46-1x

SRS DTC Troubleshooting: 44-1x, 46-1x

DTC 44-1x ("x" can be 0 thru 9 or A thru F):

No Signal From the Right Side Impact Sensor (first)

DTC 46-1x ("x" can be 0 thru 9 or A thru F):

No Signal From the Right Side Impact Sensor (second)

NOTE:

- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software SRS Unit Update, and retest.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to ON (II), then wait for 10 seconds.

3. Check for DTCs with the HDS.

Is DTC 46-1x (except 46-11) indicated?

YES -

Faulty right side impact sensor (second); replace the right side impact sensor (second) Side Impact Sensor (Second) Replacement, then clear the DTC.�

NO -

Go to step 4.

4. Clear the DTCs with the HDS.

5. Turn the ignition switch to ON (II), then wait for 10 seconds.

6. Check for DTCs with the HDS.

Is DTC 44-1x (except 44-11) indicated?

YES -

Faulty right side impact sensor (first); replace the right side impact sensor (first) Side Impact Sensor (First) Replacement, then clear the DTC.�

NO -

Go to step 7.

7. Clear the DTCs with the HDS.

8. Turn the ignition switch to ON (II), then wait for 10 seconds.

9. Check for DTCs with the HDS.

Is DTC 46-11 indicated?

YES -

Go to step 13.

NO -

Go to step 10.

10. Clear the DTCs with the HDS.

11. Turn the ignition switch to ON (II), then wait for 10 seconds.

12. Check for DTCs with the HDS.

Is DTC 44-11 indicated?

YES -

Go to step 40.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.�

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

14. Check the connections between SRS unit connector B (39P) and the SRS unit, and between the right side wire harness 4P connector and the right side impact sensor (first) Side Impact Sensor (First) Replacement, and between the right side wire harness 2P connector and right side impact sensor (second) Side Impact Sensor (Second) Replacement.

Are the connections OK?

YES -

Go to step 15.

NO -

Replace the right side wire harness, then clear the DTC.�

15. Substitute a known-good right side impact sensor (second) Side Impact Sensor (Second) Replacement.

16. Reconnect the negative cable to the battery.

17. Clear the DTCs with the HDS.

18. Turn the ignition switch to ON (II), then wait for 10 seconds.

19. Check for DTCs with the HDS.

Is DTC 46-11 indicated?

YES -

Go to step 20.

NO -

Faulty right side impact sensor (second); replace the right side impact sensor (second) Side Impact Sensor (Second) Replacement, then clear the DTC.�

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

21. Disconnect the negative cable from the battery, then wait at least 3 minutes.

22. Reinstall the impact sensor (first) that was replaced in step 15.

23. Substitute a known-good right side impact sensor (first) Side Impact Sensor (First) Replacement.

24. Reconnect the negative cable to the battery.

25. Clear the DTCs with the HDS.

26. Turn the ignition switch to ON (II), then wait for 10 seconds.

27. Check for DTCs with the HDS.

Is DTC 46-11 indicated?

YES -

Go to step 28.

NO -

Faulty right side impact sensor (first); replace the right side impact sensor (first) Side Impact Sensor (First) Replacement, then clear the DTC.�

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

29. Disconnect the negative cable from the battery, then wait at least 3 minutes.

30. Disconnect SRS unit connector B (39P) from the SRS unit.

31. Disconnect the right side wire harness 4P connector from the right side impact sensor (first) Side Impact Sensor (First) Replacement.

32. Disconnect the right side wire harness 2P connector from the right side impact sensor (second) Side Impact Sensor (Second) Replacement.

33. Measure the resistance between right side wire harness 2P connector (right side impact sensor (second)) terminals No. 1 and No. 2. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?

YES -

Go to step 34.

NO -

Short to another wire in the right side wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the right side wire harness, then clear the DTC.�

34. Measure the resistance between body ground and right side wire harness 2P connector (right side impact sensor (second)) terminals No. 1 and No. 2 individually. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?

YES -

Go to step 35.

NO -

Short to ground in the right side wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the right side wire harness, then clear the DTC.�

35. Reconnect the negative cable to the battery.

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

37. Measure the voltage between body ground and right side wire harness 2P connector (right side impact sensor (second)) terminals No. 1 and No. 2 individually. There should be less than 0.2 V.

Is the voltage as specified?

YES -

Go to step 38.

NO -

Short to power in the right side wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the right side wire harness, then clear the DTC.�

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

39. Measure the resistance between right side wire harness 4P connector (right side impact sensor (first)) terminal No. 1 and right side wire harness 2P connector (right side impact sensor (second)) terminal No. 2, and between right side wire harness 4P connector (right side impact sensor (first)) terminal No. 4 and right side wire harness 2P connector (right side impact sensor (second)) terminal No. 1. There should be less than 1.0 Ohms.

Is the resistance as specified?

YES -

Disconnect and reconnect the connector, and then check DTC again. If the DTC is still present, replace the SRS unit SRS Unit Replacement.�

NO -

Open in the right side wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the right side wire harness, then clear the DTC.�

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

41. Check the connections between SRS unit connector B (39P) and the SRS unit, and between the right side wire harness 4P connector and the right side impact sensor (first) Side Impact Sensor (First) Replacement, and between the right side wire harness 2P connector and right side impact sensor (second) Side Impact Sensor (Second) Replacement.

Are the connections OK?

YES -

Go to step 42.

NO -

Replace the right side wire harness, then clear the DTC.�

42. Substitute a known-good right side impact sensor (first) Side Impact Sensor (First) Replacement.

43. Reconnect the negative cable to the battery.

44. Clear the DTCs with the HDS.

45. Turn the ignition switch to ON (II), then wait for 10 seconds.

46. Check for DTCs with the HDS.

Is DTC 44-11 indicated?

YES -

Go to step 47.

NO -

Faulty right side impact sensor (first); replace the right side impact sensor (first) Side Impact Sensor (First) Replacement, then clear the DTC.�

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

48. Disconnect the negative cable from the battery, then wait at least 3 minutes.

49. Disconnect SRS unit connector B (39P) from the SRS unit.

50. Disconnect the right side wire harness 4P connector from the right side impact sensor (first) Side Impact Sensor (First) Replacement.

51. Measure the resistance between right side wire harness 4P connector (right side impact sensor (first)) terminals No. 2 and No. 3. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?

YES -

Go to step 52.

NO -

Short to another wire in the right side wire harness between the SRS unit and the right side impact sensor (first); replace the right side wire harness, then clear the DTC.�

52. Measure the resistance between body ground and right side wire harness 4P connector (right side impact sensor (first)) terminals No. 2 and No. 3 individually. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?

YES -

Go to step 53.

NO -

Short to ground in the right side wire harness between the SRS unit and the right side impact sensor (first); replace the right side wire harness, then clear the DTC.�

53. Reconnect the negative cable to the battery.

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

55. Measure the voltage between body ground and right side wire harness 4P connector (right side impact sensor (first)) terminals No. 2 and No. 3 individually. There should be less than 0.2 V.

Is the voltage as specified?

YES -

Go to step 56.

NO -

Short to power in the right side wire harness between the SRS unit and the right side impact sensor (first); replace the right side wire harness, then clear the DTC.�

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

57. Measure the resistance between right side wire harness 4P connector (right side impact sensor (first)) terminal No. 2 and SRS unit connector B (39P) terminal No. 39, and between right side wire harness 4P connector (right side impact sensor (first)) terminal No. 3 and SRS unit connector B (39P) terminal No. 38. There should be less than 1.0 Ohms.