DME 7.8 DME 7.8 0 · 0-59P0413

DME 7.8 DME 7.8 0 0-59P0413 85 Electric change-over valve - open circuit Diagnosis conditions • Engine running • Battery voltage greater than 7 V Possible fault cause ♦Wiring harness ♦Electric change-over valve ♦DME control module faulty Note! The triggering wire for the electric change-over valve is monitored. Affected terminals Terminal III/14 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check voltage supply for ♦Remove connector of electric > 11 V Repair voltage sup- electric change-over valve change-over valve ⇒ Step 2 ply → End ♦Measure voltage between elec- tric change-over valve Pin 1 and ground ♦Switch on the ignition 2 Check electric change- ♦Remove connector of electric 30 Ω at 20 °C Replace electric over valve change-over valve ⇒ Step 3 change-over valve → End ♦Measure resistance at electric change-over valve between Pin 1 and Pin 2 3 Check wire from DME ♦Remove connector of electric 0 - 5 Ω Repair wiring har- control module, Pin III/14, change-over valve ⇒ Step 4 ness to electric change-over → End ♦Measure resistance between valve for continuity DME control module Pin III/14 and electric change-over valve plug Pin 2 2644 P0413 0-59 page 1 Printed in Germany, 2000 p0413