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, 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 DTC with the HDS Reading and Clearing Diagnostic Trouble Codes.
2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.
3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.
Is DTC B2-11 indicated?
YES -
Go to step 4.
NO -
Go to step 5.
4. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.
Is DTC 46-11 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. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.
Is DTC B2-1x (except B2-11) also indicated?
YES -
Go to step 6.
NO -
Intermittent failure, the 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. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.
Is DTC 46-11 also indicated?
YES -
Troubleshoot DTC 46-1x 46-1x.�
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), or press the engine start/stop button to select the OFF mode.
8. Disconnect the SRS floor wire harness 4P connector from the left side impact sensor (first) Side Impact Sensor (First) Replacement.
9. Disconnect the SRS floor wire harness 4P connector (rear safing sensor) from the rear safing sensor Service and Repair.
10. Measure the resistance between SRS 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 SRS floor wire harness; replace the SRS floor wire harness, then clear the DTC.�
11. Measure the resistance between body ground and SRS floor wire harness 4P connector (rear safing sensor) 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 12.
NO -
Short to ground in the SRS floor wire harness; replace the SRS floor wire harness, then clear the DTC.�
12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
13. Measure the voltage between body ground and SRS floor wire harness 4P connector (rear safing sensor) terminals No. 2 and No. 3 individually. There should be less than 0.2 V.
Is the voltage as specified?
YES -
Go to step 14.
NO -
Short to power in the SRS floor wire harness; replace the SRS floor wire harness, then clear the DTC.�
14. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
15. Connect the SRS inflator simulator (jumper connector) and the black lead (A) of simulator lead L to the SRS floor wire harness 4P connector (B).
16. Measure the resistance between SRS 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 SRS unit; 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 SRS floor wire harness; replace the SRS floor wire harness, then clear the DTC.�