Nissan and Datsun Workshop Service and Repair Manuals

Check CVT fluid condition.
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If CVT fluid is very dark or smells burned, check operation of transaxle assembly. Flush cooling system after repair of transaxle assembly.

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If CVT fluid contains frictional material (clutches, brakes, etc.), replace radiator and flush cooler line using cleaning solvent and compressed air
after repair of transaxle assembly. See: Transmission and Drivetrain/Continuously Variable Transmission/Transaxle/Transmission Cooler/Service
and Repair/CVT Fluid Cooler Hose/Exploded View.