199002725 - 70B ROAD TEST FOR NOISE RECOGNITION

STEPCHECK TO BE PERFORMEDRESOLUTION IF THE CHECK IS NOT OK
1Before proceeding with the test, check that the tyre inflation pressure is correct.Restore the correct tyre inflation pressure.
2Check that the wheels are correctly balancedRebalance the wheels
3Start up the engine and, with the vehicle stationary (switch off the ASR using the special button), check that the noise from the front area is not present.The cyclical noises are due to the power unit.The test can be considered over
4Steer, with the vehicle stationary, to the left and the right and check that there is no irregular noise and check that there is no irregular noise with the gearbox in neutral.Continue as instructed in the    See table S022 GEARBOX NOISE - IN NEUTRAL
5Set off from stationary to check that there is no metallic noise or roughness.Continue as instructed in the    See table S021 GEARBOX NOISE - AT TAKE OFF
6Still setting off from stationary, check that there are no transverse vibrations.Continue as instructed in the
7Carry out a road test on an unmade road engaging the various gears.Continue as instructed in the    See table S023 GEARBOX NOISE - IN A SPECIFIC GEAR
8Carry out a road test on an unmade road engaging the various gears when cornering.Continue as instructed in the    See table S024 GEARBOX NOISE - WHEN CORNERING
9With the help of a colleague, check that the noise is not due to one of the dashboard components not being properly fastened (when your hand is placed on top of it the noise either lessens or disappears).The noise is due to creaking of the interior/exterior dashboard components.The test can be considered over
10If the vehicle is fitted with a sun roof, check that the noise is not being caused by the later by opening and closing it and placing your hand on it to quieten any noise.The noise is due to the sun roof.The test can be considered over
11Brake in safe conditions to check whether the noise is only present during braking as a result of the brake discs.The noise is caused by the brake discs or rear drumsThe test can be considered over
12Pull the handbrake lever gently, whilst driving in a straight line, to check whether the noise disappears.Adjust the handbrake travel
13During the previous check, make sure that there are no transverse vibrations during the pull and release stages.Increase the speed and check that there is no metallic noise, possibly accompanied by transverse vibrations which vary according to the vehicle speed or engine revs.Continue as instructed in the    See table S019 FORECARRIAGE TRANSVERSE VIBRATIONS
14Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no creaking from the front area.Continue as instructed in the    See table S016 FRONT SUSPENSION NOISE (CREAKING/SQUEAKING)
15Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no whistling from the front area.Continue as instructed in the    See table S017 FRONT SUSPENSION NOISE (WHISTLING/HUMMING)
16Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no knocking from the front area.Continue as instructed in the    See table S018 FRONT SUSPENSION NOISE (KNOCKING)
17Carry out a road test on an unmade road (transverse tracks, cobblestones) to define the type of noise, checking that there is no creaking from the rear area.Continue as instructed in the    See table S026 REAR NOISE (CREAKING/SQUEAKING/TICKING)
18Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no whistling from the rear area.Continue as instructed in the    See table S027 REAR NOISE (WHISTLING/HUMMING)
19Carry out a road test on an unmade road (cobblestones) to define the type of noise, checking that there is no knocking from the rear area.Continue as instructed in the    See table S028 REAR NOISE (KNOCKING)
When carrying out Steps 14 to 19, steering in safe conditions to determine whether the noise is present especially when steering and whether it is more noticeable on one of the two sides.In the latter case, subsequent checks require greater care on the side in question. Also check for transverse vibrations accompanied by noise. In this case, continue as indicated in the    See table S019 FORECARRIAGE TRANSVERSE VIBRATIONS