DTC 71-2x
DTC 71-2x (71-20 to 71-29, 71-2A to 71-2F): Short in Driver's Seat Position Sensor1. Erase 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. If another DTC is indicated, go to the DTC troubleshooting index.
3. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
4. Disconnect the driver's airbag 4P connector from the cable reel.
5. Disconnect the driver's seat wire harness 2P connector (A) from the driver's seat position sensor (B).
6. Reconnect the battery negative cable.
7. Erase 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 battery negative cable, and wait for 3 minutes.
1O. Disconnect both seat belt tensioner 2P connectors (A).
11. Disconnect SRS unit connector B (28P) from the SRS unit.
12. Check resistance between the No.16 terminal of SRS unit connector B (28P) and body ground, and the No.28 terminal and body ground. There should be an open circuit, or at least 1 MOhm.
Is the resistance as specified?
YES - Faulty SRS unit, or poor contact 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 left side subharness 28P connector C803 (A) from the SRS main subharness connector C803 (B).
14. Check resistance between the No.16 terminal of SRS left side subharness 28P connector C803 and body ground, and between the No.28 terminal and body ground. There should be an open circuit, or at least 1 MOhm.
Is the resistance as specified?
YES - Short to ground in the SRS main subharness; replace the SRS main subharness.
NO - Go to step 15.
15. Disconnect driver's seat wire harness 2P connector C809 from the SRS left side subharness.
16. Check resistance between the No.1 terminal of driver's seat wire harness 2P connector C809 and body ground, and between the No.2 terminal and body ground. There should be an open circuit, or at least 1 MOhm.
Is the resistance as specified?
YES - Short to ground in the SRS left side subharness; replace the SRS left side subharness.
NO - Short to ground in the driver's seat wire harness; replace the driver's seat wire harness.