SHAFT 2G9818 - Caterpillar

Cat Electronic Technician is software that is used to access, monitor and sometimes change the data that an ECM uses to control a machine system. The service technician can use the Cat ET to perform maintenance on the machine. Some of the options that are available with the Caterpillar Electronic Technician are listed below:
Viewing the active event codes and logged event codes
View the status of parameters.
Clear active diagnostic codes and clear logged diagnostic codes
Perform calibrations of machine systems.
Program the ECM (Flash) using the "WINflash" program. See Troubleshooting, "ECM - Software Install".
Print reports.The following list contains some of the diagnostic functions and programming functions that are performed by the service tools.
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.
The definition for each logged diagnostic code and each event is displayed.
Load new FLASH software.See Troubleshooting, "Diagnostic Code List" for the list of diagnostic codes for the ECM.
Active diagnostic codes
Logged diagnostic codesActive Diagnostic Codes
Illustration 4 g03644579
Cat ET screen for Active Diagnostic codes
The following procedures may cause new diagnostic codes to be logged. Therefore, before any procedures are performed, make a list of all the active diagnostic codes to determine the system problems. Clear the diagnostic codes that were caused by the procedure, when each procedure is complete.Note: Before performing a procedure, always check all the circuit breakers. Repair the cause of any circuit breaker that is tripped.A screen is provided in Cat ET for active diagnostic codes. The screen will display the diagnostic codes that are active. Active diagnostic information shall include a component identifier (CID), a failure mode identifier (FMI), and a text description of the problem.Logged Diagnostic Codes
Illustration 5 g03644835
Cat ET screen for Logged Diagnostic codes
A screen is provided in Cat ET for logged diagnostic codes. The screen will display diagnostic codes that are logged. The Cat ET will log diagnostic codes that are intermittent. The logged diagnostic data shall include a component identifier (CID), a failure mode identifier (FMI), and a text description of the problem. Also, the logged diagnostic data shall include the number of occurrences of the problem and two time stamps. The time stamp displays the first occurrence of the problem and the time stamp displays the most recent occurrence of the problem.Diagnostics are logged in non-volatile memory. On powerup, the ECM will clear any diagnostic codes that have not been detected or active within the last 150 hours of machine operation.Electronic Service Tool Will not Communicate with ECM
Probable Causes
Configuration for the communications adapter
J1 connectors for the other control modules
Communication adapter and/or cables
Electrical power supply to the service tool connector
Caterpillar Electronic Technician (ET) and related hardware
Electrical power supply to the ECM
Override switches
J1939 Data LinkRecommended Actions:
1. Electrical Power Supply to the