DTC U1404 Dodge
Climate Control Unit Lost Communication with Relay Control Module (RM message)
Climate Control Unit Lost Communication with Relay Control Module (RM message)
Description
Poor communication between the Relay Control Module and the Climate Control Unit. NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in the B-CAN system diagnosis test mode A. If any of the following DTCs are indicated; B1005, B1959, B2162 or B1158, perform the relay control module input test. If no additional codes are present, perform the climate control unit troubleshooting.
Cause and Solution
Loose wire or poor connection on the climate control unit connector A (40P) Poor ground (G302) Blown fuse in the main under-hood fuse box Blown fuse in the under-dash fuse relay box Open circuit between the climate control unit and body ground Open circuit between the MICU and the climate control unit Faulty Climate Control Unit Faulty Gauge Control Module
Video Guide
Diagnostic Info
- DTC Code: U1404
- Brand: Dodge