Tests AN: LFC 14/DTC U2023 - Fault Received From External Node

PINPOINT TEST AN: LFC 14\DTC U2023 - FAULT RECEIVED FROM EXTERNAL NODE

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Normal Operation
The restraints control module (RCM) monitors the HS-CAN for a vehicle speed message from the anti-lock brake system (ABS) module. If the RCM receives an invalid or missing vehicle speed message, it will store diagnostic trouble code (DTC) U2023 in memory.

Fault Conditions
The RCM monitors for the following fault conditions:
- Missing message from the ABS module

Possible Causes
A fault received from external node can be caused by:
- damaged wiring, terminals or connectors.
- a faulted ABS module.
- a faulted RCM.