DME 7.8 DME 7.80 · ♦Relay faulty

DME 7.8 DME 7.80 ♦Relay faulty ♦DME control module faulty Affected terminals Terminal II/20 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check relay ♦Remove relay Approx. 75 Ω Replace relay ⇒ Step 2 → End ♦Measure resistance between Pin 85 and Pin 86 2 Check wiring from DME ♦Connect special tool 9637 to 0 V Repair wiring har- control module to relay wiring harness (DME control ⇒ Step 3 ness for short circuit to B+ module plug) → End ♦Remove relay ♦Measure voltage between spe- cial tool 9637 plug II Pin 20 and ground ♦Switch on the ignition 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 0-200 page 4 1981 P1674 p1674 Printed in Germany, 2000