DME 7.8 DME 7.8 0 · Work instruction

DME 7.8 DME 7.8 0 Work instruction Display OK If not OK 3 Check EVAP canister shut- ♦Remove EVAP canister shutoff Valve completely Valve stays closed off valve valve opened ⇒ Replace valve ⇒ Step 4 → End ♦Check if valve without flow is also completely opened 4 Check correct connec- ♦Get vehicle ready for operation A "major leak" is Fault "P0446" is tion of pressure sensor detected recorded again, (i.e. ♦Erase fault memory ⇒ Step 5 polarity reversal of ♦Unscrew tank cap pressure sensor) ♦Perform fuel tank leak test using ⇒ Connect pres- Porsche System Tester 2 sure sensor cor- rectly → End 5 Check EVAP canister ♦Check canister for ’blockage’ Canister is not Canister is ’blocked’ (with compressed air) ’blocked’ ⇒ Replace EVAP ⇒ Step 6 canister → End 6 Check vehicle history ♦Was the EVAP canister already YES: NO: (previous repairs) replaced (earlier) for this vehi- ⇒ Replace EVAP ⇒ Clean EVAP can- cle? canister shutoff ister shutoff valve valve and erase the fault → End memory → End 2093 P0446 0-P0446 page 3 Printed in Germany – 13, 2003 p0446