Remove 2002 Remove Electronics Remove Technical
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Volvo AWD With Active On Demand Coupling

Tomorrow's Technician

Volvo used that ­viscous coupler setup until about 2002, and then started using a Haldex clutch system that was much more forgiving if the tires weren’t exactly matched. The first step is to connect a Vida or equivalent scan tool to see if you can communicate with the Differential Electronics Module (DEM).

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5 Painful Chevy Blazer 4WD Problems (+Reliable Solutions)

RepairSmith

Faulty transfer case shift motor: For an electronically operated transfer case, you should check the encoder motor (it directs your transmission to switch modes) and its wiring. But remember: It can be more effective to consult an expert for car troubles that require technical expertise, like servicing the transfer case.

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5 Painful Chevy Blazer 4WD Problems (+Reliable Solutions)

RepairSmith

Faulty transfer case shift motor: For an electronically operated transfer case, you should check the encoder motor (it directs your transmission to switch modes) and its wiring. But remember: It can be more effective to consult an expert for car troubles that require technical expertise, like servicing the transfer case.