TJ34241.1.2-2018

VOLVO CAR
SERVICE AND PARTS BUSINESS
Technical Journal
TITLE:
12V battery message and DTC CEM-B129F96
REF NO:
ISSUING DEPARTMENT:
CAR MARKET:
TJ 34241.1.2
Technical Service
United States and Canada
PARTNER:
ISSUE DATE:
STATUS DATE:
3 US 7510 Volvo Car USA
2018-12-20
2018-12-20
FUNC GROUP:
FUNC DESC:
3730
Cable system, front
Page 1 of 3
“Right first time in Time”
Attachment
File Name
BCSM connectors TJ 34241.pdf
File Size
0.1298 MB
Vehicle Type
Type
Eng
Eng
Desc
Sales
Body
224
225
23X
246
256
Gear
Steer
Model Year
2019-9999
2019-9999
2017-9999
2018-9999
2016-9999
Plant
Chassis range
-
Struc Week
Range
201835-999952
201817-999952
201617-999952
201717-999952
201552-999952
CSC Customer Symptom Codes
Code
LN
LO
Description
Battery/Weak or low electrical power
Alternator and charge regulator/Power supply problems
VST Operation Number
VST Operation Number
31123-2
31124-3
Description
Battery Control Switch Module Reset Procedure
Battery Charging in Vehicle
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.
© 2018 VOLVO CAR USA, LLC
Technical Journal 34241.1.2
DTC Diagnostic Trouble Codes
Control Module
CEM
Code
B129F96
Fault Type
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:
If DIM message “12V battery charging fault” is displayed and DTC CEM-B129F96 is permanent, please
follow the instructions under “Service”.
DIM = Driver Information Module
CEM = Central Electronic Module
DTC = Diagnostic Trouble Code
SERVICE:
• Check that the main and secondary batteries are charged to at least 12.4 volts / 70%.
• 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 stop/start functions, if the DTC does not reoccur the vehicle is OK.
• If the DTC reoccurs please follow the instructions under Vehicle Report.
BCSM = Battery Control Switch Module
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.
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2018-12-20
Technical Journal 34241.1.2
2018-12-20
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