DME 7.8 DME 7.80 · Work instruction Display OK

DME 7.8 DME 7.80 Work instruction Display OK If not OK 3 Replace DME control module ⇒ Step 4 4 Perform adaptation ♦Switch on the ignition → End ♦Wait one minute ♦Do not press the accelerator ♦Switch off the ignition for at least 10 seconds ♦Read out the fault memory 497 Engine compartment purge fan output stage - short circuit to ground Diagnosis conditions • Engine running • Battery voltage greater than 7 V • Engine compartment purge fan switched on once • Engine compartment temperature greater than 75 °C • Front and rear lids closed Note! The triggering wire for relay terminal 85 is monitored. The rear lid may be opened to speed up the warming process. In order to proceed with the diagnosis, the rear lid must then be closed. Possible fault cause ♦Short circuit to ground ♦Relay faulty ♦DME control module faulty Affected terminals Terminal II/20 0-200 page 2 1981 P1674 p1674 Printed in Germany, 2000