This condition indicates that the J1939 data link is receiving information from a specified device but the information is incomplete or corrupted.
The parameter "Powertrain Data Link" must be programmed to J1939.
One of the following conditions must be met:
- The device is broadcasting a fault code.
- The Engine Control Module (ECM) is unsuccessful in receiving a specific message from a device.
- The device is broadcasting a code that is not supported.
System Response:
Caterpillar Electronic Technician (ET) will indicate a safe default value or display "DIAG" on a status screen. If the device sends a message that is not supported, Cat ET will display "J1939 No Support". Cat ET will display a list of the devices that are causing this code on the "Active Faults" screen. If the list of devices that are causing this code is too large, all of the devices will not be listed until some of the incorrect messages are corrected.
J1939 communications to the engine and from the engine are terminated for the specific message while this code is active. The functionality of some features may be affected while this code is active. Traction control or transmission controls may be disabled.
Test Step 1. Perform the following diagnostic procedure: Powertrain Data Link Circuit - Test
Results:
- OK - STOP