MDX V6-3471cc 3.5L (2002)
8. Check for voltage pulse between the No.3 terminal of the front up-down position sensor and body ground when the front up-down switch moves
up and down.
Does voltage pulse from 0 to about 5 V alternately?
YES - Replace the power seat control unit.
NO - Check for a short in the wire. If the wire is OK, the front up-down position sensor is faulty; replace the front up-down motor assembly.
Rear Up-Down Position Sensor:
1. Raise the driver's power seat up with the power seat up-down switch, then remove the power seat.
NOTE: Be careful not to scratch the interior trim.
2. Disconnect the power seat control unit connectors.
3. Disconnect the 4P connector from the rear up-down position sensor.
4. Check for continuity between the No.2 terminal of the rear up-down position sensor and C12 terminal of the power seat control unit.
Is there continuity?
YES - Go to step 5.
NO - Repair open in the BRN/BLK wire.
5. Check for continuity between the No.3 terminal of the rear up-down position sensor and C11 terminal of the power seat control unit.
Is there continuity?
YES - Go to step 6.
