B1505-31 Bank 'D' Motor #1 Speed/Position Sensor - No Signal: Action

NOTE: This DTC only applies to 18-way specification seating

Refer to the electrical circuit diagrams and check the rear seat cushion extension motor position sensor circuit for short circuit to ground, short circuit to power. Repair circuit as required. Clear DTC and retest
If fault persists, install a new rear seat cushion extension motor