User's Manual

The status indicator for the MSS is mounted in the
dash of the machine near the keyswitch. The status
indicator will give basic information about the MSS to
the operator of the machine. The status indicator has
two colors: red and green.
i06222272
System Overview
SMCS Code: 7631
The machine security system (MSS) is designed to
restrict operation of a machine. A list of the
authorized electronic keys for a machine is contained
in the electronic control module (ECM) for the MSS.
Only a Cat
®
electronic key that is authorized can
disarm the MSS. Disarming is accomplished by
assigning the ID of an electronic key to the ECM for
the MSS. The Cat
®
Electronic Technician (Cat
®
ET)
service tool must be used to program the ECM with
the authorized keys.
When the exciter coil is used with MSS, the electronic
key is placed in the keyswitch of the machine and
turned to the ON position. The ECM will read the
unique ID that is stored in the key. The ECM will then
compare this ID to the list of authorized keys.
If the ID of the key that is read matches an authorized
key, the following actions will occur:
• The status indicator will turn a green color.
• The MSS will disarm allowing the machine to
operate.
If the ID of the key that is read does not match the list
in the ECM, the following actions will occur:
• The status indicator will become a red color.
• The MSS remains in the armed state.
• The machine will remain disabled.
Note: Ensure that you have only one electronic
key near the exciter coil when the MSS reads the
key. If more than one electronic key is near the
exciter coil, the MSS3s ECM will not read the key
and the machine will not start.
The machine security system can be installed in a
combination of ways:
1. Electronic Control
The MSS disables the machine by controlling up
to two devices (relays) that are used to power a
critical machine system.
2. Immobilizer
The MSS disables the machine by communicating
with other electronic control modules across the
J1939 CAN Data-Link and Cat
®
Data- Link (CDL)
by disabling critical machine functions.
To change the list of authorized keys or configuration
parameters, the user must have one of the following
items:
• Cat
®
Electronic Technician (Cat
®
ET) service tool
and a key with master access level for that specific
machine security system
• Cat
®
ET and a factory password
When a key with the master access level is not
available, a factory password is required to change
certain parameters in the configuration.
Refer to Testing and Adjusting, “Factory Password -
Obtain” for additional information on factory
passwords.
The Cat
®
ET screen for the factory level security
password will display the following parameters:
• ECM serial number
• Product ID (Serial number of the machine)
• Serial number of the service tool
• Reason code
• Total tattletale number
To obtain the proper passwords, the information must
be given to an authorized Cat
®
dealer.
If a key with the master access level for the machine
is not available, a factory password must be entered
before changes can be made. The following
information is needed before you call for a factory
password:
Table 1
Information That is Needed for the Factory Password
Product Identification
Software Part Number from
MSS3s ECM
Serial Number from ET
Tattletale
Reason Code 99
or
4
6 UENR7061
Systems Operation Section