Four Quadrant Sun Sensor (B32/2)

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Back to: WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)

Location - Four Quadrant Sun Sensor (B32/2)

The Four Quadrant Sun Sensor (B32/2) is located on the front hood/bonnet near the windscreen.

W220 2003 ACC Four Quadrant Sun Sensor (B32 2).JPG

Testing - Four Quadrant Sun Sensor (B32/2)

  • Place four pieces of masking tape over each quadrant of the Four Quadrant Sun Sensor B32/2.
  • Monitor the Diagnostic Parameter values for each quadrant via the ACC Pushbutton Control Module (N22).
  • Be warned that accessing the hidden ACC Service Menus requires some technical experience.
  • See full details Automatic Climate Control (ACC) Service Menus.
  • Press Residual Heat and Ventilation (REST) button alone for greater than five seconds with ignition on (position 2) or with engine running.
  • Record the Diagnostic Parameter values for each quadrant (NR.11: - FL, NR.12: - FR, NR.13: - RR, NR.14: - RL).
  • Remove various pieces of masking tape to expose each quadrant to sunlight and repeat measurement.

Test Results - Four Quadrant Sun Sensor (B32/2)

The following results were obtained in the shade with slightly transparent blue masking tape.

W220 2003 ACC Four Quadrant Sun Sensor (B32 2) Test Results.JPG

BenzWorld Member Experience with Four Quadrant Sun Sensor (B32/2)

"After having a problem with my A/C for two years, and blowing more than $2,0000.00 with the Mercedes-Benz Dealership to fix it, only to figure it out on my own, I thought I would update everyone with the hope that it can help others."

Refer to: http://forums.mbworld.org/forums/s-class-w220/198351-2000-s430-climate-control-problem.html