DTC: U0252: Lost Communication with Lighting Control Module-Rear "B": Description

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.

The PSCM monitors the HS-CAN messages when the ignition has been on for more than 5 seconds, the voltage to the PSCM is greater than 6.5 volts and there are no DTCs present inhibiting PSCM operation.

DTC U0252:00 (Lost Communication with Lighting Control Module - Rear "B": No Sub Type Information) - This DTC sets when communication between the PSCM and the RLCMB fails. For a list of the messages sent to the PSCM from the RLCMB, refer to the Network Message List in Description and Operation in POWER STEERING SYSTEM . If messages are missing for more than the allotted time, DTC U0252:00 is set.