Tip & How-To about Chevrolet 1500
Most vehicals manufactured after 1980 have some type of Check Engine Lamp. The lamp is a telltail signal initiated by the On Board Computer. The Computer recieves input signals from various sensors in the Fuel Management System. These inputs allow the On Board Computer to adjust it's Outputs to coinside with variables which may or not be within it's control. When the On Board Computer detects an input or output which contridicts normal known values, it turns on the Check Engine Lamp. The On Board Computer also sets (records) a fault code in it's memory, which should lead the repair technician to the proper area for diagnosis. Most vehicals with require a scan type tool to access the fault code. After the code is aquired diagnosis can begin.
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