DTC U0452: Invalid Data Received From Restraints Control Module: Trouble Symptom

WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Cooperation control with airbag does not operate properly.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE .	Was the basic diagnostic procedure performed up to step 8?	Go to step 2 .	Perform the basic diagnostic procedure. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >
2 CHECK DTC . Check the displayed DTC.	Are DTCs other than U*** displayed?	Perform the diagnosis according to DTC.	Go to step 3 .
3 CHECK DTC . Check the displayed DTC.	Is DTC for the bus off or the data no-receive displayed?	Perform the diagnosis according to DTC.	Go to step 4 .
4 CHECK DTC . Check the displayed DTC.	Is U0452 a current malfunction?	Go to step 5 .	Go to step 9 .
5 CHECK DTC . Turn the ignition switch to OFF. Disconnect the A/B Control Module connector. Connect the disconnected connectors. Read the DTC using Subaru Select Monitor.	Is U0452 a current malfunction?	Go to step 6 .	Go to step 9 .
6 CHECK DTC . Using the Subaru Select Monitor, read DTC of all the systems.	Is the airbag data abnormal detected in several modules?	Replace the A/B Control Module. < Ref. to AIRBAG CONTROL MODULE . >	Go to step 7 .
7 REPLACE MODULE . Replace the A/B Control Module. Read the DTC using Subaru Select Monitor.	Is U0452 a current malfunction?	Go to step 8 .	System is normal.
8 CHECK MODULE . Reinstall the A/B Control Module. Replace the module that the DTC has been detected. Read the DTC using Subaru Select Monitor.	Is U0452 a current malfunction?	Replace the A/B Control Module. < Ref. to AIRBAG CONTROL MODULE . >	System is normal.
9 CHECK HARNESS . Shake the harness, and check for poor contact. Using the Subaru Select Monitor, read DTC of CAN system.	Is U0452 a current malfunction?	Repair the poor contact of harness, or replace the harness.	Go to step 10 .
10 CHECK CONNECTOR . Check the connector used for high speed CAN for poor contact.	Is there poor contact of connector?	Repair the connector that has poor contact, or replace harness.	It is possible that temporary poor communication occurs. Delete the DTC.