C7.1 Engines Caterpillar

Use this procedure in order to troubleshoot a diagnostic code for a special instruction. Use this procedure if one of the following diagnostic codes are active.

Note: Some of the following codes may not be applicable for certain applications.

Table 1

Diagnostic Trouble Codes for the Data Link Configuration Status
J1939 Code	CDL Code	Code Description (code descriptions may vary)	Comments
-	248-14	Cat Data Link : Special Instruction	The data received over the Cat data link is not in the correct format. The code is logged.
-	1603-14	Machine Control Module : Special Instruction	The data received from a machine ECM is not in the correct format. The code is logged.
639-14	247-14	J1939 Network #1 : Special Instruction	The data received from the CAN A data bus is not in the correct format. The code is logged.
1231-14	2348-14	J1939 Network #2 : Special Instruction	The data received from the CAN B data bus is not in the correct format. The code is logged.
1235-14	5856-14	J1939 Network #3 : Special Instruction	The data received from the CAN C data bus is not in the correct format. The code is logged.
5576-14	3468-14	Aftertreatment #1 Identification : Special Instruction	The data received from the aftertreatment ID module is not in the correct format. The code is logged.
5588-14	E1132 (2)	Proprietary Network #2 : Special Instruction	The data received from the DCU is incompatible. The code is logged.

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.

The following list identifies possible faults on the data link:

• Incorrect personality module code

• An invalid configuration parameter

• Incorrect module or display on the data link

• Damaged data link wiring

• Incompatible software in one of the ECMs

Complete the procedure in the order in which the steps are listed.

Table 2

Troubleshooting Test Steps	Values	Results
1. Check for an Associated -9 Code A. Establish communication between the electronic service tool and the Electronic Control Module (ECM) for the engine. B. Download a "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Check for active diagnostic codes.	Associated Trouble code	Result: An associated -9 code is logged. Repair: Repair all associated -9 codes before continuing with this procedure. Refer to Troubleshooting, "Data Link - Test". If a -14 code is still present after resolving the -9 code, proceed to Test Step 2. Result: An associated -9 code is not logged. Proceed to Test Step 2.
2. Check the Personality Module Code for Compatibility with the Application A. Connect to the electronic service tool. B. Select the ECM connection that is related to the logged code. C. Check if the personality module code is valid for the application.	Compatible personality module	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. Reset all active codes and clear all logged codes. Return the unit to service.
3. Check the Configuration Parameters A. Check the configuration parameters in order to ensure that the parameters are programmed correctly. Refer to Troubleshooting, "Configuration Parameters". B. Select the ECM connection that is related to the logged code.	Correct configuration parameters	Result: The configuration parameters are programmed correctly. Proceed to Test Step 4. Result: The configuration parameters are not programmed correctly. Repair: Program the parameters to function with the other modules on the data link. Reset all active codes and clear all logged codes. Return the unit to service.
4. Check for Compatibility with Any Other ECM on the Data Link A. Use the "as shipped" information found in SIS Web TMI to determine if any other ECM or display on the data link is incompatible. B. Select the ECM connection that is related to the logged code.	Compatible ECM	Result: The ECMs are not compatible. Repair: Replace the incompatible ECM with the correct module. Reset all active codes and clear all logged codes. Return the unit to service. If the fault is still present, contact the Dealer Solutions Network (DSN).