71-2x

SRS DTC Troubleshooting: 71-2x

DTC 71-2x ("x" can be 0 thru 9 or A thru F):

Short in the Driver's Seat Position Sensor

NOTE:

- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
- 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. Raise the driver's seat all the way up.

2. Clear the DTC memory.

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

4. Read the DTC.

Is DTC 71-2x indicated?

YES -

Go to step 5.

NO -

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

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

6. Disconnect the driver's seat position sensor harness 2P connector (A) from the driver's seat position sensor Service and Repair.





7. Clear the DTC memory.

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

9. Read the DTC.

Is DTC 71-2x indicated?

YES -

Go to step 10.

NO -

Faulty driver's seat position sensor; replace the driver's seat position sensor Service and Repair, then clear the DTC.�

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

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

12. Disconnect both front seat belt buckle tensioner 4P connectors and both front seat belt tensioner 4P connectors.

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

14. Measure the resistance between SRS unit connector B (28P) terminals No. 5 and No. 6. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Go to step 15.

NO -

Short to another wire in the floor wire harness, driver's seat wire harness (with seat heater), or the driver's seat position sensor harness; replace the faulty harness, then clear the DTC.�

15. Measure the resistance between body ground and SRS unit connector B (28P) terminals No. 5 and No. 6 individually. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Faulty driver's seat position sensor or the SRS unit; replace the driver's seat position sensor Service and Repair, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit SRS Unit Replacement.�

NO -

Short to another wire in the floor wire harness, driver's seat wire harness (with seat heater), or the driver's seat position sensor harness; replace the faulty harness, then clear the DTC.�