5.7
Tightening wheel bolts to specific torque
Special tools and workshop equipment required
♦ Torque wrench
Tightening torque for steel and light alloy wheels 120 Nm.
5.8
Tyre inspection display: Calibration
Note
♦
The calibration of the “tyre inspection display” must be per‐
formed after each tyre pressure correction, while paying at‐
tention to the correct tyre pressure values
⇒ “5.6.3 Inspecting the tyre pressure (including spare wheel),
if necessary correcting pressure”, page 113
.
♦
If no pressure loss and no tyre damage is discovered after a
tyre pressure warning, this erroneous warning can be elimi‐
nated by a calibration.
♦
If the warning light comes on, a pressure lost was detected. In
this case, the pressure in all the tyres has to be inspected and
a calibration is performed.
♦
If the warning light comes on even after the calibration has
been performed (or no pressure loss or tyre damage was de‐
tected), a system failure exists ⇒ Vehicle diagnostic tester.
The tyre inspection display operates via the ABS speed sensors,
which compare the wheel rotations and through this also the
wheel circumferences. In case of a change in the wheel circum‐
ference, the warning light in the dash panel insert lights up.
The tyre circumference can change, if
• the tyre pressure is too low
• the tyre structure is damaged
• the vehicle is loaded on one side
• the wheels on an axle are heavily loaded (e.g when operating
a trailor, on steep gradients).
• snow chains are mounted
• an emergency wheel is mounted
• a wheel is changed on an axle.
A calibration is required at each pressure change, at each tyre
change (also change from front to rear) and after working on the
chassis in the workshop, which has an influence on the tyre in‐
spection display.
The tyre inspection display has a warning light in the dash panel
insert.
Calibration for vehicles without radio and with radio preinstalla‐
tion.
– Switch on ignition.
Octavia III 2013 ➤ , Octavia III 2014 ➤
Maintenance - Edition 12.2014
123
