The increase in sensors and ECU’s built the foundation for the next generation of vehicles. All these new sensors make vehicle diagnosis and repair more complicated than ever. So here our Snap-on's tips for streamlining the diagnostic process
Actuators on modern vehicles can be difficult to diagnose, with many technicians resorting to replacement rather than diagnosing the component correctly. However by using a methodical fault finding process we can quickly and accurately diagnose these components. Here's how...
Motor vehicles have become increasingly more complex over the last two decades to meet ever-tightening emissions regulations, increased fuel economy requirements as well as passenger comfort and safety. This added complexity means technicians are flooded with additional data when diagnosing vehicle faults.
A driver brought his vehicle – a 2008 Volkswagen Golf 1.9L – to be checked out as the front driver’s side door would not open. Take a look to see how this was solved using a Snap-on diagnostics lab scope.
This Toyota Prius had malfunction warning lights illuminated and two faults relating to the High Voltage System stored.Intermittently the vehicle would not enter “Ready Mode”. See how this Prius was put back into ‘Ready’ mode…
The control of the spark ignition system on early 16 valve Renault engines is unique to other system designs currently available. The system utilises direct ignition coils (often referred to as pencil coils). Let's take a deeper dive into Renault Coil Control Circuits...
The purchase of a new vehicle (old or new) is always exciting. Sometimes though, when purchasing second-hand, you can take on some faults that you may not be aware of.
This customer had purchased himself a 2010 Ford Focus ST, and after a few weeks, experienced some symptoms...
A 2003 Honda Accord 2.0L petrol with engine code K20A6 had the engine management light illuminated and a fault code stored: EGR – Insufficient flow detected. Here's how to test an EGR valve.
Read on to learn how a Snap-on car diagnostic tool gives a simple way for you to monitor vehicle data when you are carrying out a road test as part of a repair.
This 2008 Vauxhall Vectra C had a bulb failure warning light illuminated on the instrument cluster and the brake light on the right-hand side of the vehicle appeared to be lighting at full brilliance at all times.
A symbol appears in both zeros of the one hundred. The first zero has a hexagonal centre to symbolise a socket, this is a link to the origins of the company and the “Game Changer” that is the interchangeable socket.
Take a look at our 10 minute 48 Volt Electrical System Class here!
Electronic throttle control has now become a standard fitment in all spark ignition engines. This has allowed for advances in technology such as cruise control, traction control, limited operating strategy (limp home mode) and engine speed limiter.
Take the challenges out of diagnosing modern air/fuel ratio sensors by using this handy process in Snap-on scan tools with up-to-date diagnostic software.
Read on to find out how this simple procedure within Snap-on's diagnostic platforms is a great starting point for your diagnostic process.
See what information a technician was able to gather via Intelligent Diagnostics from Snap-on in order to get to the bottom of some persistent warning lights.
A 2008 Audi A6 2.0L PD compression ignition engine with engine code BRD had an intermittent no-start condition when the engine was up to operating temperature.
Find out how Snap-on diagnostic platforms helped overcome the winter weather when dealing with an Audi TT that kept stalling in the rain.
Local Interconnection (LIN) Bus is a low-speed cost-effective alternative to CAN bus. In this article, we introduce how LIN bus communication works.
Controller Area Network (CAN) is a data transfer network designed to allow many nodes (modules) to communicate using a standard structure and format. This article will provide the technician with the necessary tools to successfully validate a CAN bus signal and help to identify faults where present.
FlexRay is similar to CAN Bus as the data is transmitted over two twisted wires, which act to reduce the effects of external interference on the differential voltage between both wires. Data transfer speeds can be up to 10 times faster than CAN bus, operating at speeds up to 1 Mbits per second.
The vehicle is a 2003 Fiat Punto 1.2L petrol with engine code 188.A4.000. It had the engine management light illuminated and was misfiring on two cylinders.
ADAS systems come in many forms, with everything from blind spot warnings to night vision technologies, and because of the vital job these systems do, it's important to ensure that they are properly calibrated and functioning to prevent any malfunction of the system.
Learn how the car diagnostic tool software from Snap-on can help you quickly and easily reset and re-calibrate sensors when completing a vehicle repair.
See how a Snap-on car diagnostic tool can help you diagnose communication problems on a vehicle in a clear and straightforward fashion.
A 2008 BMW E90 with a 2.0L spark ignition engine has been suffering from occasional rough running when starting and the engine management light is illuminating.
See how working on ADAS systems is made easier with the innovative and unique combination of garage equipment and vehicle diagnostics from Snap-on.
Take a look at some important steps you need to know when it comes to diagnosing car air conditioning issues, with the help of a Snap-on diagnostic expert.
Learn about a quick and easy way to test a vehicle's communication network and get to the bottom of no-communication problems efficiently.
A 2005 Fiat Multipla had been to an independent repairer because the malfunction indicator lamp was on and it was running on limp mode.
The diesel particulate filter is designed to trap and store Particulate Material (soot) that is produced by the diesel engine during normal driving.
Make your life easier by using a Snap-on lab scope and scan tool to check and verify the correctness of vehicle scan data - on the same screen at the same time.
A certain amount of caution is necessary when attempting to start vehicles which have a discharged battery.
Read on to see how you can check data and test that the electronic throttle control system is performing normally – and how you can tell if there is an issue.
This article describes to technicians how a relatively simple fault became slightly more complicated to rectify when a component with different operating parameters was fitted. Damien Coleman will guide you through how to resolve the issue quickly and effectively by further investigation and testing, using a TRITON-D8 and a multimeter from Snap-on.
Learn about some short but important steps you need to follow when it comes to ensuring that replaced modules are fully recognised by a vehicle.
Modern vehicles can sometimes appear to be complex but troubleshooting most problems can be reduced down to applying simple logic to a specific circuit.
Although voltage testing is valid for circuit and wiring test, monitoring a current flow trace is the most accurate way of testing a component.
Prior to starting a repair, you should research all relevant data relating to the task. An example of this is investigating which special functions and procedures need to be executed after a repair is carried out.
With the implementation of Euro VI emissions standards, manufacturers are fitting additional hardware such as Pressure Sensing Glow-plugs (PSG) to monitor in cylinder pressure to accurately diagnose combustion anomalies.
You should rely on your knowledge of fundamental electrical principles when fault-finding an electronic sub-system.
A 2011 Peugeot 207 with a 1.4l common rail diesel engine wouldn't start. There was no voltage at terminal 50 of the starter motor when the ignition was turned.
Help make diagnosing a misfiring Ford a lot more straightforward with the aid of a quick and simple test available in Snap-on scan tools.
Read how a fault in a Ford Focus's diesel particulate filter sensor was diagnosed, repaired and verified using a diagnostic platform from Snap-on.
Find out about a quick and easy way to help diagnose fuel pump issues by using your Snap-on lab scope and diagnostic software to generate readings for analysis.
The rise in demand for ‘high-tech’ vehicles has challenged engineers to rethink and create more sophisticated internal systems which promote efficiency. The humble motor is a great example of this with many vehicle manufacturers now using brushless direct current (DC) motors in automotive applications. The brushless motor has many advantages when compared to conventional ‘brushed motors’ but whilst more efficient, the commutation control of the brushless motor is more complex. Take a look at the article to learn more.
A 2004 Opel Corsa with a Z10XE engine failed to start and there was no fuel pressure when tested at the fuel rail using a pressure gauge.
The fundamental reason for the engine control module to implement fuel trim control is to meet the requirements of the exhaust gas after-treatment system.
Find out how the exclusive SureTrack system from Snap-on helped provide answers when a Mini with an engine fault arrived at a workshop.
Learn from industry experts at Snap-on about how having a solid diagnostic routine will help you be more efficient each time you face a troublesome vehicle.
Learn some important information and safety tips to be aware of when you are working on the different types of batteries used by hybrid vehicles.
Find out how a simple test with a Snap-on lab scope can help you diagnose ignition problems on a vehicle.
Having a hard time determining if an ignition coil is faulty? A quick test on your Snap-on diagnostic tool lets you compare the voltage and current of a coil.
The development of Advanced Driver Assistance Systems (ADAS) have been a technological leap forward for the automotive industry. However, new challenges handling car repairs for workshops and body shops when ADAS systems are impacted are common.
This deep-dive case study walks through the steps taken when a 2016 Mercedes E350 was involved in a collision and repaired, only to find that a warning message indicating ‘lane keeping assist inoperative’ was displayed in the instrument cluster.
Sensor construction and measuring waveforms is a useful place to start when getting to grips with complex brake system faults. Take a look at the article to learn more.
Read on to find out how this simple procedure within Snap-on's diagnostic platforms is a great starting point for your diagnostic process. Here is how we got to the fix for a flashing DPF light on a Mazda 6.
Discover a new technique included in the latest Snap-on diagnostic software upgrade designed to make your life easier when it comes to coding vehicle headlamps.
Many modern systems, such as common rail diesel injection, can appear to be so complex that they seem to operate by magic.
The polarity of a motor is reversible, allowing for accurate control of the system. One way to control the polarity is by designing an “H-drive” bridge circuit.
Get the information you need in order to be able to check and test a vehicle's timing quickly and easily using Snap-on scan tools and diagnostic software.
Learn more about mutual induction technology and discover some helpful points to consider when working on a fix in your workshop.
Find out how Intelligent Diagnostics from Snap-on helped get to the bottom of a Peugeot 208 with ongoing issues with overheating in this exclusive case study.
Did you know that fuel injectors on Direct Injection vehicles work differently than a standard fuel injector? Read our new Technical Focus article to learn more.
Take a look into some issues you need to be aware of when it comes to dealing with selective catalytic reduction systems, AdBlue and NOx in vehicle emissions.
Take advice from industry experts at Snap-on and work smarter from connection to completion – because time means money and we’d all like more of both.
Read why it's important to make sure all checks are done in order to complete repairs and clear any diagnostic fault codes from a vehicle.
See how a Snap-on lab scope and diagnostic software can help you check voltage and amperage to guide you to a diagnosis when working on a faulty fuel injector.
Sometimes a vehicle will suffer from driveability issues and fault codes relating to valve timing. Such conditions can be difficult to diagnose without the correct equipment.
The purpose of variable valve timing (VVT) is to help increase the engine’s volumetric efficiency and limit the exhaust gasses produced by the vehicle. By altering when the valves open and close you can optimize the performance of the engine.
Not sure how to do a particular test with your lab scope? Did you know there are built-in training classes in a Snap-on lab scope? This article tells you more.
See what was happening on the vehicle you're working on before and after the diagnostic trouble code was set thanks to a handy feature on Snap-on scan tools.
A 2002 Toyota Yaris had been out of use for several months and required assistance to start the engine when it was to be driven again.
This article describes to technicians how a relatively simple fault became slightly more complicated to rectify when a component with different operating parameters was fitted. Damien Coleman will guide you through how to resolve the issue quickly and effectively by further investigation and testing, using a Snap-on diagnostic tool.
See the steps that located, diagnosed and repaired a problem with a Volkswagen Golf's power windows, locks and mirrors.
Learn how to use your Snap-on car diagnostic tool to clear a service light on a VW or Audi vehicle and reset the service schedule.
Read on to improve your knowledge of nitrogen oxides from diesel emissions and how to deal with them.
This Technical Focus article explores the evolution of vehicle diagnostics and ponders how long it will be before every technician needs a diagnostic platform.
Snap-on produces regular technical help articles based on real-world case studies by our team of experts.
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