Hybrid System - Intermittent No Start/Start/Stop Function
Vehicle sporadically fails to start or can no longer be startedTopic number LI54.10-P-054690
Version 1
Design group 54.10 Battery, voltage supply, voltage converter
Date 10-10-2012
Validity Models 221.095 and 221.195 (Hybrid)
Reason for change
Complaint:
^ Combustion engine sporadically fails to start.
^ Combustion engine can only be restarted after a waiting period of approx. one hour.
^ Combustion engine can no longer be started.
^ Start/stop function is sporadically unavailable (READY displayed in yellow in instrument cluster).
^ Fault code "current and stored" in electric motor control unit (SG-EM) (see control unit fault code).
Cause
Remedy:
Requirement:
^ Use Xentry Diagnostics/DAS version 05/2012 with add-on 2306 or a higher DAS/XENTRY version.
^ Use a battery charger to ensure that the voltage supply of the vehicle's on-board electrical system battery is sufficient (greater than 12.5V).
Work instructions
Symptoms
Control unit/fault code
Parts
WIS-References