Communication For Initializing Impossible
When communication with the radar sensor is impossible
Detecting condition:
- Defective harness connector
- Power supply circuit malfunction
- Defective radar sensor
- Defective CAN communication circuit
- Defective Subaru Select Monitor
Trouble symptom:
Communication is impossible between radar sensor and Subaru Select Monitor.
Wiring diagram:
NOTE:
For the coupling connector, refer to "WIRING SYSTEM".
BSD/RCTA system Ref. to WIRING DIAGRAM , Blind Spot Detection/Rear Cross Traffic Alert.
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK FUSE.
|
Is the check result OK? | Go to step 2 | Replace the fuse. If the replaced fuse has blown out immediately, repair the short circuit to ground in harness between fuse and radar sensor LH. |
2 CHECK HARNESS (OPEN CIRCUIT).
|
Is the voltage 10 V or more? | Go to step 3 . | Repair the open circuit of harness between fuse and radar sensor LH connector. |
3 CHECK HARNESS (OPEN CIRCUIT).
|
Is the resistance less than 1 Ω? | Go to step 4 . | Repair the open circuit in harness between radar sensor and chassis ground. |
4 CHECK LAN SYSTEM.
|
Is the check result OK? | Go to step 5 | Perform the inspection according to the diagnosis for LAN system. |
| 5 CHECK RADAR SENSOR. Communicate with the radar sensor. |
Is communication possible? | The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
|
Replace the radar sensor LH. Ref. to RADAR SENSOR |