DME 7.8 DME 7.80 · 575 Coolant shutoff valve - below limit

DME 7.8 DME 7.80 575 Coolant shutoff valve - below limit Diagnosis conditions • Engine running • Battery voltage greater than 7 V • Coolant temperature greater than 90 °C or ATF temperature > 85 °C 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 ∞ Ω Repair wiring har- control module to colant wiring harness (DME control ⇒ Step 2 ness shutoff valve for short to module plug) → End ground ♦Remove connector of coolant shutoff valve ♦Measure resistance between special tool 9637 plug IV Pin 40 and coolant shutoff valve plug Pin 2 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 0-197 page 2 P1656 p1656 Printed in Germany, 2000