Vehicle equipment and devices Audi 100 C4, petrol
Checking indicators and alarms
TO No.28 Get behind the wheel and check one thing at a time: Does the clock work? (digital or pointer)? Turn on the ignition. The battery charge indicator and...
TO No.28 Get behind the wheel and check one thing at a time: Does the clock work? (digital or pointer)? Turn on the ignition. The battery charge indicator and...
Instrument cluster elements
Disassembly In our description we adhere to the most frequently installed VDO instrument cluster on the Audi-100: Without disassembling the instrument cluster...
Disassembly In our description we adhere to the most frequently installed VDO instrument cluster on the Audi-100: Without disassembling the instrument cluster...
Speedometer
Previously, we were accustomed to a speedometer that was driven by a flexible shaft - the speedometer shaft. It is completely different in the Audi 100: its...
Previously, we were accustomed to a speedometer that was driven by a flexible shaft - the speedometer shaft. It is completely 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...
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 lowest-power version of the Audi-100 (with a 74 kW engine) the instrument cluster is equipped with a large clock with a regular dial and hands as...
Only in the lowest-power version of the Audi-100 (with a 74 kW engine) the instrument cluster is equipped with a large clock with a regular dial and hands as...
Fuel quantity indicator
The petrol level is displayed on the dashboard. Thus, the fuel level indicator is nothing more than a voltmeter, the full voltage to which is supplied when the...
The petrol level is displayed on the dashboard. Thus, the fuel level indicator is nothing more than a voltmeter, the full voltage to which is supplied when the...
Coolant temperature indicator
The coolant temperature indicator works in much the same way as the fuel level indicator. Power is supplied to the device when the ignition is on, and the...
The coolant temperature indicator works in much the same way as the fuel level indicator. Power is supplied to the device when the ignition is on, and the...
Voltage stabilizer
On the back of the instrument cluster block, a small box is screwed with three bolts - a voltage stabilizer. Its task is to supply the temperature and fuel...
On the back of the instrument cluster block, a small box is screwed with three bolts - a voltage stabilizer. Its task is to supply the temperature and fuel...
Additional devices
As an optional extra, three additional instruments can be integrated into the instrument cluster on the right: an oil pressure gauge, an oil temperature gauge...
As an optional extra, three additional instruments can be integrated into the instrument cluster on the right: an oil pressure gauge, an oil temperature gauge...
Upper indicators in the instrument cluster
If the car is not equipped with an automatic check system, then on the dashboard at the top between the round instruments there are control indicators for the...
If the car is not equipped with an automatic check system, then on the dashboard at the top between the round instruments there are control indicators for the...
Coolant indicator
If the coolant indicator starts flashing while driving, stop immediately. Check the coolant level (chapter " Cooling system ") and add coolant or water if...
If the coolant indicator starts flashing while driving, stop immediately. Check the coolant level (chapter " Cooling system ") and add coolant or water if...
Brake system indicator
Troubleshooting the Brake System Indicator When the ignition is turned on, the brake system indicator flashes to check the operation, when the engine is...
Troubleshooting the Brake System Indicator When the ignition is turned on, the brake system indicator flashes to check the operation, when the engine is...
Oil pressure indicator
The engine oil pressure in the Audi-100 is controlled by two hydraulically operated switches and a control unit with a buzzer (the latter two are combined in a...
The engine oil pressure in the Audi-100 is controlled by two hydraulically operated switches and a control unit with a buzzer (the latter two are combined in a...
Direction indicator lights
To the right and left of the central instrument panel display are both direction indicators. They are connected directly to the wiring of the corresponding...
To the right and left of the central instrument panel display are both direction indicators. They are connected directly to the wiring of the corresponding...
Bottom indicators
The instrument cluster display contains a number of indicators that we want to describe in the following paragraphs. We begin the description with the upper...
The instrument cluster display contains a number of indicators that we want to describe in the following paragraphs. We begin the description with the upper...
Battery charge indicator
The battery charge indicator should neither glow nor flash when the engine is running. Otherwise, there is a power supply fault, see the list of faults in the...
The battery charge indicator should neither glow nor flash when the engine is running. Otherwise, there is a power supply fault, see the list of faults in the...
Anti-lock braking system indicator
On models equipped with ABS, when the ignition is turned on, this indicator lights up to check the operation. If this does not happen, the bulb should be...
On models equipped with ABS, when the ignition is turned on, this indicator lights up to check the operation. If this does not happen, the bulb should be...
High beam indicator
When the high beam is on or when the high beam indicator is used, the high beam indicator receives power from the right headlight high beam fuse (Chapter "...
When the high beam is on or when the high beam indicator is used, the high beam indicator receives power from the right headlight high beam fuse (Chapter "...
Parking brake indicator
When the parking brake is applied, the switch at the parking brake lever forms a connection with the "ground". This should light the indicator, which is...
When the parking brake is applied, the switch at the parking brake lever forms a connection with the "ground". This should light the indicator, which is...
Indicators on the right
Above the additional instrument panel there is another panel for additional indicators. We will talk about them later. Directly under the parking brake lever,...
Above the additional instrument panel there is another panel for additional indicators. We will talk about them later. Directly under the parking brake lever,...
Trailer Direction Indicator
It flashes rhythmically if the trailer's turn signal is functioning when the trailer's electrics are connected. If one of the trailer's turn signals is faulty,...
It flashes rhythmically if the trailer's turn signal is functioning when the trailer's electrics are connected. If one of the trailer's turn signals is faulty,...
Airbag indicator
For vehicles equipped with an airbag, this indicator lights up to check operation for approximately ten seconds after the ignition is turned on. If this is not...
For vehicles equipped with an airbag, this indicator lights up to check operation for approximately ten seconds after the ignition is turned on. If this is not...
Self-diagnosis system
As a special feature, the Audi 100 offers a self-diagnosis system. It monitors eight functions or operating states after the ignition is switched on and after...
As a special feature, the Audi 100 offers a self-diagnosis system. It monitors eight functions or operating states after the ignition is switched on and after...
Switches
Toggle switches The lever switches (toggle switches) located behind the steering wheel are assembled in the Audi-100 into a complex unit and can therefore only...
Toggle switches The lever switches (toggle switches) located behind the steering wheel are assembled in the Audi-100 into a complex unit and can therefore only...
Ignition switch
In 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 workshop, because to...
In 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 workshop, because to...
Checking switches
You can pierce the cable insulation with a test light with a needle contact and determine which cables are live. Select the electrical circuit diagram that...
You can pierce the cable insulation with a test light with a needle contact and determine which cables are live. Select the electrical circuit diagram that...
Lighting and radio cut-off buzzer
The buzzer sounds if the car's headlights are still on or the radio is turned off when the door is open and the ignition key is removed. This sound comes from...
The buzzer sounds if the car's headlights are still on or the radio is turned off when the door is open and the ignition key is removed. This sound comes from...
Cigarette lighter
The electric cigarette lighter is constantly powered through the corresponding fuse. If the cigarette lighter does not work despite a working fuse, this means...
The electric cigarette lighter is constantly powered through the corresponding fuse. If the cigarette lighter does not work despite a working fuse, this means...
Rear window heating
The rear window heating is switched on and off directly by a switch located on the instrument panel. Power is supplied to the switch when the ignition is on...
The rear window heating is switched on and off directly by a switch located on the instrument panel. Power is supplied to the switch when the ignition is on...
Checking windshield wipers and washers
Constantly checking Turn on the ignition. Do the wipers work at both speeds and do they return to the park position when turned off? Does the intermittent mode...
Constantly checking Turn on the ignition. Do the wipers work at both speeds and do they return to the park position when turned off? Does the intermittent mode...
Windscreen wiper motor
The windshield wiper motor is supplied with power when the ignition is on via the X-contact unloader relay and fuse (chapter " Body electrical system "). The...
The windshield wiper motor is supplied with power when the ignition is on via the X-contact unloader relay and fuse (chapter " Body electrical system "). The...
List of windshield wiper malfunctions
Is the wiper motor or supply wire faulty? The following check will help you identify a faulty windshield wiper motor or wiring: Remove the trim above the water...
Is the wiper motor or supply wire faulty? The following check will help you identify a faulty windshield wiper motor or wiring: Remove the trim above the water...
Rear window wiper
The rear window wiper is switched on when you press the wiper lever towards the dashboard. At the same time, the windshield washer pump is switched on and...
The rear window wiper is switched on when you press the wiper lever towards the dashboard. At the same time, the windshield washer pump is switched on and...
Refilling the windshield washer reservoir
Constantly checking Suspension from exhaust gases, oil fumes and silicone from varnish care products are constantly deposited on the glass. In warm seasons, it...
Constantly checking Suspension from exhaust gases, oil fumes and silicone from varnish care products are constantly deposited on the glass. In warm seasons, it...
Headlight washer system
On vehicles with the appropriate equipment, the headlamp washing system directs two jets of water to the lenses if the windscreen washing system is activated...
On vehicles with the appropriate equipment, the headlamp washing system directs two jets of water to the lenses if the windscreen washing system is activated...
Intensive glass washing system
The intensive windshield washer system sprays cleaning fluid onto the glass when you press the button. If this does not happen, the cause of the malfunction...
The intensive windshield washer system sprays cleaning fluid onto the glass when you press the button. If this does not happen, the cause of the malfunction...
Radio system
Removal In our descriptions we rely on the installation method used by the manufacturer. Make sure there is a security number code - for car radios with...
Removal In our descriptions we rely on the installation method used by the manufacturer. Make sure there is a security number code - for car radios with...
Rear window antenna
The main advantage: it does not disturb others. In addition, it is not damaged when washing the car. With this type of antenna, the antenna for receiving CB is...
The main advantage: it does not disturb others. In addition, it is not damaged when washing the car. With this type of antenna, the antenna for receiving CB is...
Electrically adjustable exterior rearview mirrors
Both mirrors are adjusted using the switch on the left in the center console. In addition, the mirror surface is heated if the rear window heating is switched...
Both mirrors are adjusted using the switch on the left in the center console. In addition, the mirror surface is heated if the rear window heating is switched...
Centrally controlled locking system
All doors, as well as the trunk and fuel tank lid, can be locked or unlocked by turning the driver's door key, or the front passenger door key, or the trunk...
All doors, as well as the trunk and fuel tank lid, can be locked or unlocked by turning the driver's door key, or the front passenger door key, or the trunk...
Electric windows
The order of operation of the window lifters in the Audi-100 is determined not only by the switches, but also by the window lifter control unit, located in an...
The order of operation of the window lifters in the Audi-100 is determined not only by the switches, but also by the window lifter control unit, located in an...
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 installed with...
The Audi 100 has two different types of sliding sunroof: Electric sliding sunroof with key control. If the sliding sunroof in the vehicle is installed with...
Checking heating and ventilation
Turn the left control of the air access and ventilation switch slowly from left to right: air access opens, the fan increases speed by 4 steps. Turn the middle...
Turn the left control of the air access and ventilation switch slowly from left to right: air access opens, the fan increases speed by 4 steps. Turn the middle...
Heater fan
The fan motor has four speeds, which are set by turning the "Air Access and Fan" control on the instrument panel. The fan speed is changed by connecting...
The fan motor has four speeds, which are set by turning the "Air Access and Fan" control on the instrument panel. The fan speed is changed by connecting...
Replacing the dust filter
Audi requires that the dust filter, which has been installed as standard since August 1992, be replaced every 30,000 km. TO #38 Lift the cover of the...
Audi requires that the dust filter, which has been installed as standard since August 1992, be replaced every 30,000 km. TO #38 Lift the cover of the...
Heating and ventilation drive
All functions of the heating and ventilation system in the Audi-100 can be controlled from the unit located on the dashboard. Three so-called Bowden cables run...
All functions of the heating and ventilation system in the Audi-100 can be controlled from the unit located on the dashboard. Three so-called Bowden cables run...
For removing heating and ventilation
Audi recommends making your own small hooks from 3mm wire, with the end bent to 6mm. Nozzle on the top left: pry the grille out of the air duct manually....
Audi recommends making your own small hooks from 3mm wire, with the end bent to 6mm. Nozzle on the top left: pry the grille out of the air duct manually....
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