Fault table of LIN databus/control units for window control in the individual

doors

The table is used for determining faults of LIN data-bus (interruption or short circuit), if the window con-trol is restricted or fully non-operational.

Possible faults in the system of the window control with LIN databus cable:

01358

Switch for inside locking, driver's side

-E150-Implausible signal ♦ Cables or plug connections

de-fective

–

Check cables, plug connections

and fuses in accordance with the current flow diagram

♦ Switch -E150- defective

–

Replace switch

♦ Switch -E150- loose

–

Check switch fastening

–

Reading measured value block

⇒ 01-3 page 10 01359

Switch for inside locking, passen-ger's side

-E198-Implausible signal ♦ Cables or plug connections

de-fective

–

Check cables, plug connections

and fuses in accordance with the current flow diagram

♦ Switch -E198- defective

–

Replace switch

♦ Switch -E198- loose

–

Check switch fastening

–

Reading measured value block

⇒ 01-3 page 10 01362

Switch for tail-gate: sclose -F124-²⁾

Short circuit to earth

♦ Cables or plug connections de-fective

–

Check wiring and plug connec-tions according to the current flow diagram

♦ Resistance in lock control mech-anism or lock cylinder

–

Check lock control mechanism and ensure smooth operation

–

Replace lock cylinder

♦ Switch for tailgate -F124-

defec-tive

–

Replace switch for tailgate

-F124-♦ Switch for tailgate -F124- loose

–

Check switch fastening -F124-

–

Reading measured value block

⇒ 01-3 page 10 01389

Open switch for tailgate -F124-²⁾

Implausible signal ♦ Cables or plug connections

de-fective

–

Check wiring and plug

connec-tions according to the current flow diagram

Short circuit to earth

♦ Resistance in lock control

mech-anism or lock cylinder

–

Check lock control mechanism and ensure smooth operation

–

Replace lock cylinder

♦ Switch for tailgate -F124- defec-tive

–

Replace switch for tailgate

-F124-♦ Switch for tailgate -F124- loose

–

Check switch fastening -F124-

–

Reading measured value block

⇒ 01-3 page 10

1) A different Safe function is used in countries with special regulations.

2) Not fitted on FABIA.

Display on V.A.G. 1552 Possible cause of fault Rectifying fault

In the convenience sytem with LIN databus cable (win-dow control) 5 fault conditions must be distinguished:

♦ Short circuit of LIN databus to earth or positive

♦ No communication from control unit for window con-trol/driver door (problems with transmission or recep-tion wiring or databus interruprecep-tion between CU for window control/driver door and CU for window control/

other doors).

♦ No communication from control unit for window con-trol/front passenger door (problems with transmission or reception wiring or databus interruption between CU for window control/front passenger and CU for window control/other doors).

♦ No communication from control unit for window con-trol/door RL (problems with transmission or reception wiring or databus interruption between CU for window control/door RL and CU for window control/other doors).

♦ No communication from control unit for window con-trol/door RR (problems with transmission or reception wiring or databus interruption between CU for window control/door RR and CU for window control/other doors).

In case of fault finding (window control restricted or fully non-operational) it is required:

•

To disconnect battery for more than 30 seconds.

•

To deactivate child safety locks (must be inactive).

•

To close front doors (door contact switch in position disconnected).

•

To switch on ignition.

•

To initialise all windows (if possible).

♦ If the battery is disconnected and reconnected, carry out additional operations ⇒ Electrical System;

Rep. Gr. 27.

♦ All the possible faults which can occur during the com-munication among the control units for window control in the individual doors are listed below.

Note

♦ Full function: The control unit performs all operations of window control completely.

♦ Limited function: The control unit performs all operations of the window control except automatic lift/lower lift mech-anism.

♦ Emergency operation function: If there is no communication between the control unit and other control units, the window control only functions by means of a button on the relevant door without jamming protection. After 10 min-utes the control unit switches over to „No operation“.

♦ No operation: The control unit without operation and without communication with other control units. By resetting the control unit for more than 30 seconds, the control unit switches over to „emergency operation function“.

Resetting of the relevant door control unit is performed by disconnecting the plug connection at the relevant control unit for more than 30 seconds (voltage interruption).

Resetting of all door control units is performed by disconnecting the vehicle battery for more than 30 sec-onds.

If the battery is disconnected and reconnected, carry out additional operations ⇒ Electrical System; Rep. Gr. 27.

Conditions of control units for window control, door: Possible cause of fault Rectifying fault Driver's

side

Front pas-senger

Rear left Rear right Limited

♦ Short circuit of LIN da-tabus to earth or posi-tive

–

Check wiring and plug connections for short circuit according to the current flow diagram Full

♦ No communication from CU for window control/driver door

–

Check wiring and plug connections for inter-ruption according to the current flow dia-gram

–

Replace CU for win-dow control/driver door Full

func-tion

Emergency operation function

Full function Full function ♦ No communication from CU for window control/front passen-ger door

–

Check wiring and plug connections for inter-ruption according to the current flow dia-gram

–

Replace CU for win-dow control/front pas-senger door

Full func-tion

Full function Emergency operation function

Full function ♦ No communication from CU for window control/rl door

–

Check wiring and plug connections for inter-ruption according to the current flow dia-gram

–

Replace CU for win-dow control/rl door Full

func-tion

Full function Full function Emergency operation function

♦ No communication from CU for window control/rr door

–

Check wiring and plug connections for inter-ruption according to the current flow dia-gram

–

Replace CU for win-dow control/rr door

Note

Reading measured value block with LIN

In document Skoda Fabia - Workshop Manual (Page 53-56)