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, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software SRS Unit Update, and retest.

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

Is DTC 71-2x 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), then wait for 10 seconds.

5. Remove the seat recline cover Front Seat Recline Cover Removal/Installation.

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






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

8. Check for the DTCs with the HDS.

Is DTC 71-2x indicated?

YES -

Go to step 9.

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.�

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

10. Disconnect the negative cable to the battery, then wait at least 3 minutes.

11. Disconnect SRS unit connector B (39P) from the SRS unit Service and Repair.

12. Measure the resistance between SRS unit connector B (39P) terminal No. 23 and body ground. 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. If the problem is still present, replace the SRS unit SRS Unit Replacement.�

NO -

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