Skoda Workshop Service and Repair Manuals

Checking/removing and installing parts of the ABS system on the front axle Special tools and workshop equipment required t  Wiring loom repair kit, e.g. Skoda Car Tool Kit Škoda, Order No.: S 504 500 V t  Solid lubricant paste-G 000 650- Removing and installing wheel speed sensor Removing –  Raise vehicle.

–  Separate plug connection of wheel speed sensor/wheel speed sensor cable -arrow-. –  Release screw -2-. –  Take the wheel speed sensor -G45- / -G47- out of the wheel bearing housing. Install –  Clean the inner surface of the hole before inserting the wheel speed sensor and coat with a solid lubricant paste -G 000 650-. –  Insert the wheel speed sensor in the bore of the wheel-bearing housing and tighten the screw to 8 Nm. –  Fit together the plug connection of wheel speed sensor cable/wheel speed sensor. –  Actuate steering from left to right up to the stop and check for free movement of the wheel speed sensor cable. –  Lower the vehicle. Check pulse rotor or remove and install –  Raise vehicle. –  Remove wheel.

–  While turning the brake disc, check the pulse rotor -1- for any dirt or damage. –  If the chunking of the pulse rotor is blocked by dirt, the pulse rotor must be cleaned. –  If the pulse rotor is damaged, the wheel hub together with the pulse rotor must be replaced → Axles, steering; Rep. gr.40. –  Attach the wheel. –  Lower the vehicle. Check axial run-out of pulse rotor –  Raise vehicle. –  Remove wheel.

–  Turn the wheel hub and check the distance between the pulse rotor and the wheel speed sensor for evenness (axial run-out tolerance). In this test, the wheel bearing play must be accounted for. l  The axial run-out tolerance of the pulse rotor is 0.3 mm. –  If the axial run-out tolerance is not kept, change the pulse rotor together with the wheel hub → Axles, steering; Rep. gr.40. –  Attach the wheel. –  Lower the vehicle. Removing and installing the wheel speed sensor cables Removing   Note t  It is prohibited to repair shielded leads of the ABS system. t  Before disconnecting the battery determine the code of radio sets fitted with anti-theft coding. t  After connecting the battery, perform the following: –  on vehicles with radio encoding, carry out the coding, –  re-set clock, –  initialise power windows on vehicles fitted with power windows → BookletOctavia –  Disconnect battery.   Note The following 2 work steps do not apply to the 1.6 ltr./55 kW engine:

–  Disconnect the plug of the air mass meter -1- from the air guide pipe of the air filter. –  Unscrew screws -2- at the air filter -3- and lay it aside. –  Remove the relay carrier above the brake servo unit on diesel engines.

–  Release the multi-pin connector and remove it from the ABS control unit.

–  Slacken the cap of the multi-pin connector using a screwdriver and remove it.

–  Release secondary lock (purple) with a small screwdriver in the -direction of the arrow-.

Contact assignment of the plug connection wiring loom/ABS control unit -J104-

Contact	Wiring to component ...
19 + 20	Front right wheel speed sensor -G45-
1 +2	Front left wheel speed sensor -G47-
22 + 23	Rear right wheel speed sensor -G44-
5 + 6	Rear left wheel speed sensor -G46-

–  Press out the relevant contacts using a suitable ejection tool from the wiring loom repair kit. –  Release plug connection on wheel speed sensor and separate plug connector. –  Remove defective wheel speed sensor cable. Install –  Draw in new wheel speed sensor cable. –  Connect wheel speed sensor cable to wheel speed sensor.

–  Clip in wheel speed sensor cable -arrows-.   Note When assembling the wheel speed sensor cable make sure it is not twisted when installed in the wheelhouse.

–  Insert contact in the plug housing and insert the single cable seal with a suitable plug-in tool from the wiring loom repair kit up to the stop. –  Secure the contacts with the secondary lock and position the cap of the multi-pin connector. –  Connect battery → Electrical System; Rep. gr.27. –  Interrogate the fault memory → Chapter. –  Erasing fault memory → Chapter.