71-1x

SRS DTC Troubleshooting: 71-1x

DTC 71-1x ("x" can be 0 thru 9 or A thru F):

Open in the Driver's Seat Position Sensor

NOTE:

- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software Testing and Inspection, and retest.

1. Raise the driver's seat all the way up, and position all the way rearward.

2. Clear the DTCs with the HDS.

3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.

4. Check for DTCs with the HDS.

Is DTC 71-1x indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.

5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Check for these connector connections.

- Driver's seat position sensor 2P connector on the driver's seat wire harness Service and Repair.
- C601.

Are the connections OK?

YES -

Go to step 7.

NO -

Repair the poor connections, then clear the DTC, and retest. If DTC 71-1x is still present, go to step 7.

7. Disconnect the driver's seat position sensor 2P connector (A) on the driver's seat wire harness Service and Repair.






8. Install a jumper wire between driver's seat position sensor 2P connector on the driver's seat wire harness terminals No. 1 and No. 2.





9. Disconnect the negative cable from the battery, then wait at least 3 minutes.

10. Disconnect SRS unit connector B (39P) from the SRS unit.

11. Measure the resistance between SRS unit connector B (39P) terminal No. 23 and body ground. There should be less than 1.0 Ohms.





Is the resistance as specified?

YES -

Faulty driver's seat position sensor or SRS unit; replace the driver's seat position sensor Service and Repair, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit Service and Repair.

NO -

Open in the floor wire harness or the driver's seat wire harness; check for a poor ground at G602. if the ground is OK, replace the faulty harness, then clear the DTC.