DTC 71-2x

DTC 71-2x ("x" can be 0 thru 9 or A thru F): Short 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 71-2x 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, troubleshoot the DTC.

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






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






6. Reconnect the negative cable to the battery.
7. Clear the DTC memory.
8. Read the DTC.

Is DTC 71-2x indicated?

YES - Go to step 9.

NO - Faulty driver's seat position sensor; replace the driver's seat position sensor.

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
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 terminal of SRS unit connector B (28P) and body ground, and the No.6 terminal and body ground. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Faulty SRS unit, or poor connection at SRS unit connector B (28P) and the SRS unit. Check the connection; if the connection is OK, 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 terminal of SRS harness 28P connector C854 and body ground, and between the No.28 terminal and body ground. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Short to ground 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 terminal of driver's seat position sensor subharness 2P connector C605* or driver's seat wire harness 2P connector C606 and body ground, and between the No.2 terminal and body ground. There should be an open circuit or at least 1 Mohms.
*: without power seat






Is the resistance as specified?

YES - Short to ground in the SRS harness; replace the SRS harness.

NO - Short to ground in the driver's seat wire harness; replace the driver's seat wire harness.