Page 43 of Volkswagen Parts by PartsPlace Inc.

brains brains who s got the brains like it or not your vws® are becoming more and more electronic devices the good news is it has allowed engineers to increase performance and efficiency at the same time this feat is accomplished at a time when government emission and safety regulations continue to challenge them the bad news is that the automotive service industry has not kept up with sophistication of the cars because of this many and i mean many mechanics mis-diagnose problems we don t necessarily mean the do-it-yourselfers but many of the nightmares we hear about involve the professionals so you ve got to have a basic understanding of how your car works to be able to evaluate your mechanic standard warning if your mechanic keeps suggesting the replacement of parts and the problem is not being solved he s lost and you re on your own anyway buy a bentley service manual we sell them for all vws® if you desire even more in-depth information we sell bosch technical publications also remember volkswagen® is a huge company worldwide and bosch who makes most of the sophisticated stuff for vw® is huge also they produce extremely reliable vehicles and systems usually electrical component failures are easy to fix but difficult to diagnose especially for the inexperienced once you have diagnosed the failed component we can provide you with excellent recycled components off cars we have taken apart we can solve your problem for a fraction of dealer s prices on some items we may suggest new or even remanufactured components as availability dictates we will always save you money daily driver section auto repairs then now electronic control module the electronic control modules ecm or electronic control units ecu are the gathering point for electrical signals that come from a variety of on-board sensors these sensors detect everything engine rpm to temperature wheel speed throttle position to electrical load etc you get the idea these control modules engine management and anti-lock brakes electronic transmissions onboard computers collect information and respond with output in a pre-programmed manner this pre-programming has given the engineers very precise control over vehicle systems changing this programming after-market performance chips has given the modern hot -rodder a unique way to improve the vehicle s performance but not necessarily its longevity if a control module is malfunctioning it can be a serious problem we take the electronic components out of good-running vehicles and sell them guaranteed to perform as new if you or your mechanic have diagnosed a faulty unit call us with the part number right off the part and we ll get you a replacement quick and at a great price ignition modules these ignition triggering devices are solid state and occasionally fail if yours does you won t be able to start your car call us with the part number on yours they re usually located in the cowl area and we ll get you back on the road quickly recycled in stock $60 80 voltage regulators a bosch type b motorola type cnew bosch type relays these little switching devices simply connect the current to the accessory calling for it by having relays more direct routing of current can be accomplished the shorter the distance the electricity has to travel the more efficient the electrical system is check the part number on the relay you need and we ll sell you a replacement call 4 amps 7 amps 25 amps 10 amps the voltage regulator s duty is to make sure the current produced by your alternator is in the correct voltage range the battery and other electronic components must communicate in the same language sometimes the contacts may break and cause the current to flow insufficiently call us if you need a voltage regulator ­ we stock all types all the water-cooled gas-powered ® vw cars from `81-up use a coolant-temp sensor to tell the fuel-injection computer what temperature the engine is running at the sensor does this by sending the computer a resistance signal in ohms that changes with temperature the computer then adjusts the amount of fuel sent to the engine based on this signal the symptoms of a bad coolant temp sensor can be an engine that starts hard or misses when cold but runs fine when warm another symptom is an engine that loads up the spark plugs and runs rich for no apparent reason ignition good you can easily test these sensors with a simple ohm meter the resistance values ohms are in the bentley manual and a new coolant temp sensor is relatively inexpensive you can even install it yourself we have them new and used give us a call sensor 16v `86-92 #sn15519 29.95 sensor water neck g/j `83-84 #sn37818 .39.95 on hose connector rabbit® `81-84 and others pipe with red connector #sn3057 .25.90 golf®/jetta®/passat® `93-99.5 4 pin black/yellow #sn16802 .29.99 sensor blue plastic 2 pin most `88-94 golf/jetta/passat #sn13313 .19.95 golf/jetta/new beetle/passat `99 05 4 pin blue #sn18309 21.95 4 pin brown sn17961 .32.95 tech tip e alternator battery a replace with c b #sn3023 29.95 c #sn10138 29.95 d vr 6 golf/jetta iii passat all `92-99.5 with vr 6 engine sn#17110 .39.95 e 4 cyl golf/jetta iii `93-99.5 with valeo alternator these are for 90 amps ignition system sn#19996 39.95 f all new beetle golf/jetta `99.5-04 with bosch fuel pump alternator heated sn#19997 39.95 rear window 10 amps 10 amps fresh air fan headlight tech/safety tip · don t disable any safety mechanism that may be designed into the engine management system · don t spray injectors into open air when testing the vehicle finely atomized fuel spray is highly flammable and unhealthy to breathe · don t apply battery voltage directly to electronic port injectors to test them · don t remove or attach the wiring harness plug to the vehicle ecm with ignition on detach ecm plug before electric welding on vehicle we de-mystify vw ® repair call us for free advice p-43

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