Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2005V70 L5-2.4L TURBO VIN 54 B5244T5REPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSBODY CONTROL MODULETECHNICAL SERVICE BULLETINSCUSTOMER INTERESTCHARGING/COMPUTER CONTROLS - DTC CEM-DD21 STORED
2005 Volvo V70 L5-2.4L Turbo VIN 54 B5244T5
Charging/Computer Controls - DTC CEM-DD21 Stored
2005 Volvo V70 L5-2.4L Turbo VIN 54 B5244T5SECTION Charging/Computer Controls - DTC CEM-DD21 Stored
TIE - Technical Journal
Title OEM DTC DD21 due to faulty LIN-network, Alternator Not Charging
Ref No US16350.1.1 en-GB
Issuer -
Partner 3US7510 Volvo Cars North America
Func Group 7204
Func Desc
Statues Released
Status Date 2007-06-20
Issue Date 2007-06-18
Reference
Attachment
Vehicle Type
CSC
DTC
Text
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".
SERVICE:
See attachment.
Title OEM DTC DD21 due to faulty LIN-network, Alternator Not Charging
Ref No US16350.1.1 en-GB
Issuer -
Partner 3US7510 Volvo Cars North America
Func Group 7204
Func Desc
Statues Released
Status Date 2007-06-20
Issue Date 2007-06-18
Reference
Attachment
Vehicle Type
CSC
DTC
Text
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".
SERVICE:
See attachment.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.