DTC 71-1x

DTC 71-1x ("x" can be 0 thru 9 or A thru F): Open in Driver's Seat Position Sensor

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.

1. Clear the DTC memory.
2. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 71-1x indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures If another DTC is indicated, go to the DTC Troubleshooting Index. DTC List - Supplemental Restraint System

3. Check the connection between the driver's seat wire harness or driver's seat position sensor subharness (without power seat) 2P connector and the driver's seat position sensor.
4. Clear the DTC memory.
5. Check for a DTC.

Is DTC 71-1x indicated?

YES - Go to step 6.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures If another DTC is indicated, troubleshoot the DTC.

6. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
7. Disconnect the driver's airbag 4P connector (A) from the cable reel.






8. Disconnect the driver's seat wire harness or driver's seat position sensor subharness (without power seat) 2P connector from the driver's seat position sensor (A).






9. Connect the No.1 and No.2 terminals of the driver's seat wire harness 2P connector with a jumper wire.
10. Disconnect both seat belt tensioner 2P connectors (A).
11. Disconnect SRS unit connector B (28P) from the SRS unit.
12. Measure the resistance between the No.5 and No.6 terminals of SRS unit connector B (28P). There should be less than 1.0 ohm.






Is the resistance as specified?

YES - Faulty driver's seat position sensor or SRS unit; replace the driver's seat position sensor. If the problem is still present, replace the SRS unit.

NO - Go to step 13.

13. Disconnect SRS harness 28P connector C854 (A) from SRS subharness connector C854 (B).






14. Measure the resistance between the No. 27 and No. 28 terminals of SRS harness 28P connector C854. There should be less than 1.0 ohm.






Is the resistance as specified?

YES - Open in the SRS subharness; replace the SRS subharness.

NO - Go to step 15.

15. Disconnect driver's seat position sensor subharness 2P connector C605* or driver's seat wire harness 2P connector C606 from the SRS harness.
*: without power seat

16. Measure the resistance between the No. 1 and No. 2 terminals of driver's seat position sensor subharness 2P connector C605* or driver's seat wire harness 2P connector C606. There should be less than 1.0 ohm.
*: without power seat






Is the resistance as specified?

YES - Open in the SRS harness; replace the SRS harness.

NO - Open in the driver's seat wire harness; replace the driver's seat wire harness.