71-2x

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

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. Clear the DTC memory. Reading and Clearing Diagnostic Trouble Codes

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

3. Read the DTC. Reading and Clearing Diagnostic Trouble Codes

Is DTC 71-2x indicated?
YES - Go to step 4.

NO - Intermittent failure, 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).

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

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

7. Reconnect the negative cable to the battery.

8. Clear the DTC memory.

9. Read the DTC. Reading and Clearing Diagnostic Trouble Codes

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 seat belt buckle tensioner 4P connectors Service and Repair and both seat belt tensioner 4P connectors. Service and Repair

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

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. 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.