DTC 21-5

DTC 21-5: Short to Ground in Front Driver's Seat Belt Buckle Tensioner

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead F 07XAZ-SZ30100

1. Erase 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?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.

3. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.




4. Disconnect the driver's seat belt buckle tensioner 4P connector from the floor wire harness (A).
5. Connect the inflator simulator (2 ohm connectors) and the simulator lead F to the floor wire harness 4P connector.
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.

Is DTC 21-5 indicated?

YES - Go to step 9.

NO - Short to ground in the driver's seat belt buckle tensioner; replace the driver's seat belt.

9. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.




10. Disconnect both side airbag 2P connectors (A) and the front passenger's seat belt buckle tensioner 4P connector (B).




11. Disconnect SRS unit connector B (18P) from the SRS unit.
12. Disconnect the simulator lead from the floor wire harness 4P connector.




13. Check resistance between the No. 1 terminal of SRS unit connector B (18P) and body ground, and between the No. 10 terminal and body ground. There should be an open circuit or at least 1 MOhm.

Is the resistance as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Short to ground in the floor wire harness; replace the floor wire harness.