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 MANUALSVOLVO2010XC70 AWD L6-3.2L VIN 96 B6324S2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTCHARGING SYSTEM - REDUCED ALTERNATOR PERFORMANCE
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2
Charging System - Reduced Alternator Performance
2010 Volvo XC70 AWD L6-3.2L VIN 96 B6324S2SECTION Charging System - Reduced Alternator Performance
Title Reduced Alternator Performance Due to Incorrect Installation of Accessories
Ref No US24495.1.0 en-GB
Issuer -
Partner 3 US 7510 Volvo Cars North America
Func Group 3200 Func Desc alternator and charge regulator
Status Released
Status Date 2011-04-15
Issue Date 2011-04-13
Reference wiring diagrams
Attachment
Vehicle Type
CSC
DTC
Text
DESCRIPTION:
If aftermarket electrical accessories are installed it is very important that the accessories ground connection is connected after the BMS (battery monitoring sensor) and NOT at the battery negative post.
If the negative post at the battery is used as ground connection before the BMS for the accessories there is a risk that the BMS will give incorrect values to the alternator and the alternator charging may be reduced as a result.
Suggestions for alternative ground connections.
P3x platform: Ground connection: 31/AL
P1x platform: Ground connection: 31/110, 31/112, 31/114
Please refer to the appropriate wiring diagram for the locations of these connections.
Ground screw part number: 999231
Ref No US24495.1.0 en-GB
Issuer -
Partner 3 US 7510 Volvo Cars North America
Func Group 3200 Func Desc alternator and charge regulator
Status Released
Status Date 2011-04-15
Issue Date 2011-04-13
Reference wiring diagrams
Attachment
Vehicle Type
CSC
DTC
Text
DESCRIPTION:
If aftermarket electrical accessories are installed it is very important that the accessories ground connection is connected after the BMS (battery monitoring sensor) and NOT at the battery negative post.
If the negative post at the battery is used as ground connection before the BMS for the accessories there is a risk that the BMS will give incorrect values to the alternator and the alternator charging may be reduced as a result.
Suggestions for alternative ground connections.
P3x platform: Ground connection: 31/AL
P1x platform: Ground connection: 31/110, 31/112, 31/114
Please refer to the appropriate wiring diagram for the locations of these connections.
Ground screw part number: 999231
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.