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 MANUALSVOLVO2017XC90 T8 EXCELLENCEREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALENGINE - DESIGN AND FUNCTIONELECTRIC REAR AXLE DRIVE (ERAD)
2017 Volvo XC90 T8 Excellence
Electric Rear Axle Drive, ERAD (Electric Rear Axle Drive)
2017 Volvo XC90 T8 ExcellenceSECTION Electric Rear Axle Drive (ERAD)
The Twin Engine is equipped with an ERAD which consists of:
- Electric motor
- Transmission
- Clutch
- Differential
- Drive shafts
ERAD is used for:
- Propulsion with only electric operation.
- Support in the event of large power drains and during AWD operation.
- Charging the battery during braking generation.
- Engine braking type properties when releasing the accelerator pedal.
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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.