Here's the pinpoint test for the TRS from my manual. Since your code points to the TRS circuit problem and it seems like many people on here had the problem with the sensor, I would swap the part (about $30 i think). And here are the images of the connector and circuit
http://community.webshots.com/album/561644596QuroWT
Hope this helps!
PINPOINT TEST D: DIGITAL TRANSMISSION RANGE (TR) SENSOR
Note:
Refer to the Digital Transmission Range (TR) Sensor Connector illustration preceding these pinpoint tests.
Note:
Refer to the Digital Transmission Range (TR) Sensor Diagnosis Chart preceding these pinpoint tests.
D1: VERIFY DIAGNOSTIC TROUBLE CODES
D2: VERIFY DIGITAL TRANSMISSION RANGE SENSOR ALIGNMENT
D3: VERIFY SHIFT CABLE/LINKAGE ADJUSTMENT
D4: CHECK ELECTRICAL SIGNAL OPERATION
D5: CHECK ELECTRICAL SYSTEM OPERATION (DIGITAL TR AND PCM)
D6: CHECK DIGITAL TRANSMISSION RANGE SENSOR OPERATION
D7: CHECK PCM HARNESS CIRCUITS FOR OPENS
D8: CHECK PCM HARNESS CIRCUITS FOR SHORT TO GROUND OR POWER
D9: CHECK FOR SHORT BETWEEN TR/PCM INPUT SIGNAL CIRCUITS
D10: CHECK THE NON-PCM INTERNAL CIRCUITS OF SENSOR