27-2x

SRS DTC Troubleshooting: 27-1x, 27-2x

DTC 27-1x ("x" can be 0 thru 9 or A thru F):

Open in the Driver's Seat Belt Buckle Tensioner

DTC 27-2x ("x" can be 0 thru 9 or A thru F):

Increased 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 DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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

3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 27-1x or 27-2x indicated?

YES -

Go to step 4.

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. �

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 SRS wire harness 4P connector (A) from the driver's seat belt buckle tensioner.





7. Connect the terminals of SRS simulator lead K to the SRS inflator simulator (2 Ohms connectors), and then connect the SRS simulator lead K to the SRS wire harness.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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

11. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 27-1x or 27-2x indicated?

YES -

Go to step 12.

NO -

Open or increased resistance in the driver's seat belt buckle tensioner; replace the driver's seat belt buckle Front Seat Belt Replacement, 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 SRS unit connector B (28P) from the SRS unit Service and Repair.

15. Measure the resistance between SRS unit connector B (28P) terminals No. 7 and No. 8. There should be 2.0-3.0 Ohms.





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 between the connector and the SRS unit. If the connection is OK, replace the SRS unit SRS Unit Replacement. If the DTC does not clear, replace the harness.�

NO -

Open or increased resistance in the SRS wire harness; replace the SRS wire harness, then clear the DTC.�