Condition # 2

Condition #2

Some customers may comment on wind noise coming from the glass panel areas of the sunroof. This condition could also be reported as a HVAC blower motor whistle type noise that changes with HVAC blower fan speed.

Cause

This condition may be caused by one of more glass panels out of adjustment and not sealing properly.

Correction

VERIFY THE CUSTOMER CONCERN - Windnoise and/or HVAC blower/whistle type noise can vary depending on the blower fan speed setting. Higher fan speeds increase cabin pressure allowing more air flow out of the cabin through marginal sealing areas. To properly diagnose, it is important to know at what vehicle speeds and/or what fan speed settings the windnoise occurs. Another diagnostic method to detect panel to panel air leakage, while the vehicle is sitting in the service stall, is by tracing the perimeter of each glass panel with the open hose end portion of a stethoscope-type tool with all the vehicle doors and windows closed and the HVAC blower speed on high.

Figure 8





1. Install cross car foam to the first three glass panels of the module. The cross car foam is installed on the extruded glass reinforcement in the channel area (back of the glass panel on the inside). This is best done when the sunroof is open all the way. To install cross car foam, clean the extruded glass reinforcement channel with alcohol. Install the cross car foam in the channel area, centered from one end to the other on the first glass panel (refer to figure 8). Figure 8 shows the underside of the 1st panel with the foam strip added to the extruded glass reinforcement. This foam acts as a sound deadener

Important
The foam should be seated evenly in the channel and across the panel to ensure proper glass panel sealing.

2. Repeat the same for Panels 2 and 3.
Test drive the vehicle, and ONLY if the noise is still present perform the following taping diagnostic procedure to determine the source of leak and proper glass panel adjustment.

- Run a line of tape across the vehicle from module seal to front of first glass panel (refer to figure 9). Test drive. If the noise is gone, adjust the first glass panel downward to create a better seal per the procedure below.
Figure 9





- If the noise is still present, run a line of tape across the vehicle covering the back of the first glass to the front of second glass. If the noise is gone, adjust the second glass panel downward to create a better seal.
- If the noise is still present, run a line of tape across the vehicle covering the back of the second glass to the front of third glass. If the noise is gone, adjust the third glass panel downward to create a better seal.
- If the noise is still present, run a line of tape across the vehicle covering the back of the third glass to the front of fourth glass. If the noise is gone, adjust the fourth glass panel downward to create a better seal.

Glass Panel Adjustment Procedure

Adjust the glass panel downward one side at a time.

Notice
The first glass panel must be open to remove the actuator side covers; all others can be removed closed.

1. Remove side actuator covers. Use care when lifting up on the corners of the sunroof window actuator side cover to expose the screws. Use care not to break off the end tabs.
Figure 10





2. With the sunroof panels closed, loosen both actuator screws on the side of the glass panel to be adjusted (refer to figure 10).

Notice
Over compression of the seal may cause too much resistance on the seal to glass interface potentially causing false reversals when attempting to close sunroof.

3. Have someone from outside the vehicle lightly apply pressure downward on the center outer edge of the glass while the other person tightens the actuator screws on that side of the glass.
4. Test drive the vehicle to verify windnoise is eliminated. If not, repeat Steps 1 through 4 for the other side of the glass and/or for the other glass panels as necessary.
Figure 11

Figure 12





5. Cycle the roof to the full open and back to its closed position. Verify the glass panels are within the measurement specifications (refer to figures 11 & 12).

A = Gap between glass edge to metal roof edge. Panoramic Roof (Gap) 4.0+/- 1.5 mm (front). Panoramic Roof (Gap) 4.0 +/- 1.5 mm (Rear)

B = Gap between glass panels. 4.0 mm +/- 1.5 mm Glass gap between 1st & 2nd, 2nd & 3rd and 3rd & 4th panels.

Important
It is always desirable to have glass panels display a slight shingle effect (refer to figure 12).

Figure 13





Important
Keep in mind that some air leakage is normal at the T-joint areas and are there by design (refer to figure 13).