SEAL AS 3081883 - Caterpillar

Table 1
Diagnostic Codes Table    
Code and Description     Conditions which Generate this Code     System Response    
254-0 Electronic Control Module : High     The ECM is not responding correctly.     The code is logged.    
254-1 Electronic Control Module : Low    
254-2 Electronic Control Module : Erratic, Intermittent, or Incorrect    
254-3 Electronic Control Module : Voltage Above Normal    
254-4 Electronic Control Module : Voltage Below Normal    
254-5 Electronic Control Module : Current Below Normal    
254-6 Electronic Control Module : Current Above Normal    
254-7 Electronic Control Module : Not Responding Properly    
254-8 Electronic Control Module : Abnormal Frequency, Pulse Width, or Period    
254-9 Electronic Control Module : Abnormal Update Rate    
254-10 Electronic Control Module : Abnormal Rate of Change    
254-11 Electronic Control Module : Other Failure Mode    
254-12 Electronic Control Module Error    The ECM contains no moving parts. Replacement of the ECM can be costly. Replacement can also be a time consuming task. Follow the troubleshooting procedures in this manual in order to ensure that replacing the ECM will correct the problem. Verify that the suspect ECM is the cause of the problem.A test ECM can be used to determine if the ECM is faulty. Refer to Troubleshooting, "Test ECM Mode".
If the flash file and engine application are not matched, engine damage may result.
Perform the following procedure in order to replace the ECM:
Record the configuration data:
Try to establish communication between the Caterpillar Electronic Technician (ET) and the ECM. Proceed to Test Step 2 if Cat ET does not communicate with the ECM.
Print the parameters from the "Configuration" screen on Cat ET. If a printer is unavailable, record all of the parameters.
Obtain the customer passwords. Access the customer specified parameters with Cat ET. Record the value of each customer parameter.Note: If the customer passwords are not available proceed to Troubleshooting, "Customer Passwords" for details that are related to customer passwords.
Record ECM lifetime totals.
Record any logged diagnostic codes.
Use the "Copy Configuration/ECM Replacement" feature that is found under the "Service" menu on Cat ET. Select "Load from ECM" in order to copy the configuration data from the suspect ECM.Note: If the "Copy Configuration" process fails and the parameters were not obtained in Step 1.b, the parameters must be obtained elsewhere. Some of the system configuration parameters are stamped on the engine information plate. Most of the parameters must be obtained from the factory. Parameters that are related to customer specified parameters must be obtained from the customer.
Remove the ECM:
Turn the keyswitch OFF.
Disconnect the P1 and P2 connectors.
Disconnect the ECM ground strap.
Remove the mounting hardware at each corner of the ECM.
Install the replacement ECM:
Use the old mounting hardware to install the replacement ECM.
Connect the ECM ground strap.
Connect the P1 and P2 connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Configure the replacement ECM:
Flash program the latest available flash file into the ECM. Refer to Troubleshooting, "ECM Software - Install" for the correct procedure.
Use Cat ET