DME 7.8 DME 7.8 0 · 0-67P0444

DME 7.8 DME 7.8 0 0-67P0444 98 EVAP canister purge valve - open circuit Diagnosis conditions • Engine running • Battery voltage greater than 7 V Possible fault cause ♦Wiring harness ♦EVAP canister purge valve ♦DME control module Affected terminals Terminal III/3 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check voltage supply for ♦Remove connector of EVAP can- > 11 V Repair voltage sup- EVAP canister purge valve ister purge valve ⇒ Step 2 ply → End ♦Measure voltage between EVAP canister purge valve plug Pin 1 and ground ♦Switch on the ignition 2 Check EVAP canister ♦Remove connector of EVAP can- 26 ± 4 Ω Check EVAP canis- purge valve ister purge valve (at 20 °C) ter purge valve ⇒ Step 3 → End ♦Measure resistance between EVAP canister purge valve Pin 1 and Pin 2 3 Check triggering wire for ♦Remove connector of EVAP can- 0 - 5 Ω Repair wiring har- EVAP canister purge valve ister purge valve ⇒ Step 4 ness → End ♦Connect special tool 9637 to wiring harness (DME control module plug) ♦Measure resistance between EVAP canister purge valve Pin 2 and special tool 9637 Pin III/3 2023 P0444 0-67 page 1 Printed in Germany, 2000 p0444