27-3x

SRS DTC Troubleshooting: 27-3x

DTC 27-3x ("x" can be 0 thru 9 or A thru F):

Short to Another Wire or Decreased Resistance in the Driver's Seat Belt Buckle Tensioner

Special Tools Required

- SRS Inflator Simulator 07SAZ-TB4011A
- SRS Simulator Lead K 070AZ-SNAA200

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.

1. Clear the DTC memory.

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

3. Read the DTC.

Is DTC 27-3x indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.�

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

5. Disconnect the negative cable from the battery, then wait at least 3 minutes.

6. Disconnect the driver's seat belt tensioner 4P connector (A) from the driver's seat belt buckle tensioner 4P connector.





7. Connect the terminals of SRS simulator lead K to the SRS inflator simulator (2 Ohms connectors), and then connect SRS simulator lead K to the driver's seat belt tensioner 4P connector.

8. Reconnect the negative cable to the battery.

9. Clear the DTC memory.

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

11. Read the DTC.

Is DTC 27-3x indicated?

YES -

Go to step 12.

NO -

Short to another wire in the driver's seat belt buckle tensioner; replace the driver's seat belt buckle assembly, then clear the DTC.�

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

13. Disconnect the negative cable from the battery, then wait at least 3 minutes.

14. Disconnect both front seat belt tensioner 4P connectors.

15. Disconnect SRS unit connector B (28P) from the SRS unit.

16. Measure the resistance between SRS unit connector B (28P) terminals No. 7 and No. 8. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Faulty SRS unit or poor connection at SRS unit connector B (28P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit SRS Unit Replacement. If the DTC does not clear, replace the harness.�

NO -

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