Symptom Troubleshooting

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

The HDS does not communicate with the 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 as needed Removal and Replacement, then recheck.

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

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 MICU Input Test.

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

Are any DTCs indicated?

YES -

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

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

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. Turn the ignition switch to ON (II).

10. Measure the voltage between BSI control unit 16P connector terminals No. 2 and No. 15.





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. 15 and body ground.





Is there battery voltage?

YES -

Repair an open in the wire between the BSI control unit and ground (G802).

NO -

Repair an open or short to power in the wire between the rear fuse box and the BSI control unit.

12. Turn the ignition switch to LOCK (0).

13. Disconnect rear fuse box connector A (49P).

14. Check for continuity between BSI control unit 16P connector terminal No. 3 and rear fuse box connector A (49P) terminal No. 24 and between BSI control unit 16P connector terminal No. 4 and rear fuse box connector A (49P) terminal No. 23.





Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire between the rear fuse box and the BSI control unit.

15. Reconnect rear fuse box connector A (49P).

16. Reconnect the BSI control unit 16P connector.

17. Turn the ignition switch to ON (II).

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

Is communication possible?

YES -

The system is OK at this time. Check for loose or poor connections.

NO -

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