Trooper LS V6-3.5L (1998)
Engine Control Module: Service Precautions
Electrostatic Discharge (ESD) Damage
Electronic components used in the control systems are often designed 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. By comparison, it takes as
much as 4,000 volts for a person to even feel the zap of a static discharge.
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.
NOTE: To prevent possible Electrostatic Discharge damage, follow these guidelines:
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Do not touch the control module connector pins or soldered components on the control module circuit board.
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Do not open the replacement part package until the part is ready to be installed.
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Before removing the part from the package, ground the package to a known good ground on the vehicle.
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If the part has been handled while sliding across the seat, or while sitting down from a standing position, or while walking a distance, touch a
known good ground before installing the part.
NOTE: To prevent internal PCM damage, the ignition must be in the "OFF" position in order to disconnect or reconnect power to the PCM (for
example: battery cable, PCM pigtail, PCM fuse, jumper cables, etc.).
IMP0RTANT: When replacing the production PCM with a service PCM, it is important to transfer the broadcast code and production PCM
number to the service PCM label. This will allow positive identification of PCM parts throughout the service life of the vehicle. Do not record this
information on the metal PCM cover.
IMP0RTANT: The ignition should always be in the "OFF" position in order to install or remove the PCM connectors.
Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for the
PCM to be replaced, the PCM should be checked first to ensure it is the correct part. If it is, remove the faulty PCM and install the new service PCM.
The service PCM EEPROM will not be programmed. DTC P06O1 indicates the check sum error.
The PCM is designed to withstand normal current draws associated with vehicle operation. Avoid overloading any circuit. When testing for opens and
shorts, do not ground or apply voltage to any of the PCM's circuits unless instructed to do so. These circuits should only be tested using digital
voltmeter J 39200. The PCM should remain connected to the PCM or to a recommended breakout box.
Do not use a test light to diagnose the powertrain electrical systems unless specifically instructed by the diagnostic procedures. Use Connector Test
Adapter Kit J 35616 whenever diagnostic procedures call for probing connectors.
