DME 7.8 DME 7.80 · Affected terminals

DME 7.8 DME 7.80 Affected terminals Terminal IV/31 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check both relays ♦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, plug IV wiring harness (DME control ⇒ Step 3 ness Pin 20, to relays for short module plug) → End to B+ ♦Remove relay stage 3 of coolant fan 1 ♦Remove relay stage 3 of coolant fan 2 ♦Measure voltage between spe- cial tool 9637 plug IV Pin 31 and ground ♦Ignition on 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 0-78 page 4 1908 P0482 p0482 Printed in Germany, 2000