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 Technician Safety Information and General Troubleshooting Information . Initial Inspection and Diagnostic Overview
1. Clear the DTC memory. Initial Inspection and Diagnostic Overview
2. Turn the ignition switch to ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.
3. Read the DTC. Initial Inspection and Diagnostic Overview
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. Initial Inspection and Diagnostic Overview
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. Initial Inspection and Diagnostic Overview
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. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.
6. Read the DTC. Initial Inspection and Diagnostic Overview
Is DTC 45-11 also indicated?
YES - Go to the Troubleshooting, for 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 (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 rear safing sensor 4P connector 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 in the floor wire harness; replace the floor wire harness, then clear the DTC.
11. Measure the resistance between rear safing sensor 4P connector 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 rear safing sensor 4P connector 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 rear safing sensor 4P connector 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 rear safing sensor 4P connector 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 rear safing sensor 4P connector 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.
