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.
- 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 Testing and Inspection, and retest.
- Information marked with an asterisk (*1) applies to '09-11 models.
- Information marked with an asterisk (*2) applies to '12 model.

1. Raise the driver's seat all the way up.

2. Clear the DTCs with the HDS.

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

4. Check for DTCs with the HDS.

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), then wait for 10 seconds.

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

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






8. Clear the DTCs with the HDS.

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

10. Check for DTCs with the HDS.

Is DTC 71-2x indicated?

YES -

Go to step 11.

NO -

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

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

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

13. Disconnect SRS unit connector B (39P) from the SRS unit.

14. Measure the resistance between body ground and SRS unit connector B (39P) terminal No. 23*1 (No. 28*2).





Is there an open circuit, or at least 1 MOhms?

YES -

Faulty driver's seat position sensor or 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 Service and Repair.

NO -

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