DME 7.8 DME 7.8 0 · 0-85P0600

DME 7.8 DME 7.8 0 0-85P0600 236 CAN timeout Tiptronic - open circuit Diagnosis conditions • Vehicle with Tiptronic transmission • Battery voltage greater than 10 V • Ignition on Possible fault cause ♦Wiring harness ♦Tiptronic control module not connected ♦Tiptronic control module faulty Note! ♦If all CAN bus faults are stored, there must be a short circuit in the CAN bus wiring. ♦If one CAN bus fault is stored, the cruise control system is out of order. ♦CAN bus faults may be caused by a control module reset. The fault is then indicated as "Not present". Affected terminals Terminal II/3 and II/4 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check whether connector of Tiptronic control module is plugged ⇒ Step 2 in. 2 Check CAN bus from DME ♦Remove DME control module Repair wiring har- control module to Tip- connector ness tronic control module for → End ♦Remove Tiptronic control mod- continuity ule connector ♦Connect special tool 9637 to wiring harness (DME control module plug) ♦Measure resistance between 0 - 5 Ω special tool 9637 plug II Pin 3 and Tiptronic control module plug Pin 85 P0600 0-85 page 1 Printed in Germany, 2000 p0600