DTC 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 and General Troubleshooting Information.

1. Clear the DTC memory.
2. Turn the ignition switch to 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 to LOCK (0). Disconnect the negative cable from the battery, then wait for 3 minutes.
4. Disconnect the driver's seat wire harness 2P connector from the driver's seat position sensor (A).






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

Is DTC 71-2x indicated?

YES - Go to step 8.

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

8. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait for 3 minutes.
9. Disconnect both seat belt tensioner 4P connectors and both seat belt buckle tensioner 4P connectors.
10. Disconnect SRS unit connector B (28P) from the SRS unit.
11. Measure the resistance between the No. 5 and No. 6 terminals of SRS unit connector B (28P). There should be an open circuit or at least 1 Mohms






Is the resistance as specified?

YES - Go to step 12.

NO - Short in the floor wire harness, driver's seat wire harness, or the seat position sensor harness; replace the faulty harness.

12. Measure the resistance between the No. 5 terminal of SRS unit connector B (28P) and body ground, and between 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 driver's seat position sensor, or the SRS unit; replace the driver's seat position sensor. If the problem is still present, replace the SRS unit.

NO - Short in the floor wire harness or the seat position sensor harness; replace the faulty harness.