DTC B2-1x

DTC B1-1x ("x" can be 0 thru 9 or A thru F): No Signal From the Roll Rate Sensor

DTC B2-1x ("x" can be 0 thru 9 or A thru F): No Signal From the Rear Safing Sensor

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead L 070AZ-SNAA300

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.

1. Clear the DTC memory.
2. Turn the ignition switch ON (II), then wait for 10 seconds.
3. Read the DTC.

Is DTC B1-1x (except B1-11) indicated?

YES - Faulty roll rate sensor; replace the roll rate sensor.

NO - Go to step 4.

4. Read the DTC.

Is DTC B2- 1x (except B2-11) indicated?

YES - Faulty rear safing sensor; replace the rear safing sensor.

NO - Go to step 5.

5. Read the DTC.

Is DTC B2-11 indicated?

YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time.

6. Turn the ignition switch OFF.
7. Check for damage to the floor wire harness between the SRS unit and rear safing sensor, rear safing sensor, and roll rate sensor.

Is the floor wire harness OK?

YES - Go to step 8.

NO - Replace the floor wire harness.

8. Disconnect the negative cable from the battery, then wait for 3 minutes.
9. Replace the rear safing sensor with a known-good part.
10. Clear the DTC memory.
11. Turn the ignition switch ON (II), and wait for 10 seconds.
12. Read the DTC.

Is DTC B2-11 indicated?

YES - Go to step 13.

NO - Faulty rear safing sensor; replace the original rear safing sensor.

13. Turn the ignition switch OFF.
14. Disconnect the negative cable from the battery, then wait for 3 minutes.
15. Replace the roll rate sensor with a known-good part.
16. Clear the DTC memory.
17. Turn the ignition switch ON (II), and wait for 10 seconds.
18. Read the DTC.

Is DTC B2-11 indicated?

YES - Go to step 19.

NO - Faulty roll rate sensor; replace the original roll rate sensor.

19. Turn the ignition switch OFF.
20. Disconnect the negative cable from the battery, then wait for 3 minutes.
21. Disconnect SRS unit connector C (16P) from the SRS unit.
22. Disconnect the floor wire harness 2P connector (A) from the roll rate sensor.






23. Disconnect the floor wire harness 4P connector (A) from the rear safing sensor.






24. Measure the resistance between the No. 2 and No. 3 terminal of the floor wire harness 4P connector. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Go to step 26.

NO - Short in the floor wire harness; replace the floor wire harness.

25. Measure the resistance between the No.1 and No. 4 terminal of the right side wire harness 4P connector. There should bean open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Go to step 27.

NO - Short in the floor wire harness; replace the floor wire harness.

26. Measure the resistance between the No. 2 terminal of floor wire harness 4P connector and body ground, and between the No. 3 terminal and body ground. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Go to step 28.

NO - Short to ground in the floor wire harness; replace the floor wire harness.

27. Measure the resistance between the No. 1 terminal of floor wire harness 4P connector and body ground, and between the No. 4 terminal and body ground. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Go to step 29.

NO - Short to ground in the floor wire harness; replace the floor wire harness.

28. Reconnect the negative cable to the battery.
29. Turn the ignition switch ON (II).
30. Measure the voltage between the No. 2 terminal of floor wire harness 4P connector and body ground, and between the No.3 terminal and body ground. There should be less than 1 V.






Is the voltage as specified?

YES - Go to step 32.

NO - Short to power in the floor wire harness; replace the floor wire harness.

31. Turn the ignition switch OFF.
32. Install a jumper wire between the No. 27 terminal and No. 28 terminal of the SRS unit connector C (16P).






33. Measure the resistance between the No. 2 and No. 3 terminal of the floor wire harness 4P connector. There should be 0 - 1.0 ohm.






Is the resistance as specified?

YES - Go to step 35.

NO - Open in the floor wire harness; replace the floor wire harness.

34. Connect the SRS inflator simulator (jumper connector) and the brack lead (A) of simulator lead L to the floor wire harness 2P connector (B).






35. Measure the resistance between the No. 1 and No. 4 terminal of the floor wire harness 4P connector. There should be 0 - 1.0 ohm.






Is the resistance as specified?

YES - Reconnect the floor wire harness 4P connector to the rear safing sensor and roll rate sensor. If the DTCs are still indicated, replace the SRS unit.

NO - Open in the floor wire harness; replace the floor wire harness.