Checking indicators and signaling devices MOT No. 28 Get behind the wheel and check one by one: Does the clock work (digital or pointer)? Turn on the ignition. The battery charge indicator, ABS...
Elements of the instrument cluster Disassembly In our description, we adhere to the VDO instrument cluster most often installed on the Audi-100: Without disassembling the instrument cluster...
Speedometer Previously, we were accustomed to the speedometer, which was driven by a flexible shaft - the speedometer shaft. Quite different in the Audi-100: its...
Tachometer The tachometer shows the number of revolutions per minute of the engine crankshaft. To do this, it receives control pulses from the ignition system. They are...
Watch Only in the smallest version of the Audi-100 (with 74 kW motor) a large clock with a conventional dial and hands is integrated as standard in the instrument...
Fuel quantity indicator The petrol level is displayed on the dashboard. Thus, the fuel quantity indicator is nothing more than a voltmeter, the full voltage of which is supplied when...
Coolant temperature indicator The coolant temperature indicator works in much the same way as the fuel gauge. Power is supplied to the device when the ignition is on, the connection on...
Voltage regulator On the reverse side of the instrument cluster block, a small box is screwed with three bolts - a voltage stabilizer. Its task is to supply the temperature and...
Additional devices As additional equipment on the right side of the instrument cluster, three additional instruments can be integrated - an oil pressure gauge, an oil temperature...
Upper indicators in the instrument cluster If the car is not equipped with an auto-test system, then on the scoreboard at the top between the round instruments there are control indicators for the...
Coolant indicator If the coolant indicator flashes while driving, stop immediately. Check coolant level (chapter « Cooling system ») and add coolant or water if necessary. If...
Brake indicator Troubleshooting Brake Indicator When the ignition is turned on, the brake system indicator flashes to check the operation, when the engine is running, it...
Oil pressure indicator The engine oil pressure in the Audi-100 is controlled by two hydraulic switches and a control unit with a buzzer (both of the latter are combined in a...
Direction indicators To the right and left of the central display of the instrument panel are both indicators of the direction of rotation. They are connected directly to the...
Lower indicators The instrument cluster display contains a number of indicators that we want to describe in the following paragraphs. We start the description with the upper...
Battery charge indicator When the engine is running, the battery charge indicator should not «smolder», nor flash. Otherwise, there is a power supply fault, see list of faults in...
Anti-lock system indicator On models equipped with ABS, when the ignition is turned on, this indicator lights up to check the operation. If it doesn't, replace the light bulb (as already...
High beam indicator When the high beam is on or when the high beam light signal is used, the high beam indicator receives power from the fuse «high beam» right headlight (chapter...
Parking brake indicator When the parking brake is applied, the switch at the parking brake lever forms a connection with «weight». Thus, the indicator should light up, which, when the...
Indicators on the right Above the panel of additional devices there is another panel for additional indicators. They will be discussed further. Directly under the parking brake lever...
Trailer turn signal indicator It flashes rhythmically if the corresponding trailer turn signal is functioning while the trailer's electrics are connected. If one of the «turn signals»...
Airbag indicator For vehicles equipped with an airbag, this indicator is lit to check operation for about ten seconds after the ignition is turned on. If not, replace the lamp...
Self-diagnosis system The Audi-100 offers a self-diagnosis system as special equipment. It monitors eight functions or operating states, after switching on the ignition and after...
Switches Lever switches Lever switches (toggle switches), located behind the steering wheel are assembled in the Audi-100 in a complex unit and thus can only be...
Egnition lock In the pages of this book, we want to address only the electrical part of the ignition switch. Repair of the lock mechanism should be carried out by a...
Checking switches You can pierce the cable insulation with a needle contact test lamp and find out which cables are live. Select the wiring diagram that matches the circuit...
Light and radio off buzzer The buzzer will sound if the vehicle headlights are still on or the radio is switched off with the door open and the ignition key removed. This sound comes...
Cigarette lighter The electric cigarette lighter is permanently supplied with a suitable fuse. If the cigarette lighter does not work, despite a good fuse, this means that the...
Rear window heating The heated rear window is turned on and off directly by a switch located on the dashboard. Power is supplied to the switch when the ignition is on from the...
Checking windshield wipers and washers Permanent check Turn on the ignition. Do the wipers work at both speeds and do they return to park when turned off? Does the intermittent operation function,...
Wiper motor The wiper motor is powered when the ignition is on through the X-terminal unloader relay and fuse (chapter « Body electrical system »). The wire terminals on...
List of wiper faults Faulty wiper motor or lead wire? The following test will help you identify a malfunction of the wiper motor or wiring: Remove the cover above the sump tank at...
Rear window wiper The rear window wiper is activated when you push the wiper lever switch towards the instrument panel. At the same time, the windshield washer pump is turned...
Replenishment of the glass washer reservoir Permanent check Suspension from exhaust gases, oil evaporation and silicone from lacquer care products are constantly deposited on the glass. In the warm...
Headlight washer system On vehicles with the appropriate equipment, the headlight washer system sends two jets of water to the lenses if the washer system is activated when the dipped...
Intensive windshield washer system The intensive windshield washer system sprays the glass with a cleaning fluid at the touch of a button. If this does not happen, the cause of the malfunction...
Radio system Withdrawal In our descriptions, we proceed from the installation method used in the manufacturing plant. Make sure you have a security number code - for an...
Rear window antenna The main advantage: it does not interfere with others. In addition, when washing the car, it is not damaged. With this type of antenna, two metal conductors at...
Electrically adjustable exterior mirrors Both mirrors are controlled by a switch on the left side of the center console. In addition, the surface of the mirrors is heated when the rear window heating...
Central locking system All doors, as well as the trunk and fuel tank lids, can be locked or unlocked by turning the key in the driver's door, or the front passenger's door, or the...
Electric windows The order of operation of the windows in the Audi-100 is determined not only by the switches, but also by the power window control unit located in the...
Sliding sunroof The Audi-100 has two different types of sliding sunroof: Electric sliding sunroof with key control. If the sliding sunroof in the vehicle is fitted with four...
Checking heating and ventilation Turn from left to right slowly the left knob of the switch for air supply and ventilation: air supply is opened, the fan speed increases by 4 steps. Turn the...
Heater fan The fan motor has four speeds, which are set by turning the knob «Air access and fan» on the dashboard. The fan speed is changed by connecting resistors with...
Replacing the dust filter Audi prescribes the replacement of the dust filter fitted as standard since August '92 every 30,000 km. MOT No. 38 Raise the waterproof cover. Unlock the two...
Heating and ventilation drive All functions of the interior heating and ventilation system in the Audi-100 car can be controlled from the unit located on the dashboard. Three so-called...
For removing heating and ventilation Audi recommends making your own small hooks from 3 mm wire, the end of which is bent 6 mm. Nozzle top left: pry off the grille and pull it out of the air duct...