General remarks
The instructions below guarantee a safe working environment and the safety of the electrical and electronic equipment of the vehicle. Additional instructions related to individual types of work are given in the relevant sections of the Manual.
Equipment and devices
Before diagnosing car systems, make sure that the diagnostic equipment is in good condition, the connecting wires and lugs are not damaged. Be sure to check the condition of the wires and lugs of the power supply circuit of the device.
Polarity
Connect the battery to the vehicle circuit correctly, and also observe the polarity when connecting diagnostic equipment.
High voltage circuits
When disconnecting live high voltage wires, use pliers with insulated handles. Do not allow high voltage wires to come into contact with other electrical components, especially with the electronic control unit. Be careful when measuring the voltage at the ignition coil terminals with the engine running; in this case, high-voltage pickups are possible.
WARNING: - VEHICLES ARE EQUIPPED WITH DOUBLE XENON HEADLAMPS: - The following instructions must be observed when working with them. Failure to follow instructions could result in exposure to harmful ultraviolet rays, high voltage injury, burns, or an explosion.
- All work should be carried out with special glasses and protective gloves.
- Make sure the headlights are off before removing bulbs.
- Do not touch the glass part of the lamp with your hands.
- Under no circumstances should the headlights be switched on with the bulbs removed.
- Lamps can only be checked after the lamp has been installed in the headlight socket.
- Unusable lamps must be disposed of in accordance with local regulations.
Connectors and wiring harnesses
The space of the engine compartment is an environment that is especially unfavorable for the placement of electrical system components and connectors:
- Before disconnecting or connecting diagnostic equipment, make sure that the surface of the electrical system components is dry and free from oil leakage.
- Disconnectable connectors must not show signs of damage from oil, coolant or other liquids. Such damage can adversely affect the operation of systems or cause sudden failure.
- Never disassemble the electrical connectors by applying strong mechanical force, such as using a screwdriver as a lever or pulling on the harness.
- Before disassembling the connector, bring the connector lock to the disassembled position; before assembling the connector, make sure that the mutual position of the connector parts is correct.
- All protective elements (covers, cases) must be replaced if damaged.
In order to verify that a component is malfunctioning, follow the following sequence of actions:
- Switch off the ignition and disconnect the battery.
- Remove the component. Fix the disconnected wiring harness in a hanging position.
- When replacing a component, do not allow oily hands to touch the electrical connectors; insert the connector into the mating part until the latch is completely snapped into place.
Disconnecting the battery
Before disconnecting the battery, make sure the key is removed from the ignition switch. After that, at least 2 minutes must elapse before the battery is disconnected. Failure to comply with this condition may cause:
- Damage to the hardware of the navigation system
- Incorrect readings of the fuel gauge
Before disconnecting the battery, turn off the burglar alarm and turn off all electrical consumers. If you need to remove the radio for repair, you must first disable its code protection.
ATTENTION: Do not disconnect the battery while the ignition is on.
ATTENTION: To prevent damage to the navigation system hardware, a period of at least 2 minutes must elapse from the moment the ignition is turned off until the battery is disconnected.
CAUTION: To prevent damage to electrical components, always disconnect the battery when servicing or servicing electrical equipment. "Mass" The wire should be disconnected first and connected last.
CAUTION: After disconnecting (connections) battery, make sure that the connecting wires do not come into contact with moving parts.
After connecting the battery, turn the steering wheel all the way to the right and left (with the engine running). This is necessary so that the dynamic stabilization system (DSC) calibrated the steering angle sensor. Failure to do so will cause several of the control panel's visual annunciators to turn on.
Charging the battery
Do not charge the battery directly on the vehicle. When charging the battery, ensure that the area is well ventilated and take all precautions to prevent open flames or sparks.
Safety measures when working with the ignition system
High voltage is generated in the ignition system. Take the following precautions when working on the ignition system.
WARNING: Before working on the ignition system, ensure that the high voltage leads, adapters, and high voltage part of the diagnostic equipment are properly insulated and protected to prevent accidental contact and reduce the risk of injury. People with implanted pacemakers are not allowed to work with the ignition system and diagnostic equipment.
Rules for working with electrical equipment components
Switch off the ignition before disconnecting or connecting electrical components. This will eliminate the possibility of damage to electronic equipment from power surges at the time of disconnecting live components.
The workplace and hands must be clean from oil, chips and other contaminants. The oil attracts dirt particles which can cause or cause current leakage (short circuit) or increasing circuit resistance.
When handling printed circuit boards, be careful, handle them only by the edges. Remember that some electronic components are afraid of static electricity.
Never use excessive force to connect the connectors; this requirement applies in particular to printed circuit board connectors. Damaged contacts can cause short circuits or open circuits.
Before starting work and periodically during diagnosis, touch with your hand "masses" vehicle to drain static electricity. Some components of electronic equipment can be damaged by static electricity on the body or clothing.
Lubrication of electrical components
Some electrical connectors located under the bottom of the body or under the hood are protected against corrosion during production with a special grease. If the integrity of such connectors has been violated or the connectors are to be replaced, then they must be treated with a special lubricant: Lubricant catalog number BAU 5811, supplied in tubes of 150 grams.
NOTE: Do not use lubricants other than BAU5811. This can cause grease to get onto relay and switch contacts and cause intermittent contact loss or failure of operation.
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