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Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool LED Backlight Dimming Command parameter changes between a high percentage to a low percentage while operating the dimmer switch from high to low.
    • If the parameter does not change 

      Refer to Dimmer Switch Malfunction.

    • If the parameter changes 
  3. Verify the switch indicator amber LED's for the components listed below turn ON and OFF while turning the associated switches ON and OFF.
    • K33 HVAC Control Module
    • S48A Multifunction Switch - Instrument Panel
    • If any of the switch indicator amber LED's do not turn ON and OFF 

      Refer to Switch Indicator LED Backlighting Malfunction.

    • If all switch indicator amber LED's turn ON and OFF 
  4. Verify all backlighting components turn ON and OFF while commanding the LED Backlight Dimming ON and OFF with a scan tool.
    • If all backlighting components do not turn ON and OFF 

      Refer to Interior Backlighting Malfunction.

    • If all backlighting components turn ON and OFF 
  5. All OK.
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