DME 7.8 DME 7.8 0 · 575 Coolant shutoff valve - above limit

DME 7.8 DME 7.8 0 575 Coolant shutoff valve - above limit Diagnosis conditions • Engine running • Battery voltage greater than 7 V Possible fault cause ♦Wiring harness ♦DME control module Affected terminals Terminal IV/40 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check wiring from DME ♦Connect special tool 9637 to 0 V Repair wiring har- control module to cool- wiring harness (DME control ⇒ Step 2 ness ant shutoff valve for short module plug) → End circuit to B+ ♦Remove connector of coolant shutoff valve ♦Measure voltage between spe- cial tool 9637 plug IV Pin 40 and ground ♦Switch on the ignition 2 Replace DME control module ⇒ Step 3 3 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 P1656 0-197 page 3 Printed in Germany, 2000 p1656