- All consumers of the onboard electrical network. Check functionality.
- Glass cleaner brushes. Check the condition of the rubber band and the resting position of the brushes.
- Glass washer. Check the operation, the position of the jets. Top up with washer fluid and check the operation of the headlight washer.
- Accumulator battery. Check the fastening strength, electrolyte level and top up with distilled water if necessary.
- Headlights. Check the position of the headlights and, if necessary, correct the angle of inclination of the optical axis of the headlights (In workshop).
- Self-diagnosis system. Read logged trouble codes (In workshop). This requires an appropriate diagnostic tester, e.g. VW-V.4S-5051 (A) or VAS-5052 with connecting wires, for example. VAS-5051/6A. The tester is connected to the diagnostic socket in the footwell on the driver's side, under the instrument panel (see illustrations 28.0 and 28.0a).
- Readout-command device. Delete old maintenance data and enter new ones (In workshop). This operation can only be performed using a diagnostic tester.
Checking the consumers of the on-board network
Special tools and fixtures are not required.
Check the operation of the devices listed below. Troubleshoot any identified issues, if necessary.
Depending on the equipment of the vehicle, some consumers of the on-board network may be missing from the list below.
- Lighting devices: dipped and main beam headlights, fog lights, direction indicators, emergency light signaling, side lights, fog lights, reversing lights, brake lights, parking lights.
- Interior lighting, glove box lighting, ashtray lighting, trunk lighting, ignition stutter lighting, ignition stutter lighting.
- Giving a warning signal when the lights or radio is not turned off.
- All switches on the instrument panel and center console.
- Instrument panel with all indicators, counters, bulbs and lights.
- Sound signal.
- Windshield wipers and washers, headlight cleaner.
- Cigarette lighter front and rear.
- External rear-view mirrors with electric drive and heating.
- Electric windows.
- Sunroof with automatic drive.
- Central locking, remote control.
- Seat adjusters and seat belt adjuster.
- Seat heaters.
- Radio.
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