Circuit/System Verification

Ignition ON.
Test for greater than 12 V between the battery positive terminal and negative terminal.
- If 12 V or less
  Refer to Battery Inspection/Test .
- If greater than 12 V
Verify no DTCs are set.
- If any DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no DTCs are set
Verify the scan tool Stop/Start Select Switch parameter changes between Active and Inactive when pressing and releasing the ECO switch.
- If the parameter does not change
  Refer to Circuit/System Testing - ECO Switch Circuit Malfunction
- If the parameter changes
Verify the ECO switch indicator turns ON and OFF when commanding the Start/Stop Select Switch Indicator Active and Inactive with a scan tool.
- If the ECO switch indicator does not turn ON and OFF
  Refer to Circuit/System Testing - ECO Switch Indicator Circuit Malfunction
- If the ECO switch indicator turns ON and OFF
Verify the autostop and autostart functions are functioning properly while operating the vehicle under the conditions for entering a start/stop event.
- If the vehicle does not autostop or autostart
  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. These parameters will identify the specific cause for the autostop or autostart disable. Refer to the appropriate subsection and symptom when the cause is identified using the scan tool parameters.
- If the vehicle autostops and autostarts
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
- If the infotainment system remains active during a start/stop event
All OK.