Corvette V8-5.7L VIN G (1997)
Engine Control Module: Service Precautions
USE OF CIRCUIT TESTING TOOLS
Do not use a test lamp in order to diagnose the Powertrain electrical systems unless specifically instructed by the diagnostic procedures. Use the
Connector Test Adapter Kit, J 35616 whenever diagnostic procedures call for probing any connectors.
PCM SERVICE PRECAUTIONS
The PCM is designed to withstand normal current draws associated with vehicle operations. Avoid overloading any circuit. When testing for opens or
shorts, do not ground any of the PCM circuits unless instructed. When testing for opens or shorts, do not apply voltage to any of the PCM circuits
unless instructed. Only test these circuits with a digital voltmeter J 39200 , while the PCM connectors remain connected.
AFTERMARKET (ADD-ON) ELECTRICAL AND VACUUM EQUIPMENT
Aftermarket (Add-On) Electrical and Vacuum Equipment is defined as any equipment installed on a vehicle after leaving the factory that connects to
the vehicle's electrical or vacuum systems. No allowances have been made in the vehicle design for this type of equipment.
CAUTIONS:
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Do not attach add-on vacuum operated equipment to this vehicle. The use of add-on vacuum equipment may result in damage to vehicle
components or systems.
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Connect any add-on electrically operated equipment to the vehicle's electrical system at the battery (power and ground) in order to prevent damage
to the vehicle.
Add-On electrical equipment, even when installed to these strict guidelines, may still cause the Powertrain system to malfunction. This may also
include equipment not connected to the vehicle's electrical system such as portable telephones and radios. Therefore, the first step in diagnosing any
Powertrain problem is to eliminate all aftermarket electrical equipment from the vehicle. After this is done, if the problem still exists, diagnose the
problem in the normal manner.
ELECTROSTATIC DISCHARGE DAMAGE
CAUTION: In order to prevent possible Electrostatic Discharge damage to the PCM, Do Not touch the connector pins or the soldered components on
the circuit board.
Electronic components used in the control systems are often designed in order to carry very low voltage. Electronic components are susceptible to
damage caused by electrostatic discharge. Less than 100 volts of static electricity can cause damage to some electronic components. There are several
ways for a person to become statically charged. The most common methods of charging are by friction and by induction. An example of charging by
friction is a person sliding across a car seat. Charging by induction occurs when a person with well insulated shoes stands near a highly charged object
and momentarily touches ground. Charges of the same polarity are drained off leaving the person highly charged with the opposite polarity. Static
charges can cause damage. Therefore, it is important to use care when handling and testing electronic components.
