Silicone Gelatin Pad Replacement
The Light Rain Sensor Module (LRSM) is equipped with a clear, silicone gelatin (SilGel) adhesive membrane that serves as an optical coupler between the sensor and the windshield glass. Extreme care must be exercised to protect this membrane from contamination before it is installed in the vehicle. The LRSM should always be serviced only in a dust-free environment. Do not touch the membrane with your fingers or tools. The membrane should only come into contact with the clean and dry inside surface of the glass within the mounting bracket bonded to the windshield. If contaminated, clean any foreign material from the windshield glass using rubbing alcohol and a lint-free cloth. A contaminated SilGel membrane will negatively impact LRSM performance.
When installing the replacement silicone gelatin (SilGel) adhesive membrane pad onto the Light Rain Sensor Module (LRSM), it is necessary to minimize air pockets trapped between the SilGel membrane and the LRSM. Excessive air pockets will negatively impact LRSM performance. It is important to adhere to the procedure steps in a deliberate manner to achieve satisfactory results.
- Carefully peel away the old silicone gelatin adhesive membrane pad (2) from the windshield (optics) side of the Light Rain Sensor Module (LRSM) (1).
- Thoroughly clean the windshield (optics) side of the LRSM using isopropyl alcohol and a clean, lint-free cloth.
- Using care not to contaminate, touch or damage the replacement pad, peel off the yellow protective foil.
- Looking through the transparent protective film (1), align and center the replacement pad (2) over the windshield (optics) side of the LRSM. Then use a slow, smooth and deliberate motion to roll the pad on the windshield (optics) side of the LRSM.
- With the transparent protective film still in place, use a thumb and a firm wiping motion to press the entire surface pad against the windshield (optics) side of the LRSM.
- To avoid contamination or damage of the replacement pad, do not remove the transparent protective film until just before installing the LRSM to the windshield. Refer to MODULE, LIGHT RAIN SENSOR, REMOVAL AND INSTALLATION .