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Home >> Cadillac >> 2019 >> CTS Base, AWD >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System >> Diagnostic Information and Procedures >> Exhaust Flow Control System Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. Verify the exhaust flow control valves open and close when commanding the Exhaust Flow Control Valve On and Off with a scan tool.
    • If the exhaust flow control valves do not open and close 

      Refer to Circuit/System Testing

    • Go to next step: If the exhaust flow control valves open and close 
  3. All OK.
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