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 MANUALSCHEVROLET2015CRUZE ECO, AUTOMATIC TRANSREPAIR AND DIAGNOSISELECTRICALINSTRUMENT PANEL SYSTEM DISPLAYS AND GAUGESDIAGNOSTIC INFORMATION AND PROCEDURESCHIME MALFUNCTIONCIRCUIT/SYSTEM TESTING

2015 Chevrolet Cruze Eco, Automatic Trans

Circuit/System Testing

2015 Chevrolet Cruze Eco, Automatic TransSECTION Circuit/System Testing

NOTE: Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

Ignition ON, disconnect the harness connector at the S39 Ignition Switch while the ignition is ON.
Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
  Test for less than 2 Ω in the B+ circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
1. Test for infinite resistance between the B+ circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
2. Test for infinite resistance between the signal circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K9 Body Control Module.
- If the test lamp illuminates
Verify the scan tool Key in Ignition Status parameter is Inactive.
- If not Inactive
1. Disconnect the X3 harness connector at the K9 Body Control Module.
2. Test for less than 1 V between the signal circuit terminal 4 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the K9 Body Control Module.
- If Inactive
Install a 3 A fused jumper wire between the signal circuit terminal 4 and the B+ circuit terminal 2.
Verify the scan tool Key in Ignition Status parameter is Active.
- If not Active
1. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
2. 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 K9 Body Control Module.
- If Active
Test or replace the S39 Ignition Switch.

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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.