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, 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 (see COMPONENT REPLACEMENT/INSPECTION AFTER DEPLOYMENT ).
Before doing this troubleshooting procedure, review SRS Precautions and Procedures (see PRECAUTIONS AND PROCEDURES ), General Troubleshooting Information (see DTC (DIAGNOSTIC TROUBLE CODES) ), and 12 Volt Battery Terminal Disconnection and Reconnection (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
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 (see SRS UNIT UPDATE ), and retest.

Raise the driver's seat all the way up.
Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for DTCs with the HDS (see HOW TO CLEAR DTCS ).
Is DTC 71-2x 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.
Turn the ignition switch to LOCK (0), then wait for 10 seconds.
Remove the outer recline cover (see RECLINE COVER REMOVAL/INSTALLATION ).
Disconnect the driver's seat position sensor 2P connector (A) on the driver's seat position sensor subharness.

Fig 1: Identifying Driver's Seat Position Sensor 2P Connector On Driver's Seat Position Sensor Subharness
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for DTCs with the HDS (see HOW TO CLEAR DTCS ).
Is DTC 71-2x indicated?

YES -Go to step 11.

NO -Faulty driver's seat position sensor; replace the driver's seat position sensor (see DRIVER'S SEAT POSITION SENSOR REPLACEMENT ), then clear the DTC.
Turn the ignition switch to LOCK (0).
Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
Disconnect SRS unit connector B (39P) from the SRS unit (see step 10 ).
Measure the resistance between body ground and SRS unit connector B (39P) terminal No. 2.

Fig 2: Measuring Resistance Between Body Ground And SRS Unit Connector B (39P) Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there an open circuit or at least 1 MΩ?

YES -Faulty driver's seat position sensor or SRS unit; replace the driver's seat position sensor (see DRIVER'S SEAT POSITION SENSOR REPLACEMENT ), then clear the DTC, and retest. If the DTC is still present, replace the SRS unit (see SRS UNIT REPLACEMENT ).

NO -Short to ground in the floor wire harness or the driver's seat wire harness; replace the faulty harness, then clear the DTC.