Conditions Which Generate This Code:
This condition indicates that the J1939 data link has a short circuit or an open circuit. All of the following conditions must be met:
• The parameter “Powertrain Data Link” must be programmed J1939.
• The ECM is unsuccessful in receiving a response to a message that has been transmitted for 10 seconds.
Electronic System Response J1939 communications to the engine and from the engine are terminated 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.
Service Tool Display or Lamps The Caterpillar Electronic Technician (ET) will display “NO COMM” on the status screen next to the inputs that are not receiving communications.
Perform the following diagnostic procedure:
“Powertrain Data Link Circuit – Test”
Results:
• OK – STOP.
