UENR7061 (en-us) August 2016 Systems Operation Troubleshooting Testing and Adjusting MSS3s Machine Security System SAFETY.CAT.
i06558969 Important Safety Information Most accidents that involve product operation, maintenance and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards, including human factors that can affect safety. This person should also have the necessary training, skills and tools to perform these functions properly.
UENR7061 3 Table of Contents Table of Contents Systems Operation Section General Information ..............................................4 System Overview ..................................................6 Normal Operation..................................................7 Operation of Status Indicator..................................7 Key Information.....................................................8 Scheduled Access ( “Security System Bypass Times” ) ..............................................
UENR7061 Systems Operation Section Systems Operation Section i06222270 General Information SMCS Code: 7631 The Cat ® Machine Security System (MSS) discourages unwanted operation of a machine. The MSS uses the new Cat ® electronic key. The Cat ® electronic key contains an electronic chip. The electronic chip has a unique identification number (ID). An exciter coil is mounted around the key start switch. The exciter coil reads the ID of the key.
UENR7061 Systems Operation Section Illustration 1 g06065503 Machine security system (MSS3s) (1) SAE J1939 (2) Caterpillar Data Link (3) Machine Security System Standalone ECM (MSS3s) (4) MSS Status Indicator (5) MSS Software (6) Keyswitch (7) Exciter Coil (8) MSS Electronic Key (9) Battery 12V or 24V (10) Relay (11) Starter The MSS3s ECM for the machine security system is a hardened computer that is designed specifically for the MSS.
UENR7061 Systems Operation Section 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.
UENR7061 Systems Operation Section Note: The password may only be used for one programming session. A different password will be required after you exit the Cat ® ET screen. i06222274 Normal Operation SMCS Code: 7631 Reading the ID of a Key Before you can operate the machine, the MSS must identify a valid electronic key ID. The MSS identifies a valid electronic key ID via the exciter coil. Exciter Coil When the key is turned to the ON position, the MSS enters the read mode.
UENR7061 Systems Operation Section Status Indicator Illustration 2 g01002949 Typical installation of the Status Indicator (1) Status Indicator (2) Keyswitch with Exciter Coil The state of the MSS is displayed by the status indicator in accordance with Table 2 . The operator can use the status indicator to determine the status of the system or for troubleshooting. Table 2 Description Status Indicator Continuously Red The MSS is armed.(1) Continuously Green The MSS is disarmed.
UENR7061 9 Systems Operation Section 5. Set the internal clock. 6. Fleet configuration Note: Refer to the Testing and Adjusting, “Key Program” section for additional information on items 2.a, 2.b,2.c,3, 5, and 6. Refer to the Systems Operation, “System Disarm Feature” section for additional information on item 4. Note: A single electronic key can be used on as many machines with an MSS as desired. A separate key for every machine is not necessary. Key strategies will vary depending on machine fleet usage.
UENR7061 Systems Operation Section Note: If the machine is running when the expiration date and time are reached, the machine will continue to run. When the machine is shut down and the 30 second grace period has timed out, the machine will not be allowed to restart. i06222281 Table 4 shows an example of “Security System Bypass” . The “Start Time” is the time when the Machine Security System will disarm. The Machine Security System will return to the “armed” state at the “Stop Time” .
UENR7061 11 Systems Operation Section Active Diagnostics Active diagnostics indicate the presence of active diagnostic codes in the MSS. A diagnostic code informs the operator that a problem exists with the MSS. If the Cat service tool is available, the service tool can be used to display all active diagnostic codes. The service tool will also display codes that have been logged. Logged Diagnostics A logged diagnostic will record problems that are intermittent in the Machine Security System.
UENR7061 Systems Operation Section Table 5 Events that are logged by the Machine Security System EID E273 Description “Machine operation attempted using an invalid key” Possible Cause/Recommended Response Probable Cause: An unrecognized key has been used to start the machine. Recommended Action: Ensure that key list is up to date with all required keys. Probable Cause: Possible loss of key table.
UENR7061 13 Systems Operation Section Logged Events Illustration 3 g01097063 “Logged Event Codes” screen from theCaterpillar ® Electronic Technician for the Machine Security System Logged events provide a secure list of events that are critical to the security of the machine. The ECM for the MSS is used to store information about events. When an event is detected, the following information is logged: Note: The ECM will record a maximum of 127 occurrences of the events.
UENR7061 Systems Operation Section An Electronic Key with Standard Access Level and a Non-electronic Key • The table of the MSS keys can be viewed but the table cannot be modified. • The configuration settings of the MSS can be viewed but the settings cannot be modified. Electronic Key with Master Access Level A factory password or a master access level is needed to modify any settings through the service tool. • The settings for the MSS can be modified.
UENR7061 15 Systems Operation Section ECM Outputs Status Indicator The status indicator displays status of the system. The status indicator has three connections. One of the three connections is for a ground. Another connection is for the red LED. The third connection is for the green LED. Output Drivers Two output drivers are available to control relays or solenoids on the machine. Unless a valid “key ID” has been identified by the system, the drivers will remain without power.
UENR7061 Systems Operation Section Note: Ensure that you have only one electronic key near the exciter coil when the machine security system (MSS) reads the key. If more than one electronic key near the exciter coil, the MSS3s ECM will not read the key and the machine will not start. The exciter coil is connected to the harness via a 2pin connector and a length of wire. Status Indicator Illustration 6 g00862013 The state of the MSS is displayed by the status indicator.
UENR7061 17 Introduction Troubleshooting Section Introduction During troubleshooting, inspect all connections before any component is replaced. If the connections are not clean and tight, permanent electrical problems or intermittent electrical problems can result. Check that the wires are pushed into the connectors completely. Make sure that the connections are tight before other tests are made.
Introduction UENR7061 • The 20mA LED drivers share a separate return. • The exciter coil has a dedicated return that is not to be shared. Use the Machine Electrical Schematic, Parts Manual, and Operation and Maintenance Manual to locate electrical components and connectors. The following information is a guide to reading the tables on the back of the Electrical Schematic. • The “Component Location” table uses a numeric value for each component on the machine.
UENR7061 19 Introduction The Cat® Electronic Technician (Cat ET) Service Tool Illustration 7 g03861135 Connections for the Communication Adapter 3 and Cat ® Electronic Technician (Cat ET) Service Tool The components that are needed to use the Communication Adapter III and Cat ET to determine diagnostic codes are listed: (1) Cable (2) 317-7484 Communication Adapter Gp (3) 457-6114 CA3 Ethernet FLASH Cable (4) Current version of Cat ET program software and an IBM-COMPATIBLE personal computer Cat ® Elec
Introduction UENR7061 • The failures of the ECM system are displayed. • The status of most of the inputs and the outputs are displayed. • The settings for the ECM are displayed. • Display the status of the input and output parameters in real time. • Display the clock hour of the internal diagnostic clock. • The number of occurrences and the clock hour of the first occurrence and the last occurrence is displayed for each logged diagnostic code.
UENR7061 21 Introduction An indicator for logged events is provided. The indicator allows the service technician to track event codes that are intermittent. The data for the logged event will include the following information: • An event identifier (EID). • A text description of the problem. • The number of occurrences of the problem. • A time stamp will display the first occurrence of the problem. • A time stamp will display the last occurrence of the problem.
Introduction UENR7061 i06229353 Machine Preparation for Troubleshooting Personal injury can result if the machine moves while testing. SMCS Code: 7000-035 If the machine begins to move during test, reduce the engine speed immediately and engage the parking brake. Warnings Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.
UENR7061 23 Introduction b. Inspect the machine. Look for problems. Notice any unusual odors in the air. Listen for unusual noises. Complete the steps in Troubleshooting, “Visual Inspection”. If you complete the visual inspection and the problem is not identified, perform the appropriate tests and/or adjustments in Specifications, Systems Operation/Testing and Adjusting for your machine. 3. Troubleshoot the faults with the service codes Determine if the ECM has detected any faults.
