LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> Generator Noise Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine. Verify the noise can be heard. Compare the concern to a similar vehicle.
  2. Perform a charging system test. Verify that the generator is charging properly. Refer to Charging System Test .
  3. Inspect the generator, generator mounting, wiring harness, heater hoses, A/C lines or other accessory equipment that may be misrouted or be the cause of noise being transmitted into the passenger compartment.
  4. Ignition OFF, remove the engine drive belt. Verify the generator, A/C compressor and tensioner pulley spin freely.
    • If any of the pulleys do not spin freely, replace the affected component.
  5. Start the engine, with the drive belt removed. Verify that the noise goes away.
    • If the noise is still present, the generator is not the cause of the noise.
  6. Loosen all generator mounting bolts and ensure the generator is properly aligned. Tighten the mounting bolts to specification, refer to Generator Replacement .
scientia non olet · About LEMON Manuals