240 no start / code P0600 help. Throttle/Petal Position Sensor/Switch A Circuit Malfunction. Hi, Malcolm Sutherland - only check I had done was a diagnostic report showing ( I think) P06E900 and P052E71 I’d rather do this via chat please. Diagnostic trouble code (dtc) P06E9 may also be set in the powertrain control. He said there was a leak and the valve gasket cover needed to be replaced. Mercedes Mechanic: Marty, Mercedes Technician replied 8 years ago Hi Edgar, the connector is located at the right front corner of the transmission. Wadliwy moduł sterujący silnika (ECM) Wiązka przewodów modułu sterującego silnika (ECM) jest otwarta lub zwarta. See if fuel sprays out. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. So on Feb 24th I installed the Unitronic stage 1 ECU with Stage 2 TCU tunes and it has been fine until today (day 5 of tune) when I was leaving for work. Be careful. Keep in mind that this cost is just for diagnosis; actual repair costs may be higher. I have Mercedes benz A190,sometimes when I off the ignition and attempt to restart it doesn't come and after like about an hour it always come up on restart. Code: P06E9. So we proceeded to check the codes and confirmed that the code P06E900 had returned. One common problem for the OM617 diesel engine, which is used in the 1975-1985 models, is the timing chain. Mercedes Mechanic: Marty, Mercedes Technician replied 8 years ago Hi Edgar, the connector is located at the right front corner of the transmission. My 2004 C230 won't start. Therefore, once we got the Mercedes back to the garage, we then scanned the vehicle for fault codes. P0600 bedeutet, dass die ECU die Verbindung zu einem ihrer zahlreichen Controller mehr als einmal unterbrochen hat. Got a 2004 Mercedes S430 with 56k original miles. p06e900 - engine starter performance. Once that signal is being received from ME ( Engine control Module) The ME then Energizes the. approx. Tel: 020 8863 9233. Thanks Given: 49 Thanks Received: 987 (336 Posts) Posts: 1,308 Threads: 89 Joined: Apr 2013 1 03-21-2019, 05:49 PM . 3. A lots of sweat, tears and $$$ in it. SOURCE: i need the mercedes benz 1999 clk 430 radio code. This means the ECU (one of which is located behind the passenger side floor mat toward the firewall) has lost communication with one other or more module (s), possibly through a short, disconnected wire or harness, or pushed-back pin. ABS control module N47-5. 0 hour of labor. P0107. ). Replacing the Crankshaft Position Sensor with code P0335 and P2034-8 & the connector on a Mercedes car. 0TDi. A1 Diagnostics have all the technology needed to ensure your Mercedes vehicle is serviced reliably at the most affordable prices. U0415 Chevrolet Invalid Data Received From Electronic Brake Control Module. Just look for ones advertised as reading "all systems" and for Mercedes-Benz. 2006 W219 CLS500 ABS ESP Limp Mode. Need more help with a P060A code? If you still need help regarding the P060A trouble code, please post your question in our FREE car repair. The code simply indicates that there is malfunction between the connection of electronic control module (ECM) and one or more of the submodules. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. the generic serial interface code doesnt really tell us much. Lokalizacja usterki. All fixes of this fault code should also be posted for further help. " Give your other problems, I suspect this is. All - Answered by a verified Mercedes Mechanic. Furthermore we proceed and. (3 to 15 mph). C350e. P2312 “One or more messages from the engine control unit are not on the CAN bus”. How to fix P0600 code include: Replacing the entire engine control unit, which is the worst possible scenario if your car’s ECU has failed to function completely. Hear a click. These effects are programmed by Mercedes, and frankly, I am amazed no one has sued them for putting people at real risk under certain circumstances. When a Mercedes Benz car starts experiencing serial communication link issues, the first step is to diagnose the problem. P0600 Dodge Powertrain Control Module Fault. Maybe it's the beginning of the infamous wiring. It takes like 30 seconds to install it. On my last trip of approx. Cause: The PCM sets this DTC when no engine rotation is detected during a crank event. P229F62 Signal. We purchased a new GLC350e last summer and have had chronic cooling issues ever since. By using any of these maintenance routines, you can avoid getting the code P0600 in your car or at least prevent it from coming back in case you encountered it already. part 2 . We're going to replace the starter after hitting it more with the hammer and. Throttle/Petal Position Sensor/Switch A Circuit Range/Performance Problem. Mercedes C230 Kompressor 2004 - P0128 CEL. Unfortunately, diagnosis absolutely REQUIRES the use of a Mercedes STAR diagnostic scan tool as it is the only one that can communicate with each and every control module on a Mercedes. Event P2037-4 ME-SFi 2. 6V would be the bare minimum and 14. R/R left side body under panel. Vehicle: 2001 Mercedes Benz C240 mercedes-benz; c240; p0600; 2 Answers +1 vote . When the car is started, the fan runs constantly at full speed, pre-safe inoperative comes on, Cruise Control inoperative, ABS light is on. . I reset the code and then start the car but same issue. This is mentioned from time to time in benzworld forums however no one seems to be able to give a clear explanation of what this problem actually is . key off, wait minute or so, starts and runs perfect for 10 50 miles. 17K views 1 year ago #c350e. I am new to the forum and a new and proud BMW owner as my first car. P0600 significa que a ECU perdeu a conexão com um dos seus vários controladores mais de uma vez. P0467 Purge Flow Sensor Circuit Low Input. scan eng computer have codes p1605,p500,p600,p1747. (08-07-2017, 12:42 PM)grmsek. 0 hour of labor. Make: MERCEDES-BENZ Description: P0600 MERCEDES-BENZ Loss of Serial Communication Link Possible causes: – Faulty Engine control Module (ECM) – Engine control Module(ECM) harness is open or shorted – Engine control Module (ECM) cicuit poor electricl connection – Low battery voltage Solutions: – Carry out a Reset via CarDiagRotating Speed Sensor of ESP (B45): Drive the vehicle in a forward direction at a speed between 5 to 25 km/h. Have him read the codes (if any) in the used module. P0400 Exhaust Gas Recirculation Flow Malfunction P0401 Exhaust Gas Recirculation Flow Insufficient Detected P0402 Exhaust Gas Recirculation Flow Excessive DetectedJan 18, 2012. Mercedes-Benz C350e – Spring 2016; Pricing TBA; Standard Feature Highlights. I am sure nobody buys them thinking 135mpg is anywhere realistic. We’ve had the car in for service 7 (!) times now and they’ve not. 2017 XLT 300a 3. The instrument cluster is functional with the exception of the the speedometer. danieleik, I was wondering if you ever solved your problem. 2CDI. It’s the. Vehicle: 2006 Mercedes Benz CLK 500 Convertible p0600; mercedes-benz; clk; 2 Answers +1 vote . C230. Once that signal is being received from ME ( Engine control Module) The ME then Energizes the starter. (In march mercedes warranty was end)Mercedes C350E - issues with 12V Battery Module and switching to E-mode Thread starter MCINERJ; Start date Sep 15, 2020; Page may contain affiliate links. P0146 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3) P0313 Misfire detected with low fuel. upon attempting to restart engine it started but the engine fan ran at high speed compute stated serial link comm failure and coolant level. The currently selected ODB-ii codes is for the Mercedes-Benz makes. 10 min. Ολοκληρωμένη υποστήριξη με ένα απλό τηλεφώνημα σας, στο +30 211 211 15 56 για την Mercedes-Benz και +30 211 181 38 49 για smart, η κεντρική υπηρεσία επαγρύπνησης Service 24h της Mercedes-Benz θα προβεί σε όλες τις απαραίτητες. A quick scan at the autoparts store showed code P0600. 55,441 satisfied customers. 2 TechnicalInformation Paintcontaminationongroundscrews Faulttype–groundstrapandgroundscrews Dec15,2021 Page2of 4 AfterSales 2760 ENU Service 174/21Remember, if your Mercedes has a fault code P0600, it is recommended that you visit a workshop as soon as possible to solve it, since driving with mechanical problems in the car can cause traffic accidents. fixedfollow me on twitter A Camshaft Profile Control Stuck On. P0121. What Does the Engine Code P06E9 Mean? Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "0" in the second position means that this is a generic OBD-II (OBD2) DTC. Browse pictures and detailed information about the great selection of new Mercedes-Benz cars, convertibles and SUVs in the Three Point Motors online inventory. Fault Code Meaning. After switching on the ignition and the radio, the. A P0600 code indicates that there are communication issues within your car’s ECM. #1 · Jan 5, 2016 (Edited) A couple of weeks ago, I suddenly started seeing the "Collision Prevention Assist Plus inoperable" message show up on the display screen every time I turned on the car. 2005 Mercedes E-Class E320 3. Performed smoke test of evap system to check for leaks: no leaks found at this time. The P0720 signals one of the common problems of an otherwise bulletproof transmission. #2. P0600. I've recently acquired a 2005 SLK 55 AMG in great condition with about 64000 km. deze groep is bedoeld voor alle vragen in verband met mercedes w205. P0600 Chrysler Powertrain Control Module Fault. After reading the forum, I replaced the brake light switch and the problem. P0600 MERCEDES-BENZ Possible Symptoms Engine Light ON (or Service Engine Soon Warning Light) P0600 MERCEDES-BENZ Possible Causes Faulty Engine control Module (ECM),Engine control Module(ECM) harness is open or shorted,Engine control Module (ECM) cicuit poor electricl connection,Low battery voltage P0600. 99 3-day shipping. It is not unusual for fluid to leak out of the transmission and travel through the connector and up the wiring harness and enter the transmission control module. . #1. Once one of these codes can be pulled, then we could go further into diagnosing the problem. Hi please I'm have a warning sign of dash mercedes cla 2015 coolant stop engine,. Your Mercedes. - Rodney. Windows and indicators do not work. Nov 4, 2023 #5 Check the system voltage with the engine running. mercedes benz code p0600 2001 mercedes clk 320 sport coupe - 3700 trades longisland accessories wont wake up. 0V usually indicates a faulty Y-Cable and/or engine to chassis ground strap. #4. Labor: 1. May 16, 2019. 12 posts • Page 1 of 1. Mercedes CLK 430 P0705 & P0600 Alternative Car Repair Fixes Down BelowPlease Check Out and Subscribe To My YouTube PartnersYoutuber does Computer build. The brake light switch is also a common problem in this model too. #1 · Sep 17, 2007. Mercedes Fault Code. B273513 The squib for the on-board voltage pyro fuse has a malfunction. i have to use a flat head in the shift lock to get it out of park then it makes a clunk when it goes in gear/engine is not running smooth as it should. Hi , Got same "malfunction" message on my mercedes c350e year 2016, driving in electric is perfect but as soon as it shift to the IC engine the message pop up. 8 Motor electronics no or incorrect CAN message from control unit N1 5/3 (ETC [EGS]) Event 4A42 Fault in CAN communication control unit CGW event 54f0. 0) and the Foxwell n510 Elite. To diagnose the P0705 Mercedes-Benz code, it typically requires 1. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Full Forum Listing. This is the best way to remove it without working in. The video focuses on the basic Mercedes-Benz specific diagnostic error code. Marty. . It shows P2600 circuit 87 voltage low. The car has about 100K on it. Cause: The PCM sets this DTC when no engine rotation is detected during a crank event. Event 2350 Y3/8N4 (VGS) transmission control unit defective. I think I havea similar issues as I describe below. This information is used by the Electronic Control Module() to control ignition and fuel injection. P2204 Y3/6N2 speed implausible. MB specialist has also checked and its possibly going to be a long hunt to locate the issue so I am stripping out the trim to access the main wiring and carry. Trying to pass my father 1997 E320 to my son as his first car. 3. I was wondering if you could give some operating experience based on your issue. The P0607 Mercedes code will illuminate the MIL (Malfunction Indicator Lamp). ForScan shows PCM starter fault code: P06E9:00-2F. 0. Contents:0:21 Basic DTC analysis according to OBD2 protocol standard. P0466 Purge Flow Sensor Circuit Range/Performance. HOW TO FIX MERCEDES TRANSMISSION THAT DOES NOT SHIFT LIMP MODE Check Out Our Website: guys, if you have a Mercedes Vehicle i. 0 hour of labor. The most common fix for a P0606 code is to replace the PCM, although in some cases re-flashing the PCM with updated software could possibly fix this. Now the car starts up fine and runs fine but it is still in limp mode. . (02-22-2021, 10:38 AM) ytech Wrote: I’m sorry but this is laughable, the issue is clearly in the car and swapping ecu ain’t gonna fix it. fyi: i used my obd2 uni scanner to get the codes. . About Press Copyright Contact us Creators Press Copyright Contact us CreatorsRemedy: Fault code P06DA00 can be ignored unless otherwise specified in the guided test. Once I pulled over and restarted the car it drove normally and I took it to the Mercedes Dealer. 2003 Mercedes Benz C230 maufuction code serial cummunicatio. Trouble Codes. P06E9 Engine Trouble Code. Both the parts are inexpensive and can be easily replaced by yourself. Also yesterday check engine and RED Battery Visit workshop Light came on. and even disconnected the batt for a day to try and reset the car. The Diagnosis gave a P0600 Serial Communication Link Malfunction. Be careful. History: I bought this car 4 months ago with 67,000ish miles on it,and it seemed fine. BenzWorld. ominimicu Location Offline Senior Member Reputation: 371. . I read the codes with my Cobb AP and the P06E9 Engine Starter Performance code shows up and car turns on but won’t start or crank. Hi 1995 mercedes s350 diesel. Most auto repair shops charge between $75 and $150 per hour. Communication fault / See also CAN status in freeze frame data. a160 limp home mode exactly where is the k-40 relay located esp malfunction on 2002 c class transmission for ml320 c230 kompressor 2003 Ask an expert; Add address to our search engine. 2s) heavy car and the 40+ mpg reflects this. P0040 is a diagnostic trouble code (DTC) for "O2 Sensor Signals Swapped Sensor 1". Hi , Got same "malfunction" message on my mercedes c350e year 2016, driving in electric is perfect but as soon as it shift to the IC engine the message pop up. E300 HYBRID. #1 · Dec 22, 2013 (Edited) 2003 ML320 Engine Codes P0600 and P0705 ( P2313 Transmission Code Too) Questions are underlined. It indicates that there’s been a communications failure between the ECM and one or more of the separate modules that it communicates with. HRA Headlamp range adjustment: Supply voltage of the control unit is too low (undervoltage) B1004. Wenn dieser Code gesetzt ist, löst die ECU aus, dass das Check Engine Light im Dashboard angezeigt wird und ein Failsafe-Modus aktiviert wird. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Hi I'm new here and done alot of reading to try and find out whats wrong with this car but I'm lost. #1. While stopped at a red light I switched off the ignition and restarted. 1:48 Insight. Shutting off the engine clears some symptoms but they soon return. P0600 is a relatively uncommon OBD2 trouble code. Definition: Engine Starter Performance. A few members have said -ecu/maf fried but i am not so sure . Support Us On PATREON: U. Re: P0600 and P0702 2002 Mercedes C320. answered Jul 8, 2016 by Reynaldo (12. R/R left side body under panel. Got the problem with MB W168, 170 cdi, year 2000 with fault code P0600 CAN. The 2019 Mercedes-Benz GLC-Class is a compact luxury SUV that can seat up to five people. Regarding code, P06E900 starter has been replaced. P0600 – Utrata łącza komunikacji szeregowej.