Electrical - CEM DTC DD21/Alternator Not Charging
NO: 32-04DATE: 12-14-2005
MODEL:
S60, S80, V70, XC70, XC90 (excl. V8)
Model YEAR:
2005 & 2006
SUBJECT:
CEM DTC DD21 due to faulty LIN-network, Alternator Not Charging
REFERENCE:
VIDA
DESCRIPTION:
DTC CEM-DD21 may be set because of faulty communication between the Alternator and CEM due to the installation of extra LIN wiring for the upcoming BLIS, (Blind Spot Information System). Customers may also report an intermittent DIM message "POWER SYSTEM SERVICE REQUIRED" It may be possible that there is a pinched LIN-bus wire from the CEM to the BLIS-system between A-pillar body and the dashboard assembly on the left side. See details below under "SERVICE".
PRODUCT MODIFICATION:
A clip has been installed on the cars to prevent the LIN wire being pinched in production.
SERVICE:
Although BLIS (BLind spot Information System) has not been introduced yet, vehicles are pre-wired in production. The cables from CEM to RCM (Right Camera Module) and LCM (Left Camera Module) are present up to the mirror connector in both front doors.
The LIN-bus is also connected internally inside the CEM (see updated wiring diagram shown). When fault tracing a CEM-DD21, please assure that the RCM and LCM circuits are not overlooked. The BLIS circuits are not indicated in the Wiring Diagram for MY2005, but have been corrected for MY2006.
If there is a short to ground in the circuit from CEM D24, repair the affected wiring as necessary.
If the DTC CEM-DD21 remains, perform normal fault tracing for the DTC per VIDA instruction.
WARRANTY CLAIM INFORMATION