Skoda Workshop Service and Repair Manuals

Testing activated charcoal filter system solenoid valve 1 -N80- Special tools and workshop equipment required t  Vehicle system tester -V.A.G 1552 - with cable -V.A.G 1551/3- t  Test box -V.A.G 1598/22- t  Hand-held multimeter e.g. -V.A.G 1526 A - or multimeter -V.A.G 1715- t  Measuring tool set - V.A.G 1594 A- t  Current flow diagram Test conditions l  The fuse 132 in fuse holder on battery must be O.K.

l  Fuse no. 43 o.k. Check tightness In dead condition the solenoid valve is closed.

–  Detach hose -1- from activated charcoal filter solenoid valve 1 -2--N80-. –  Push auxiliary hose onto available valve connection. –  Insert plug to solenoid valve. –  Initiate an actuator diagnosis (function 03) and select the activated charcoal filter solenoid valve 1 -N80- → Chapter. –  Check the correct opening and closing of the solenoid valve by blowing into the auxiliary hose during the final control diagnosis, if necessary replace solenoid valve. Check solenoid valve -N80- (ACF valve)   WARNING To avoid damaging the electronic components, switch on the relevant measuring range before connecting the measuring cables and comply with the test conditions. –  Pull out plug at the ACF valve.

–  Perform a resistance measurement with the hand-held multimeter between the valve contacts. Specified value: 22...30 Ω. –  If the specified value is not reached, replace the ACF valve. Inspect ACF valve voltage supply   Note The voltage supply for the ACF valve is performed via the fuel pump relay. –  Pull out plug at the ACF valve.

–  Connect the voltage tester between contact 1 of the plug and the engine mass. –  Start engine. Specified value: The voltage tester must light up. –  If the voltage tester does not light up, check the wiring of contact 1 to fuse for continuity, if necessary repair.    → Current flow diagrams and Fitting locations –  If the wiring is o.k., test fuel pump relay → Chapter. Check actuation of ACF valve

–  Connect voltage tester between contact 2 and battery positive (+). –  Initiate an actuator diagnosis (function 03) and select the activated charcoal filter solenoid valve 1 -N80- → Chapter.   Note For this test, it is not necessary to remove the fuel pump relay and bridge the contacts. Specified value: The voltage tester must flash.

–  If the voltage tester does not light up or lights up continuously, connect test box -V.A.G 1598/22- at wiring loom to engine control unit. –  If the voltage tester lights up permanently, check the earth lead of contact 2 for short-circuit according to vehicle mass. –  If the voltage tester does not flash, check the wiring from contact 2 of the plug to bush 15 of the test box for open circuit as well as short-circuit to positive. –  If the cable is not found to be faulty, replace engine control unit → Chapter.