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.

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

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

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

4. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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 Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.�

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

6. Disconnect the driver's seat position sensor subharness ('07 model with seat heater, '07-11 models without seat heater) or driver's seat wire harness ('08-11 models with seat heater) 2P connector (A) from the driver's seat position sensor (B).





7. Clear the DTCs with HDS.

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

9. Check for DTCs with the HDS.

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 SRS unit connector B (28P) from the SRS unit Service and Repair.

13. 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 14.

NO -

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

14. 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 ground in the floor wire harness, driver's seat wire harness, driver's seat heater subharness, or driver's seat position sensor subharness; replace the faulty harness, then clear the DTC.�