By Tom Denton
This textbook might help you examine the entire talents you must move point three and four motor vehicle upkeep and service classes from urban and Guilds, IMI and BTEC, and can be excellent for greater point ASE, AUR and different skills. complex automobile Fault prognosis covers the basics of auto platforms and parts and explains the most recent diagnostic concepts hired in powerful car upkeep and service. Diagnostics, or fault discovering, is an important a part of an car technician’s paintings, and as car platforms develop into more and more complicated there's a better want for sturdy diagnostics abilities. for college students new to the topic, this ebook might help to increase those talents, yet also will help skilled technicians in extra enhancing their functionality and maintaining with fresh advancements. In complete color and together with examples of the most recent know-how, this can be the advisor that no scholar enrolled on an car upkeep and service direction may be with out. |
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Additional resources for Advanced Automotive Fault Diagnosis
Likewise the correct operation of the switch, that is, it closes and makes a good connection, would be conf rmed by a very low reading on V1. What is often described as a ‘bad earth’ (when what is meant is a high resistance to earth) could equally be determined by the reading on V3. To further narrow the cause of a volt drop down, simply measure across a smaller area. The voltmeter V4, for example, would only assess the condition of the switch contacts. 5 Testing for short circuits to earth This fault will normally blow a fuse – or burn out the wiring completely.
It can be caused by any component, from the accessory drive belt to the clutch or torque converter, which turns at engine speed when the vehicle is stopped. 5 Noise and vibration while turning – clicking, popping or grinding noises may be due to the following: damaged CV joint; loose front wheel half shaft joint boot clamps; another component contacting the half shaft; worn, damaged or incorrectly installed wheel bearing; damaged powertrain/drivetrain mounts. After a road test, it is often useful to do a similar test on a hoist or lift.
Run the vehicle and conf rm that the fault exists. It could be the temperature gauge, for example. Stage 2 – Is the driver available to give more information? For example, does the engine overheat all the time or just when working hard? Check records, if available, of previous work done to the vehicle. Stage 3 – Consider what you now know. Does this allow you to narrow down what the cause of the fault could be? For example, if the vehicle overheats all the time and it had recently had a new cylinder head gasket f tted, would you be suspicious about this?