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 MANUALSCHEVROLET2018TRAVERSE LS, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B245CCIRCUIT/SYSTEM TESTING
2018 Chevrolet Traverse LS, 4WD
Circuit/System Testing
2018 Chevrolet Traverse LS, 4WDSECTION Circuit/System Testing
- Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connector at the P50 Emergency/Call Backup Speaker. Ignition ON/Vehicle in Service Mode.
- Test for 5 - 7 V between each audio signal circuit terminal 1 and terminal 2 and ground.
- If less than 5 V
- Ignition OFF, disconnect the harness connector X1 and X2 at the K73 Telematics Communication Interface Control Module.
- Test for infinite resistance between the signal circuits and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- Go to next step: If infinite resistance
- 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 K73 Telematics Communication Interface Control Module.
- If greater than 7 V
- Ignition OFF, disconnect the harness connector X1 and X2 at the K73 Telematics Communication Interface Control Module. Ignition ON/Vehicle in Service Mode.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K73 Telematics Communication Interface Control Module.
- Go to next step: If between 5 - 7 V
- Test or replace the P50 Emergency/Call Backup Speaker.
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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.