Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2019TRAX PREMIER, AWDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERBATTERY, CHARGING SYSTEM AND STARTING SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESSTOP/START SYSTEM MALFUNCTION (WITHOUT LE2)CIRCUIT/SYSTEM VERIFICATION

2019 Chevrolet Trax Premier, AWD

Circuit/System Verification

2019 Chevrolet Trax Premier, AWDSECTION Circuit/System Verification

Ignition ON.
Verify no DTCs are set.
- If any DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTCs are set
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 .
- Go to next step: If greater than 12 V
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. Disconnect and reconnect the C1 Battery Negative cable.
  NOTE:
  Allowing the vehicle to sit undisturbed for 3 h will automatically perform a Battery Sensor Learn upon the next engine cranking event. This will allow the battery state of charge to be relearned.
2. Wait a minimum of 3 hours.
3. Start the engine.
4. Test drive the vehicle.
  Verify the Stop/Start System is functioning correctly.
  - if a condition exists
    Refer to Stop/Start Disable, Inhibit, and Restart Reasons
  - Go to next step: If No Conditions exists
5. All OK.
- Go to next step: If the Specified Value
Test drive the vehicle.
Verify the Stop/Start System is functioning correctly.
- if a condition exists
  Refer to Stop/Start Disable, Inhibit, and Restart Reasons
- Go to next step: If No Conditions exists
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
All OK.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.