12V Battery Message, and DTC CEM – B129F96 – 2016-2019 Volvo

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VOLVO CAR
SERVICE AND PARTS BUSINESS
Technical Journal
TITLE:
12V battery message, and DTC CEM – B129F96
REF NO:
TJ 34241.2.0
ISSUING DEPARTMENT:
Technical Service
CAR MARKET:
United States and Canada
PARTNER:
3 US 7510 Volvo Car USA
ISSUE DATE:
2019-05-15
STATUS DATE:
2019-05-28
FUNC GROUP:
3730
FUNC DESC:
Cable system, front Page 1 of 3
Produced in the USA and available as an electronic document. Hard copy documents are printed in USA on recycled paper containing
a minimum of 50% wastepaper and 10% post-consumer waste.
© 2019 VOLVO CAR USA, LLC
“Right first time in Time”
Attachment
File Name File Size
BCSM connectors TJ 34241.pdf 0.1298 MB
Vehicle Type
Type Eng Eng
Desc Sales Body Gear Steer Model Year Plant Chassis range Struc Week
Range
22X 2019-9999 – 201817-999952
23X 2017-9999 – 201617-999952
246 2018-9999 – 201717-999952
256 2016-9999 – 201552-999952
CSC Customer Symptom Codes
Code Description
LN Battery/Weak or low electrical power
LO Alternator and charge regulator/Power supply problems
VST Operation Number
VST Operation Number Description
36001-2 Diagnostic trouble codes read / reset / known Diagnostic trouble codes with VIDA
31106-2 Battery charging
Page 2 of 3 2019-05-28
Technical Journal 34241.2.0
DTC Diagnostic Trouble Codes
Control Module Code Fault Type
CEM B129F96 Permanent
Rows beginning with * are modified
Note! If using a printed copy of this Technical Journal, first check for the latest online version.
Text
DESCRIPTION:
*Vehicle Type 224 (S60) added.
DIM = Driver Information Module
CEM = Central Electronic Module
BCSM = Battery Control Switch Module
If the DIM message “12V battery charge fault” is displayed and DTC CEM – B129F96 is permanent,
please follow the instructions under “Service”.
SERVICE:
• Ensure that the main battery is charged and the alternator is charging.
• Check the voltage of the support battery and charge if necessary, if less than 11 volts it must be
removed from the vehicle and charged for 8 hours/overnight.
• Remove the lower connector (S) on the BCSM for 15 minutes (See attachment). This will reset the
BCSM and the internal flash memory.
• Reconnect the BCSM.
• Erase all DTC’s.
• Ensure that the stop/start sequences are working as intended and are repeatable, if the DTC does not
reoccur the vehicle is OK.
• If the DTC reoccurs please follow the instructions under Vehicle Report.
Warranty claim info:
To get warranty claim accepted for a job described in this TJ, please use following data:
VST OP number: 36001-2/31106-2 + applicable CSC.
VEHICLE REPORT:
Yes, please submit a TIE Vehicle Report if the service solution described in this TJ has no effect.
Use concern area “Vehicle Report” and sub concern area “Support needed”, use function group 3730 and
title the report with “BCSM TJ 34241”.
To view TJ attachment continue to next page. This TJ has one attachment.
2019-05-28 Page 3 of 3
Technical Journal 34241.2.0

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