Remote Keyless Entry Inoperative

SYMPTOM
* REMOTE KEYLESS ENTRY INOPERATIVE

POSSIBLE CAUSES
- DRB displays bus error message
- Link to communication bus inoperative
- Power door lock switches inoperative
- RKE transmitter batteries defective-low voltage
- Door lock motor no operate w/jumper lock CTRL-GND
- Door lock control circuit open
- Door unlock control circuit open
- Fused B(+) circuit from IOD fuse open
- Passenger door module defective-lock CTRL function