DTC B1-11
DTC B1-11: No Signal from the Roll Rate SensorSpecial Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead H 07YAZ-S3AA100
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), and check that the SRS indicator comes on for about 6 seconds and then goes off.
Does the SRS indicator stay on, and is DTC B1-11 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures If another DTC is indicated, troubleshoot the DTC.
3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
4. Check the connection between the SRS harness 2P connector and the roll rate sensor.
Is the connection OK?
YES - Go to step 5.
NO - Repair the poor connection and retest. If DTC B1-11 is still present, go to step 5.
5. Disconnect the driver's side airbag and front passenger's side airbag 2P connectors.
6. Disconnect the both seat belt tensioner 2P connectors.
7. Disconnect the SRS harness 2P connector (A) from the roll rate sensor.
8. Disconnect SRS unit connector C (28P) from the SRS unit.
9. Measure the resistance between the No.13 and No.14 terminals of SRS unit connector C (28P). There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Go to step 12.
NO - Go to step 10.
10. Disconnect SRS subharness 28P connector C854 (A) from SRS harness 28P connector C854 (B).
11. Measure the resistance between the No.15 and No.16 terminals of the SRS subharness 28P connector C854. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Short in the SRS subharness; replace the SRS subharness.
NO - Short in the SRS harness; replace the SRS harness.
12. Measure the resistance between the No.13 terminal of SRS unit connector C (28P) and body ground, and between the No.14 terminal and body ground. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Go to step 15.
NO - Go to step 13.
13. Disconnect SRS subharness 28P connector C854 (A) from SRS harness 28P connector C854 (B).
14. Measure the resistance between the No.15 terminals of the SRS subharness 28P connector C854 and body ground, and between the No.16 terminal and body ground. There should be an open circuit or at least 1 Mohms.
Is the resistance as specified?
YES - Short to ground in the SRS subharness; replace the SRS subharness.
NO - Short to ground in the SRS harness; replace the SRS harness.
15. Reconnect the negative cable to the battery.
16. Measure the for voltage between the No.13 terminal of SRS unit connector C (28P) and body ground, and between the No.14 terminal and body ground. There should be less than 1 V.
Is the voltage as specified?
YES - Go to step 19.
NO - Go to step 17.
17. Disconnect SRS subharness 28P connector C854 (A) from SRS harness 28P connector C854 (B).
18. Measure the voltage between the No.15 terminals of the SRS subharness 28P connector C854 and body ground, and between the No.16 terminal and body ground. There should be less then 1 V.
Is the voltage as specified?
YES - Short to power in the SRS subharness; replace the SRS subharness.
NO - Short to power in the SRS harness; replace the SRS harness.
19. Connect the SRS inflator simulator (jumper connector) and simulator lead H to the SRS harness 2P connector (A).
20. Measure the resistance between the No.13 and No.14 terminals of SRS unit connector C (28P). There should be less than 1.0 ohm.
Is the resistance as specified?
YES - Faulty roll rate sensor or SRS unit; replace the roll rate sensor. If the problem is still present, replace the SRS unit.
NO - Go to step 21.
21. Disconnect SRS subharness 28P connector C854 (A) from SRS harness 28P connector C854 (B).
22. Measure the resistance between the No.15 and No.16 terminals of the SRS harness 28P connector C854. There should be less than 1.0 ohm.
Is the resistance as specified?
YES - Open in the SRS subharness; replace the SRS subharness.
NO - Open in the SRS harness; replace the SRS harness.