28-1x

SRS DTC Troubleshooting: 28-1x (x can be 0 thru 9 or A thru F)

DTC 28-1x ("x" can be 0 thru 9 or A thru F):Open in the Front Passenger'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, Technician Safety Information General Troubleshooting Information, Initial Inspection and Diagnostic Overview and Battery Terminal Disconnection and Reconnection. Procedures

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.

Does the SRS indicator stay on, and is DTC 28-1x indicated?
YES - Go to step 3.

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.


3. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

4. Disconnect the floor wire harness 4P connector (A) from the front passenger's seat belt buckle tensioner connector (B).

5. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead K to the floor wire harness connector.






6. Reconnect the negative cable to the battery.

7. Clear the DTC memory.

8. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC 28-1x indicated?
YES - Go to step 9.

NO - Open in the front passenger's seat belt buckle tensioner; replace the front passenger's seat belt buckle, Front Seat Belt Replacement then clear the DTC.


9. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

10. Disconnect both seat belt tensioner 4P connectors Technician Safety Information and the driver's seat belt tensioner 4P connector. Technician Safety Information

11. Disconnect SRS unit connector B (28P) from the SRS unit. Technician Safety Information

12. Measure the resistance between SRS unit connector B (28P) terminals No. 9 and No. 10. 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; if the connection is OK, replace the SRS unit. SRS Unit Replacement

NO - Open in the floor wire harness; replace the floor wire harness, then clear the DTC.