B2-1x

SRS DTC Troubleshooting: B2-1x

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 Service and Repair and General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.

1. Clear the DTC memory Reading and Clearing Diagnostic Trouble Codes.

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

3. Read the DTC Reading and Clearing Diagnostic Trouble Codes.

Is DTC B2-11 indicated?

YES -

Go to step 4 B2-1x.

NO -

Go to step 5 B2-1x.

4. Read the DTC Reading and Clearing Diagnostic Trouble Codes.

Is DTC 45-11 also indicated?

YES -

Faulty rear safing sensor; replace the rear safing sensor Service and Repair, then clear the DTC.�

NO -

Go to step 7 B2-1x.

5. Read the DTC Reading and Clearing Diagnostic Trouble Codes.

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

YES -

Go to step 6 B2-1x.

NO -

Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.�

6. Read the DTC Reading and Clearing Diagnostic Trouble Codes.

Is DTC 45-11 also indicated?

YES -

Troubleshoot DTC 45-1x 45-1x.�

NO -

Faulty rear safing sensor; replace the rear safing sensor Service and Repair, then clear the DTC.�

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

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






9. Disconnect the floor wire harness 4P connector (A) from the left side impact sensor (first).






10. Measure the resistance between floor wire harness 4P connector (Rear safing sensor) 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 11 B2-1x.

NO -

Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.�

11. Measure the resistance between floor wire harness 4P connector (Rear safing sensor) terminal No. 2 and body ground. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Go to step 12 B2-1x.

NO -

Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.�

12. Measure the resistance between floor wire harness 4P connector (Rear safing sensor) terminal No. 3 and body ground. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Go to step 13 B2-1x.

NO -

Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.�

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

14. Measure the voltage between floor wire harness 4P connector (Rear safing sensor) terminal No. 2 and body ground. There should be less than 0.2 V.





Is the voltage as specified?

YES -

Go to step 15 B2-1x.

NO -

Short to power in the floor wire harness; replace the floor wire harness, then clear the DTC.�

15. Measure the voltage between floor wire harness 4P connector (Rear safing sensor) terminal No. 3 and body ground. There should be less than 0.2 V.





Is the voltage as specified?

YES -

Go to step 16 B2-1x.

NO -

Short to power in the floor wire harness; replace the floor wire harness, then clear the DTC.�

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

17. Connect the SRS inflator simulator (jumper connector) and the black lead (A) of simulator lead L to the floor wire harness 4P connector (B) at the left side impact sensor (first).






18. Measure the resistance between floor wire harness 4P connector (Rear safing sensor) terminals No. 2 and No. 3. There should less than 1.0 Ohms.





Is the resistance as specified?

YES -

Faulty rear safing sensor or poor connection at the floor wire harness 4P connector and the rear safing sensor. Check the connection between the connector and the rear safing sensor Connector and Harness Locations. If the connection is OK, replace the rear safing sensor Service and Repair, then clear the DTC. If the DTC is still present, replace the SRS unit SRS Unit Replacement.�

NO -

Open in the floor wire harness; replace the floor wire harness, then clear the DTC.�