Diagnostic Aids
- DTC B3809 could also set if the door unlock relay winding is open.
- If both DTC B3808 and B3809 are set as current, the battery positive voltage circuit or the LOCKS fuse could be open. If the LOCKS fuse is open, the cause is most likely one of the following:
- A short to ground in the relay battery positive voltage circuit
- A short to ground in the door lock actuator lock or unlock control circuits