28-9x

SRS DTC Troubleshooting: 28-9x

DTC 28-9x ("x" can be 0 thru 9 or A thru F):

Short to Ground 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 Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.

1. Clear the DTCs with 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 28-9x 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 front passenger's seat subharness 4P connector (A) from the front passenger's seat belt buckle tensioner connector (B).





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 front passenger's seat subharness connector.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with 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 28-9x indicated?

YES -

Go to step 12.

NO -

Short to ground 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.�

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. Disconnect the SRS simulator lead K from the front passenger's seat subharness.

16. Measure the resistance between body ground and SRS unit connector B (28P) terminals No. 9 and No. 10, individually. 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 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 -

Go to step 17.

17. Disconnect center floor wire harness 4P connector C554 (A) from front passenger's seat subharness 4P connector C554 (B).






18. Measure the resistance between body ground and floor wire harness 4P connector C554 terminals No. 1 and No. 2, individually. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Short to ground in the front passenger's seat subharness; replace the front passenger's seat subharness, then clear the DTC.�

NO -

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