Chevrolet Cobalt Service & Repair Manual: Precautions
Air Bag Systems
| Refer to "Air Bag System Precautions"
on main menu selection for "Precautions." |
Battery Ground Cable
| Prior to service, disconnect battery
ground cable and isolate as required. |
Electrical Service
| Because of the electronic system
control and low system voltages, certain precautions must be taken to ensure
accurate diagnosis and avoid system damage. Do not disconnect or connect
electrical connectors with ignition On unless specifically instructed. Do
not connect test equipment directly to the Engine Control Module (ECM),
except where noted and never attempt to measure oxygen sensor output because
the sensor will be damaged. |
Fuel System Pressure Relief
| 1. |
Loosen fuel fill cap to relieve fuel
tank vapor pressure. |
| 3. |
Remove fuel rail service port cap,
then wrap a shop towel around fuel rail service port. |
| 4. |
Depress (open) fuel rail test port
valve using a small flat-bladed tool. |
| 5. |
Remove shop towel from around fuel
rail service port, and place in an approved gasoline container. |
| 6. |
Install fuel rail service port cap
and engine cover. |
|
Engine Control Module (ECM)
1.
Retrieve percentage of remaining engine
oil life using a scan tool, then record remaining engine oil life.
2.
...
Accessing Diagnostic Trouble Codes
Connect a suitably programmed
scan tool to Diagnostic Link Connector (DLC) and follow manufacturer's instructions.
Wiring Diagrams
Refe ...
Chevrolet Cobalt Owners Manual
Chevrolet Cobalt Service Manual
Component Service
Diagnosis & Testing