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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 92 (DRIVER ASSISTANCE SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B356ACIRCUIT/SYSTEM TESTING
2019 Chevrolet Trax Premier, AWD
Circuit/System Testing
2019 Chevrolet Trax Premier, AWDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, remove the ignition key, open the driver door, disconnect the scan tool, all vehicle systems OFF, this may take up to 2 min. Disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
- Test for less than 10 Ω between the ground circuit terminal 3 and ground.
- If 10 Ω or greater
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground connection.
- Go to next step: If less than 10 Ω
- Ignition ON.
- Verify the scan tool Lane Departure Warning Switch Status parameter is Off.
- If not Off
- Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
- Test for infinite resistance between the signal circuit terminal 5 at the S48D Multifunction Switch 2 - Instrument Panel and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the K109 Frontview Camera Module.
- Go to next step: If Off
- Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground circuit terminal 3.
- Verify within 10 s the scan tool Lane Departure Warning Switch Status parameter is On.
- If not On
- Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
- Test for less than 1 V between the K109 Frontview Camera Module signal circuit terminal 5 and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- Go to next step: If less than 1 V.
- Test for less than 2 Ω in the signal circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K109 Frontview Camera Module.
- Go to next step: If On
- Test or replace the S48D Multifunction Switch 2 - Instrument Panel.
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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.