Technical Service Bulletins

Volvo won’t go to sleep

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Volvo won’t go to sleep

Battery drainage can occur on vehicles equipped with Active Suspension and subwoofer prep if the connectors for the SUM (Suspension Module) and the prewired SUB (Subwoofer) are swapped.

The SUM will remain active and the current draw will be approximately 80 – 400 mA. The vehicle will not go into sleep mode, as there will be activity on HS CAN (High Speed CAN network). The connectors for SUM and SUB are in close proximity to one another and are physically interchangeable.

NOTE: Subwoofers are not installed in all vehicles and the connector is, in most cases, unused.

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