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Home >> Cadillac >> 2019 >> CT6 V >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> Stop/Start System Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Verify no DTCs are set.
    • Go to next step: If no DTCs are set 
  2. Ignition ON.
  3. Verify the scan tool Stop/Start Select Switch parameter changes between Active and Inactive when pressing and releasing the Stop/Start switch.
    • If the parameter does not change 

      Refer to Circuit/System Testing - S48C Switch Circuit Malfunction

    • Go to next step: If the parameter changes 
  4. Verify the Stop/Start switch indicator turns ON and OFF when pressing and releasing the Stop/Start switch.
    • If the Stop/Start switch indicator does not turn ON and OFF 

      Refer to Circuit/System Testing - S48C Switch Indicator Circuit Malfunction

    • Go to next step: If the Stop/Start indicator turns ON and OFF 
  5. Verify the scan tool parameter:
    • Battery Sensor Module Battery State Information parameter reads Available.
    • Battery Sensor Module Reset Occurred - Using Estimated State of Charge reads No.
    • If not the specified value 
    1. Refer to Battery Sensor Module Learn 
    2. Test drive the vehicle. Verify the Stop/Start System is functioning correctly.
      • Go to next step: If No Conditions exists
    3. All OK.
    • Go to next step: If the Specified Value 
  6. Test for greater than 12 V between the battery positive terminal and negative terminal.
    • Go to next step: If greater than 12 V 
  7. Test drive the vehicle.

    Verify the Stop/Start System is functioning correctly.

    • If the vehicle does not autostop or autostart 
  8. Observe the scan tool Autostop Disable Reason, Autostop Inhibit Reason, Autostart Inhibit, and Autostart Reason parameters while operating the vehicle under the conditions for entering a start/stop event. Refer to Stop/Start Disable, Inhibit, and Restart Reasons . These parameters will identify the specific cause for the autostop or autostart disable.
    • Go to next step: If the vehicle autostops and autostarts 
  9. Verify the infotainment system remains active during a start/stop event.
    • If the infotainment system turns off or restarts during a start/stop event. 

      Refer to Circuit/System Testing - Power Supply Transformer Circuit Malfunction

    • Go to next step: If the infotainment system remains active during a start/stop event 
  10. All OK.
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