|
Smoke from Tailpipe (Blue, Black, White) |
 |
 |
 |
|
Written by Administrator
|
|
Monday, 19 July 2010 02:40 |
SYMPTOM SUMMARY
The vehicle emits excessive smoke from the tailpipe.
USUAL CAUSE
Smoke from the tailpipe can be caused by several things depending on the type of smoke emitted.
|
|
Read more...
|
|
|
Written by Administrator
|
|
Monday, 19 July 2010 02:37 |
The cruise control system allows the driver to set and maintain a steady driving speed. The system is designed to maintain speed over a variety of driving conditions including slightly hilly terrain and moderate winds. Most systems provide speed adjustment capabilities, allowing the driver to change the speed of the vehicle to match driving conditions without disengaging the cruise control. There are a variety of cruise control systems in use today. Most share similar components and basic operating system design. The variation lies in the control module and throttle actuating system used. Some vehicles use a stand alone cruise control module, while others will incorporate the cruise module as a function of the engine control module.
|
|
Last Updated on Monday, 19 July 2010 02:39 |
|
Read more...
|
|
Written by Administrator
|
|
Monday, 19 July 2010 02:35 |
THROTTLE POSITION SENSOR
The Throttle Position Sensor (TPS) is a variable resistor that changes value based on throttle movement. The control module uses information from this sensor to adjust fuel delivery to compensate for throttle opening. Vehicles equipped with electronically shifted transmissions use information from the TPS to control transmission shifting as well. Reference voltage is supplied to the TPS by the control module and changed by an internal variable resistor to output a signal relative to throttle position. The typical TPS will have a high resistance at closed throttle, that will steadily decrease as the throttle is opened. The signal produced by the TPS will be low voltage output at idle and a voltage output that reaches maximum reference voltage at full throttle, near 4.5 volts. By monitoring changes in the TPS signal voltage, the control module is able to determine throttle angle and calculate fuel delivery accordingly. Auto repair jobs involving the troubleshooting of a fast idle condition should look at the throttle position sensor as the culprit.
|
|
Read more...
|
|
|
Automotive Warning Lights |
|
|
|
|
Written by Administrator
|
|
Monday, 19 July 2010 02:34 |
WARNING LIGHTS
The warning lights in a vehicle's instrument cluster are used to alert the operator of conditions affecting many different vehicle functions. Warning lights can be used in place of a gage, or as an enhancement to a vehicle with gages. Warning lights can be controlled directly by sensors or indirectly by the vehicle control module. One of the most common warning light systems is the sender controlled ground type of warning light. The warning light will have a twelve volt supply voltage with the sender completing the ground circuit to illuminate the light when there is a failure. This type is most commonly used for parking brake warning lights, low oil pressure lights, and engine coolant temperature lights.
Charging systems commonly use a warning light that uses a system called the balanced circuit. The warning light receive battery voltage on the input side of the light, while the ground side is connected to the alternator output circuit. When the key is on, and the engine is off, current will flow through the light and ground inside the alternator. When the engine is running, current will flow out of the alternator output circuit and will stop current flowing through the warning light by equalizing voltages on either side of the bulb.
Warning lights are used by vehicle control modules to inform operators of system failure or malfunction. One example is the Service Engine Soon light. This light is operated by the control module using a driver inside the control module. If the control module has a system failure or a system operating outside of its control parameters, it will illuminate the Service Engine Soon light. Other automotive systems will use a similar system to operate their respective lights. The anti-lock brake module may use the brake warning light and an anti-lock light to warn operators.
IGNITION SWITCH
A key operated switch that supplies current to the devices needed to start and run the vehicle. The ignition switch can also supply current to automotive accessories. It contains several set of contacts that can carry higher current loads. Some are designed to allow current to ignition and fuel components when cranking, while others are designed to limit current flow to unneeded components when cranking. |
|
Battery, Starter & Solinoid Basics |
|
|
|
|
Written by Administrator
|
|
Monday, 19 July 2010 02:33 |
|
Todays vehicles place a huge demand on their electrical systems. It is common for a majority of vehicles to use alternators that produce 80 amps of electricity as standard equipment. This has been brought about by the many electrical accessories that are available on vehicles. Rear window defoggers, high powered audio systems, and comfort features such as power seats or windows, can consume large amounts of power from the electrical system. Because of this, electrical systems have become increasingly complex and elaborate. While they still are 12 volt, direct current design. Computer controlled charging systems, advanced battery design, and complex micro-electronics are increasingly in normal use in today's vehicles.
|
|
Read more...
|
|
|
|
|
<< Start < Prev 1 2 Next > End >>
|
|
Page 1 of 2 |
