Nissan Sentra B18 (2020-2025) Service Manual: Inspection

Inspection

WIND DEFLECTOR

Open glass lid fully.

Visually check for proper installation, damaged/deteriorated components, or foreign objects within mechanism. Correct as required for smooth operation.

Check for grease at the wind deflector arm (1) and pivot areas. If necessary, apply a sufficient amount of grease for non-binding operation.

: Front

Check that the wind deflector (1) moves freely within the moonroof unit assembly while manually pressing down and releasing. If a malfunction is detected, remove the moonroof unit assembly and visually inspect. If damage is found, replace either wind deflector (1) or moonroof unit assembly as required. Refer to Removal and Installation (WIND DEFLECTOR) or Removal and Installation (MOONROOF UNIT ASSEMBLY).

: Front

LINK AND WIRE ASSEMBLY

Before replacing a suspect part, make sure it is the source of noise being experienced.

Check link to determine if coating film has peeled off excessively enough that substrate is visible. Check also to determine if link is the source of noise. Replace as necessary.

Visually check to determine if a sufficient amount of grease has been applied to wire or rail groove. If not, add grease as required.

Check wire for any damage or deterioration. If any damage is found, replace moonroof unit assembly. Refer to Removal and Installation.

WEATHER-STRIP

Visually check weather-strip for damage, deterioration, or deformation.

• Open glass lid partially to inspect front edge of weather-strip.

• Tilt up glass lid fully to inspect sides and rear edge of weather-strip.

If any area of the weather-strip is found to be damaged, replace the glass lid. Refer to Removal and Installation.

Check for leakage around glass lid.

• Close moonroof lid assembly.

• Pour water around surface to determine area of concern.

  • For gaps or misalignment, adjust glass lid to specifications. Refer to Adjustment in this section.

  • For damaged sealing surfaces, either replace glass lid, refer to Removal and Installation or repair the panel, refer to Roof.

DRAIN HOSES

Remove the headlining. Refer to Removal and Installation.

Visually check drain hoses for:

• Proper connection at moonroof unit assembly and drain hose.

• Damage, pinch, cracks or deterioration.

• Proper fastening and routing on body panels.

Pour water through drain hoses to determine watertight performance.

If damaged or leaking portions in any drain hose is found, replace entire drain hose as necessary.

© 2014-2026 Copyright www.nisentra.com