Pinpoint Test Z : U0140:00, U0422:68: Notes
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Wiring Diagram Auxiliary Climate Control for schematic and connector information.
Normal Operation and Fault Conditions
Modules send messages on the vehicle communication networks. If data messages from the BCM are missing for 5 seconds or longer, the RHVAC control module sets a DTC.
RHVAC Control Module DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | Sets in continuous memory in the RHVAC control module if data messages received from the BCM are missing for 5 seconds or longer. |
| U0422:68 | Invalid Data Received From Body Control Module: Event Information | Sets in continuous memory in the RHVAC control module if data messages received from the BCM are missing for 5 seconds or longer. |
Possible Sources
- Communication concern
- BCM
- RHVAC control module