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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC B361B: Head-Up Display Switch >> Component Testing

Component Testing

  1. Ignition OFF/Vehicle OFF, disconnect the harness connector at the S27 Head-Up Display Switch.
  2. Test for 3.4K - 4.2K Ω between the signal terminal 4 and the low reference terminal 3.
    • If not between 3.4 K - 4.2 KΩ 

      Replace the S27 Head-Up Display Switch.

    • If between 3.4 K - 4.2 KΩ 
  3. Test for 87 - 107 Ω between the signal terminal 4 and the low reference terminal 3 with the DIM + Switch pressed.
    • If not between 87 - 107 Ω 

      Replace the S27 Head-Up Display switch.

    • If between 87 - 107 Ω 
  4. Test for 291 - 356 Ω between the signal terminal 4 and the low reference terminal 3 with the DIM - Switch pressed.
    • If not between 291 - 356 Ω 

      Replace the S27 Head-Up Display switch.

    • If between 291 - 356 Ω 
  5. Test for 575 - 704 Ω between the signal terminal 4 and the low reference terminal 3 with the UP Switch pressed.
    • If not between 575 - 704 Ω 

      Replace the S27 Head-Up Display Switch.

    • If between 575 - 704 Ω 
  6. Test for 1 K - 1.2 KΩ between the signal terminal 4 and the low reference terminal 3 with the DOWN Switch pressed.
    • If not between 1 K - 1.2 KΩ 

      Replace the S27 Head-Up Display Switch.

    • If between 1 K - 1.2 KΩ 
  7. Test for 1.7 K - 2.1 KΩ between the signal terminal 4 and the low reference terminal 3 with the PAGE (or INFO) Switch pressed.
    • If not between 1.7 K - 2.1 KΩ 

      Replace the S27 Head-Up Display Switch.

    • If between 1.7 K - 2.1 KΩ 
  8. All OK.
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