LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Information and Procedures >> DTC P0703: Brake Switch Signal Message Counter Incorrect >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

  1. Verify that no DTCs are set, except DTC P0703.
    • If only DTC P0703 is set 
  2. Replace the K9 Body Control Module.
  3. Verify DTC P0703 does not set when operating the vehicle within the conditions for running the DTC.
    • If the DTC sets 

      Replace the K20 Engine Control Module.

    • If the DTC does not set 
  4. All OK.