Skoda Octavia II 2004 Workshop Manual page 18

Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
The ABS control unit - J104- -1- and the ABS hydraulic unit - N55-
-2- form a single unit. They can only be separated after the
complete unit is removed. The ABS control unit - J104- can be
separated from the ABS hydraulic unit - N55-
required ⇒ page 61 . The hydraulic pump -3- must not be sep‐
arated from the ABS hydraulic unit - N55- -2-.
New control units supplied by the spare parts area are not coded.
They must be coded after installation ⇒ Vehicle diagnostic tester.
♦ Before starting work on anti-lock brake systems, query the
event memory to check for complaints and conduct guided
fault finding ⇒ Vehicle diagnostic tester.
♦ Do not separate plug connections unless the ignition is switch‐
ed off.
♦ Before commencing work on the ABS systems, switch off the
ignition and disconnect the earth strap at the battery ⇒ Elec‐
trical System; Rep. gr. 27 .
♦ If the battery earth strap is disconnected and connected, carry
out additional operations ⇒ Electrical System; Rep. gr. 27 .
♦ Welding work using electric welding equipment may affect the
ABS system.
♦ Do the following before commencing welding work using elec‐
trical welding tool:
– Disconnect the earth strap from the negative terminal of the
battery and cover the negative terminal.
– Connect the earth connection of the electric welding tool di‐
rectly to the part to be welded. There must not be any electri‐
cally insulated parts between the earth connection and the
welding point.
– Electronic control units and electrical wiring must not touch the
earth connection or the welding electrode.
♦ During painting operations, the ABS control unit - J104- may
be exposed to a maximum temperature of 95 °C for only a
short period, and to a maximum of 85 °C for longer periods
(approx. 2 hours).
♦ Do not drive the vehicle if the connector is unplugged from the
ABS control unit - J104- .
♦ Absolute cleanliness is required when working on the anti-lock
brake system. It is not permitted to use any products which
contain mineral oil, such as oils, greases etc.
♦ Thoroughly clean connection points and the surrounding area
before disconnecting, but do not use any aggressive cleaning
agents, such as brake cleaner, petroleum, thinner or similar.
♦ Place removed parts on a clean surface and cover.
♦ Carefully cover or close opened components if the repair is not
completed immediately (use plugs from the repair kit - 1H0 698
311 A- ).
♦ Only use lint-free cloths.
♦ Do not remove spare parts from their wrappings until immedi‐
ately before installation.
♦ Use only genuine wrapped parts.
♦ When the system is open, do not work with compressed air
and do not move the vehicle.
♦ The valve coils in the ABS control unit - J104- must not be
calibrated.
12
Rep. gr.45 - Anti-lock brake system
⇒ page 42 , if
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