B2-1x

SRS DTC Troubleshooting: B2-1x (x can be 0 thru 9 or A thru F)

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-SNA0300
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

Does the SRS indicator stays on, and is DTC B2-11 indicated?
YES - Go to step 4.

NO - Go to step 5.


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.


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

Is DTC B2-1x (except B2-11) also indicated?
YES - Go to step 6.

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 the 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. Service and Repair






9. Disconnect the floor wire harness 4P connector (A) from the left side impact sensor (first). Side Impact Sensor (First) Replacement






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.

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.

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.

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.

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.

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 be 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. If the connection is OK, replace the rear safing sensor, Service and Repair then clear the DTC.

NO - Open in the floor wire harness; replace the floor wire harness, then clear the DTC.