Display showing Temp as -196; Bad ribbon cable

Potential Symptoms

  • Temp on the display is showing up as -196 which is a default of the controller when it is not seeing any temperature data.
  • Controller status in Venus 1500 shows temperature as -196.
  • Issue is not resolved with a replacement sensor but sensor is properly addressed and receiving proper voltage.
  • Controller shows a proper temp reading if ribbon cable between controller and QC is swapped with a known working ribbon cable (module to module).

Environment

  • Product Family: Message Displays
  • Product: Galaxy
  • Component: M2 Controller, CAN/Temp/Photo Sensor
  • Control System:

Cause

  • Ribbon cable between Quick Connect (QC) and controller has failed.

Resolution

  • Replace failed ribbon cable.

KB ID: DD3939375


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