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.

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.

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

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