Skoda Workshop Service and Repair Manuals

Check dual spark ignition system with two ignition coils Special tools and workshop equipment required t  Voltage tester (e.g. - V.A.G 1527-) t  Test box -V.A.G 1598/22- t  Handheld multimeter (e.g. -V.A.G 1526 A-) t  Measuring tool set (e.g. -V.A.G 1594 A-) t  Current flow diagram Test conditions l  Battery voltage at least 11.5 volts l  Engine speed sender o.k., test → Chapter l  Hall sender o.k., test → Chapter Check the earth distribution of the power output stage   Note Ignition coils and power amplifier are a common component and cannot be replaced individually.

–  Unplug 4-pin connector -1- from the ignition coils -2-.

–  Connect voltage tester (earth), voltage tester must light up. –  If the voltage tester does not light up, check wiring according to current flow diagram and if necessary correct open ciruit → Current Flow Diagrams, Electrical Fault Finding and Fitting Locations. Check voltage supply of the ignition coils Inspection requirement:

l  Fuse 29 for ignition coils o.k. –  Unplug 4-pin connector from the ignition coils. –  Switch on ignition.

–  Connect voltage tester -V.A.G 1527- between engine mass and contact 2 of the plug (positive). Specified value: The voltage tester must light up. –  If the specified values are not reached, test the line interruption according to the current flow diagram, if necessary repair or test the fuse → Current Flow Diagrams, Electrical Fault Finding, Fitting Locations. Test control –  Unplug connectors from all four injectors. –  Switch on ignition. –  Voltage tester -V.A.G 1527- between engine mass and consecutively to contact 1 and 3. –  Operate starter for some seconds. While doing so the voltage tester must flash. –  Connect test box -V.A.G 1598/22 - at wiring loom to the engine control unit → Chapter.

–  If the voltage tester does not flash, check the wiring from plug for engine control unit for continuity or short circuit according to the current flow diagram (connect the test box -V.A.G 1598/22- to the wiring loom on the engine control unit). –  If necessary eliminate wire interruption or short-circuit.

Contact at 4-pin plug of power output stage		Contact at control unit plug
1		71
3		78

–  If no open circuit or earth was detected, replace the engine control unit → Chapter.