Trooper LS 2WD V6-3.5L (2001)
Engine Control Module: Service Precautions
Electrostatic Discharge (Esd) Damage
Electrostatic Discharge Damage
Electronic components used in the PCM 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
4000 volts for a person to feel even 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 induction.
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An example of charging by friction is a person sliding across a vehicle seat.
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Charge by induction occurs when a person with well insulated shoes stands near a highly charged object and momentary 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 PCM connector pins or soldered components on the PCM 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, 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.).
IMPORTANT: 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.
IMPORTANT: 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 P0601 indicates the check sum error.