Chevrolet Cobalt Service & Repair Manual: ATC Diagnosis & Testing
Chevrolet Cobalt Service & Repair Manual / Air Conditioning & Heater / Automatic Temperature Control Diagnosis & Testing / ATC Diagnosis & Testing
Accessing Diagnostic Trouble Codes
| Connect suitably programmed scan tool to the Data Link Connector (DLC) and follow manufacturer's instructions. |
Clearing Diagnostic Trouble Codes
| Connect a suitably programmed scan tool to Data Link Connector (DLC) and follow manufacturer's instructions. |
Intermittents
| Most intermittent conditions are caused by faulty electrical connections or wiring. Inspect for the following items: Wiring broken inside the insulation; poor connection between the male and female terminal at a connector; poor terminal to wire connection. Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire insulation rather than the wire itself, and corrosion in the wire to terminal contact area. Pierced or damaged insulation can allow moisture to enter the wiring causing corrosion. The conductor can corrode inside the insulation, with little visible evidence. Look for swollen and stiff sections of wire in the suspect circuits. Wiring which has been pinched, cut, or its insulation rubbed through may cause an intermittent open or short as the bare area touches other wiring or parts of the vehicle. |
ATC Component Diagnosis & Testing
For ATC system component testing
refer to "Climate Control Diagnosis & Testing" diagnostic test charts for
all component testing procedures.
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See also:
Chevrolet Cobalt Service & Repair Manual. Description
This ignition system uses one
coil for each pair of cylinders. Each pair of cylinders that are at Top
Dead Center (TDC) at the same time are known as companion cylinders. The
cylinder that is at TDC of its compression stroke is called the event cylinder.
The cylinder that is a ...
Chevrolet Cobalt Owners Manual
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