Skoda Workshop Service and Repair Manuals

ABS/TCS/ESP BOSCH 8.0 Special tools and workshop equipment required t  Diagnostic unit -VAS-   Note When using the diagnostic unit -VAS- the electrical test is integrated in the „Targeted fault finding“. Dash panel insert

Different versions of the dash panel insert according to the vehicle equipment → electronic catalogue of original parts Warning lights

Pos.	Denomination
1	Dual circuit and hand brake system warning light -K7-
2	Traction control system warning light -K86- ESP and TCS warning light -K155-
3	Brake pad warning light -K32-
4	ABS warning light -K47-
5	Warning light for tyre pressure display -K220-

Brake pad warning light - K32- (-3-) t  If the brake pad warning light - K32- (-3-) does not go out after switching the ignition on or glows during the driving operation, the following can be the causes of the fault: a -  the brake pads could be worn down. –  Check the brake pads on the front and rear axles. The brake pads must be replaced, if they are worn out → Chapter. b -  there is a fault in the wiring → Current flow diagrams, Electrical fault finding and Fitting locations

ABS warning light -K47- (-4-) t  If the ABS warning light -K47- (-4-) does not go out after the ignition is switched on and after completion of the test sequence, the causes of the fault may be as follows: a -  the supply voltage is less than 11 V. b -  an ABS fault is present.   WARNING If an ABS fault -b- is present, the anti-lock brake system remains switched off while the conventional brake system remains fully operational. c -  a sporadic fault exists on a wheel speed sensor after the last vehicle start (sporadic fault). In this case of the fault on the wheel speed sensor the ABS warning light - K47- goes out automatically after restarting the vehicle and after a speed above 20 km/h is reached. d -  the connection from the dash panel insert to the ABS control unit -J104- (databus) is interrupted → Current flow diagrams, Electrical fault finding and Fitting locations e -  The dash panel insert is defective.

ABS warning light -K47- (-4-) and dual circuit and hand brake system warning light -K7- (-1-) t  If the ABS warning light -K47- (-4-) goes out or the dual circuit and hand brake system warning light -K7- (-1-) lights up or flashes, the causes of the fault may be: a -  the hand-brake is still applied (warning light lights up). b -  the brake fluid level is too low (warning light flashes). c -  there is a fault in the wiring between dash panel insert and brake fluid level warning contact -F34- → Current flow diagrams, Electrical fault finding and Fitting locations. t  If the ABS warning light - K47- (-4-) and the dual circuit and hand brake system warning light -K7- (-1-) light up, then the ABS and EBD system (Electronic Brake pressure Distribution) are defective. One must reckon with a somewhat changed braking characteristic.   WARNING Once the ABS warning light - K47- and the dual circuit and hand brake system warning light -K7- have lit up then one can expect the rear wheels to lock quite early on when braking.

ABS warning light -K47- (-4-), dual circuit and hand brake system warning light -K7- (-1-), traction control system warning light -K86- (-2-) and ESP and TCS warning light - K155- (-2-) t  If the ABS warning light -K47- (-4-) and the dual circuit and hand brake system warning light -K7- (-1-) go out, but the traction control system warning light -K86- (-2-) or the ESP and TCS warning light -K155- (-2-) remain lit, the causes of the fault may be: a -  Fault relates only to TCS or ESP. b -  ASR is switched off with traction control system switch -E132- or with TCS and ESP button -E256-. c -  TCS or ESP is in regulating mode (flashing rhythm 3x per second). d -  Short-circuit to positive in traction control system switch -E132- or in TCS and ESP switch -E256- (warning light goes out after approx. 5 minutes).

Warning light for tyre pressure display -K220- (-5-) t  Warning light for tyre pressure inspection display -K220- (-5-) comes on: –  Carry out tyre pressure inspection. –  Correct the nominal pressure of the tyre. –  Perform basic setting. Initiating basic setting: l  Ignition on

–  Press the button for tyre pressure inspection -E226--arrow- for more than 2 seconds. The button is located in the left centre console of the hand-brake lever. When the button for tyre pressure inspection -E226- is pressed the warning light for tyre pressure inspection display -K220- lights up in the dash panel insert. The basic setting is confirmed with an acoustic signal. –  Switch off ignition. –  After the ignition is switched on again, the warning light for tyre pressure inspection display -K220- does no longer light up. t  Warning light for tyre pressure inspection display -K220- flashes: –  Carry out tyre pressure inspection. –  Correct the nominal pressure of the tyre. l  Ignition on

–  Press simultaneously the button for tyre pressure inspection -E226--arrow- and the TCS and ESP button -E256- or traction control system switch -E132- for more than 2 seconds (Fitting location of the button: in the left centre dash panel next to the heater control). If the warning light for tyre pressure inspection display -K220- continues to flash: –  Carry out „Targeted fault finding“ with vehicle diagnosis, measurement and information system -VAS- → Chapter.