Troubleshooting

J1939

Problem	Possible Solution
The CAN bus node is red or has a red exclamation mark.	See the general troubleshooting for the CAN bus.
The J1939 Manager is red or has a red exclamation mark.	Check the status page and logger page of the J1939 Manager. You will find more information here. Possible causes: You do not have a license or the demo license has expired. Too little memory is available.
An ECU has a red exclamation mark.	The device reports a diagnostic code (DM1). Check the status page and logger page of the J1939 Manager. You will find more information here.
A slave has a gray exclamation mark.	An error occurred in the past which has been corrected in the meantime. You can check the logger page for which error this was. You can confirm the gray exclamation mark by clicking the Confirm button on the status page or the command in the context menu of the device.
The inputs and outputs of my ECU do not work.	Possible causes: The ECU has an incorrect address or an incorrect parameter group has been configured.
An ECU quits sporadically (turns red and then green again).	Possible causes: The Communication Watchdog is not set appropriately. In the task monitor, check the minimum and maximum time of the bus cycle task. In the application, search for application code which produces these cycle time outliers: Optimize the code or move it to another task. There are cycle time outliers in the bus cycle task. A handle leak was caused by a faulty driver or incorrect usage of the CL2 layer. A hardware error exists. See the chapter for troubleshooting CAN-based fieldbuses.