COUPLING 2N6737 - Caterpillar

The diagnostic code for the special instruction is logged in order to report the configuration status of the data link. The diagnostic code for the special instruction does not check the physical condition of the data link.
Table 1
J1939 Code and Description Comments
234-14
Software Identification : Special Instruction The data received from the CAN data bus is not in the correct format.
The code is for a problem between the Electronic Control Module (ECM) and Integrated Sensing Module (ISM).
The code is logged. The following list identifies possible faults on the data link:
Incorrect personality module code
An invalid configuration parameter
Software incompatible for communications with the ECM.
Incorrect module or display on the data link
Damaged data link wiring
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: An associated -9 code is not logged.
Proceed to Test Step 2.
Result: An associated -9 code is logged.
Repair: Repair all associated -9 codes before continuing with this procedure. Refer to Troubleshooting, "Data Link - Test" for additional information.
If a -14 code is still present after resolving the -9 code, proceed to Test Step 2.
2. Check the Personality Module Code for Compatibility with the Application
A. Connect Cat ET.
B. Select the Electronic Control Module (ECM) or Integrated Sensing Module (ISM) connection that is related to the logged code.
C. Check if the personality module code is valid for the application.
Compatibility
Result: The code is valid for the application.
Proceed to Test Step 3.
Result: The code is not valid for the application.
Repair:Obtain the correct flash file and update the ECM or ISM.
If the problem is not resolved, proceed to Test Step 3.
3. Check for Incorrect Configuration Parameters
A. Connect Cat ET.
B. Use Cat ET to verify that the correct parameters are being used.
C. Select the ECM connection that is related to the logged code.
Parameters
Result: The parameters are correct.
Proceed to Test Step 4.
Result: The parameters are not correct.
Repair: Input the correct parameters. Refer to Troubleshooting, "Configuration Parameters" for additional information.
If the problem is not resolved, proceed to Test Step 4.
4. Check for Compatibility with the ECM and the ISM on the Data Link
A. Use the as shipped information found in SIS web and TMI to determine if any other ECM or display on the data link are incompatible.
B. Select the ECM connection that is related to the logged code.
Compatibility
Result: The ECM and ISM are not compatible.
Repair: Replace the incompatible ECM or ISM with the correct module.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).