Checking the brake system on a test bench
1. Measure the deceleration values for the service brake system
Attention: the test must be carried out with the engine running to ensure maximum vacuum gain.
Attention: the permissible deviation from the largest value in each case should be no more than 25%. The braking effect must be manifested no later than a quarter of the total pedal travel.
Attention: if there are deviations from the control values specified in the description of the work, it is necessary to find out and eliminate the cause (by separate order).
Functional check of systems
Check of operability of a sound signal and control lamps
Examination
To check these systems, you need to perform the following steps.
1. Turn on the ignition.
2. Apply the parking brake.
3. Check indicator lamps.
Sound signal, control lamps
3.1. When the ignition is switched on, all control lamps should turn on. The lamps listed below should go out after a few seconds: Viecoda indicator lamp failure (1), indicator light for open doors (2), high beam indicator light (3), fan failure indicator light (E-box fan) (4), electronic body level indicator light (5), seat belt indicator light (6), indicator light for brake pad wear (8), UM (9), glow plug indicator light (10), light indicator of the acceleration control system (ASR) (11), indicator light for acceleration control/electro-pneumatic active power control (ASR/EPS) (12), indicator light for anti-lock brakes (ABS) (13), engine diagnostic indicator light (14), engine oil level indicator light (15), additional security system indicator light (16), coolant temperature indicator light (17), coolant level indicator light (18), fuel filter dirty indicator light (19), light indicator for the presence of water in the fuel filter (20), air filter dirty indicator light (21), washer fluid level indicator light (22), brake fluid level indicator light (23). fuel reserve indicator light (25).
Note: indicator light duration (10) depends on coolant temperature.
3.2. Start the engine.
Attention: after starting the engine, the charging indicator (7) and all other indicators that did not turn off should turn off, except for the parking brake indicator light (24), 3.3. Check the operation of the direction indicator light.
4. Check the sound signal.
5. Check the dome light.
Headlights, exterior lights
Check the exterior lighting by turning on the parking lights, dipped headlights, high beams, fog lights, fog tail light, direction indicators and their repeaters, alarms, brake lights and reversing lights in turn.
Wiper, front (rear) windshield washer
Check the operation of the following devices:
- front wiper at all speeds;
- rear wiper;
- front washer;
- rear window washer;
- headlight washer.
Check the condition of the wiper blades.