45-47Fault code 5523 · DME: CAN message missing 2

911 Turbo (996) PSM 05 45 45-47Fault code 5523 DME: CAN message missing 2 Diagnostic conditions • Engine running • No CAN message from the DME control module Possible cause of fault ♦DME control module disconnected ♦CAN bus connection faulty ♦DME control module faulty Affected terminals Terminals 24, 40 Diagnosis/troubleshooting Note! Before troubleshooting, read out the fault memory of the DME con- trol module and eliminate any faults present. Work instruction Display OK If not OK 1 Check CAN bus from DME ♦Switch off ignition < 5 Ω Open circuit contol unit to PSM control ⇒ Step 2 between DME con- ♦Pull plug off PSM control module unit for open circuit trol module pin D36 and Tiptronic control module and PSM control ♦Measure resistance between module pin 24 DME control module plug pin → End D36 and PSM control module plug pin 24 2 Check CAN bus from DME ♦Measure resistance between < 5 Ω Open circuit contol unit to PSM control DME control module plug pin ⇒ Step 3 between DME con- unit for open circuit D37 and PSM control module trol module pin D37 plug pin 40 and PSM control module pin 40 → End 3 Replace DME control module → End 4503 Fault code 5523 45-47 page 1 Printed in Germany – 5, 2001 5523ps05