GASKET 5I7735 - Caterpillar

PID 0231 FMI 14Conditions Which Generate This Code:This condition indicates that the Engine Control Module (ECM) has lost communication from the transmission via the J1939 Data Link. The following list contains examples of the causes for the loss of communication:
Loss of communication from the transmission to the engine ECM for more than one second
The engine and the transmission are no longer compatible.
The parameter "Powertrain Data Link" is not programmed to J1939.System Response:If the engine and the transmission fail to communicate the engine will operate under a torque limit that is set by the transmission. The diagnostic code represents a logged event. Caterpillar Electronic Technician (ET) will display "Transmission Datalink Engine Derate" on the status screen. The code will not cause the check engine lamp to illuminate.The 231-14 code may become active after the ECM has communication with an automatic transmission.Possible Performance Effect:Note: This code does not indicate a problem with the engine or the electronic system.The engine may have low power. The engine may also have low torque while the diagnostic code is active.Troubleshooting:Test Step 1. Inspect Electrical Connectors and Wiring
Thoroughly inspect ECM vehicle harness connector J1/P1, the firewall bulkhead connector and the terminals for Low Range Torque Protection (LRTP) (terminals 34 and 50) in the connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the (LRTP), J1-34 and J1-50.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and pinch points from the sensor to the ECM. Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion or of pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Determine the Type of Vehicle Transmission
If the vehicle is not equipped with a transmission that requires torque protection access the "Transmission Default Torque Limit" screen of Cat ET in order to clear the fault.
If the vehicle is equipped with a transmission that requires torque protection use Cat ET to clear the fault. Access the "J1939 Receive Communication" screen in order to determine if the engine and the transmission are communicating over the "J1939 data Link". Results:
OK - STOP
Not OK - Proceed to Test Step 3.Test Step 3. Perform the following diagnostic procedure: "Powertrain Data Link Circuit - Test"Results:
OK - STOP