Open in One Side of CAN Branch Line [08/2013 - ]: Description
If an ECU or sensor is not displayed on the CAN Bus Check screen of the Techstream and some ECUs and sensors repeatedly appear and disappear from the screen when the CAN main bus lines are normal (there is no open, short, short to +B or short to GND in the main bus lines), there may be an open circuit in either of the lines in a CAN branch.
HINT:
If some ECUs and sensors repeatedly appear and disappear from the CAN Bus Check screen, communication between the normal ECUs (sensors) and the Techstream may be affected by the incomplete signals that are output from the ECU that has an open circuit in either of the lines in its CAN branch. In this case, the CAN branch lines for the ECUs and sensors that repeatedly appear and disappear from the screen are normal and the ECU that is not displayed on the screen may be the main cause of the problem (this ECU may have an open circuit in either of the lines in its CAN branch).
| Symptom | Trouble Area |
|---|---|
| 2 or more ECUs and/or sensors do not appear on the Techstream CAN Bus Check screen. | One side of CAN branch line is open, or output signals are incomplete.
|
- *1: w/ Navigation system
- *2: w/ Audio and visual system (w/ Multi-display with parking assist monitor system)
- *3: w/ Audio and visual system (w/ Multi-display without parking assist monitor system)
- *4: w/ Intuitive parking assist system