ROD AS-HYDRAULIC CYLINDER 3240421 - Caterpillar

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(11) Service Code Indicator "SERV CODE".The ECM uses the main display module on the Caterpillar Monitoring System for showing diagnostic information to service personnel. Diagnostic information concerning the ECM is sent on the Cat Data Link to the Caterpillar Monitoring System. Service personnel must be familiar with the Caterpillar Monitoring System in order to troubleshoot the ECM. 250 mm (9.8425 inch)For troubleshooting the ECM, service personnel must place the Caterpillar Monitoring System in the Service Mode (mode 3). See Troubleshooting, "Using Caterpillar Monitoring System To Determine Diagnostic Codes".Caterpillar Electronic Technician (Cat® ET)
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Caterpillar Electronic Technician (Cat® ET) is a software program that is used to access data. The service technician can use the Cat® ET to perform maintenance work on the machine. Some of the options that are available with the Cat® ET are listed below:
View active and logged diagnostic codes.
Viewing active and logged event codes
View the status of parameters.
Clear active diagnostic codes and clear logged diagnostic codes
Perform calibration of machine systems.
Program the ECM (Flash) using the "WINflash" program. See Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program".
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.
Active diagnostic codes are displayed.
Logged diagnostic codes are displayed.Diagnostic Codes
An Electronic Control Module (ECM) monitors the circuitry between the ECM and the electrical components of the system. The ECM also monitors operating conditions. If the ECM detects a problem, a code is generated. There are two categories of codes:
Diagnostic Codes
Event CodesA diagnostic code indicates an electrical problem has been found in the wiring or in an electrical component.A logged diagnostic codes are provided to monitor diagnostic codes that are intermittent.
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Typical Cat® ET screen for logged diagnostic codesReference:
See Troubleshooting, "Diagnostic Code List" for the list of diagnostic codes for the ECM.See Troubleshooting, "Using Caterpillar Electronic Technician to Determine Diagnostic Codes". Diagnostic information is accessed with the following drop-down menus:Event Codes
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Typical Cat® ET screen for a logged event codeAn 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) - E followed by code number and warning level in parentheses. Example "E123 (2)"
A text description of the problem
The number of occurrences of the problem
Time stamped information for the first occurrence of the problem
Time stamped information for the last occurrence of the problem
Table 1
Event Codes For Transmission ECM (MID 81)    
Code (Level)     Description