DTC 71-2x
DTC71-2x (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 Trouble Code Descriptions.
3. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
4. Disconnect the SRS floor harness 2P connector (A) from the driver's seat position sensor (B).
5. Reconnect the battery negative cable.
6. Erase the DTC memory.
7. Read the DTC.
Is DTC 71-2x indicated?
YES - Go to step 8.
NO - Faulty driver's seat position sensor (DTC 71-1x should be indicated); replace the driver's seat position sensor.
8. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
9. Disconnect both seat belt tensioner 2P connectors.
10. Disconnect SRS unit connector B (28P) from the SRS unit.
11. 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 MOhms.
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 - Short to ground in the SRS floor harness; replace the SRS floor harness.