Programmable Parameters
Certain parameters that affect engine operation may
be changed with the electronic service tool. The
parameters are stored in the ECM, and the
parameters are protected from unauthorized changes
by passwords. These parameters are either system
configuration parameters or customer parameters.
System configuration parameters are set at the
factory. System configuration parameters affect
emissions or power ratings. Factory passwords must
be obtained and factory passwords must be used to
change the system configuration parameters.
Some of the parameters may affect engine operation
in an unusual way. An operator might not expect this
type of effect. Without adequate training, these
parameters may lead to power complaints or
performance complaints even though the engine
performance is within the specification.
Customer parameters can be used to affect the
characteristics of the engine. Limits are set by the
factory and by the monitoring system.
Customer passwords may be required to change
customer specified parameters.
Refer to Troubleshooting, “Configuration Parameters”
for additional information on this subject.
Passwords
System configuration parameters are protected by
factory passwords. Factory passwords are calculated
on a computer system that is available only to
Perkins dealers and distributors. Since factory
passwords contain alphabetic characters, only the
electronic service tool can be used to change system
configuration parameters.
Customer parameters can be protected by customer
passwords. The customer passwords are
programmed by the customer. Factory passwords
can be used to change customer passwords if
customer passwords are lost.
Refer to Troubleshooting, “Customer Passwords”
and Troubleshooting, “Factory Passwords” for
additional information on this subject.
UENR4469-36 11
Electronic System Overview
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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