Chevrolet Cobalt Service & Repair Manual: Engine Oil Light, Diagnosis & Testing

1. Understand and validate customer concern. Inspect visible system components for obvious damage or conditions that may cause concern.
2. Inspect for related bulletins, recall/field actions and preliminary information.
3. Verify symptom is not exclusively a mechanical concern.
4. Connect a suitably programmed scan tool, perform vehicle DTC Information function and verify at least one control module communicates with scan tool.
5. Verify there are no control module Internal hardware performance DTCs set.
6. Ignition ON, command MIL ON and OFF with scan tool. MIL should turn ON and OFF as commanded.
7. Ignition ON, command MIL ON and OFF with a scan tool while observing following control circuit status parameters:
  a. MIL control circuit low voltage test status.
  b. MIL control circuit open test status.
  c. MIL control circuit high voltage test status.
  d. Each parameter should toggle between OK and Not Run or Not Run and OK.
8. Ignition OFF, disconnect MIL electrical harness connectors. Ignition ON, MIL should not illuminate. If MIL is illuminated, test MIL control circuit terminal for a short to ground. If circuit tests normal, replace cluster.
9. Ignition ON, connect a 3A fused jumper wire between MIL control circuit terminal and ground. MIL should illuminate. If MIL does not illuminate, test MIL control circuit for a short to voltage, or an open/high resistance. If circuit tests normal, replace MIL bulb.
10. If all circuits/connections test normal, replace ECM.
    Electrical System, Inspection
    A visual inspection must always be performed to confirm the presence of aftermarket components, potential collision damage, or areas of concern. Ensure battery voltage is g ...

    Fog Lamp Bulb, Replace
    Warning: Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments. To help avoid personal injury: Turn off the lamp ...

    See also:

    Chevrolet Cobalt Owners Manual. Loss of Control
    Let us review what driving experts say about what happens when the three control systems—brakes, steering, and acceleration—do not have enough friction where the tires meet the road to do what the driver has asked. In any emergency, do not give up. Keep trying to steer and constantly seek ...

    Chevrolet Cobalt Owners Manual

    Chevrolet Cobalt Service Manual


    Copyright © 2024 www.cheviguide.com - Chevrolet Auto Manuals - 0.0037