HDS Does Not Communicate With the Blind Spot Information System (BSI)

Blind Spot Information System (BSI) Symptom Troubleshooting - HDS does not communicate with the blind spot information system (BSI)

The HDS does not communicate with the blind spot information system (BSI)

NOTE:

- If the system malfunctions, always check for DTCs with the HDS.
- If a DTC is stored, troubleshoot the DTC first.

1. Test the battery Battery Test.

Is the battery OK?

YES -

Go to step 2.

NO -

Charge or replace the battery Removal and Replacement as needed, then recheck.

2. Connect the HDS to the data link connector.

3. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.

4. Make sure the HDS can communicate with the body electrical system.

Is communication possible?

YES -

Go to step 5.

NO -

Do the MICU unit input test Drivers and Passengers MICU Input Test.

5. Check for body electrical system DTCs with the HDS How to Troubleshoot Electrical Systems.

Are any DTCs indicated?

YES -

Troubleshoot the indicated body electrical system DTC(s), and retest.

NO -

Go to step 6.

6. Press the engine start/stop button to select the OFF mode.

7. Check the connection at the BSI control unit 16P connector.

Is the connection OK?

YES -

Go to step 8.

NO -

Repair the poor connection, and recheck.

8. Disconnect the BSI control unit 16P connector.

9. Press the engine start/stop button to select the ON mode.

10. Measure the voltage between BSI control unit 16P connector terminals No. 7 and No. 10.





Is there battery voltage?

YES -

Go to step 12.

NO -

Go to step 11.

11. Measure the voltage between BSI control unit 16P connector terminal No. 10 and body ground.





Is there battery voltage?

YES -

Repair an open in the wire between the BSI control unit and ground (G601).

NO -

Repair an open or short to power in the wire between the driver's under-dash fuse/relay box and the BSI control unit.

12. Press the engine start/stop button to select the OFF mode.

13. Disconnect driver's under-dash fuse/relay box connector P (20P).

14. Check for continuity between driver's under-dash fuse/relay box connector P (20P) terminal No. 6 and BSI control unit 16P connector terminal No. 6, and between driver's under-dash fuse/relay box connector P (20P) terminal No. 5 and BSI control unit 16P connector terminal No. 5.





Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire between the driver's under-dash fuse/relay box and the BSI control unit.

15. Reconnect driver's under-dash fuse/relay box connector P (20P).

16. Reconnect the BSI control unit 16P connector.

17. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.

18. Check that the HDS can communicate with the BSI system.

Is communication possible?

YES -

The system is OK at this time.

NO -

Replace the BSI control unit BSI Control Unit Removal/Installation.