DTC U1232 Lost Communication With Rear/Side Radar Control Module

DTC DETECTING CONDITION:

No data is received from radar sensor.

TROUBLE SYMPTOM:

Cooperation control of radar sensor does not operate properly.

Step	Check	Yes	No
1 CHECK CAN COMMUNICATION HARNESS. Perform the basic diagnostic procedure to check for fault in CAN communication harness. <Ref. to BASIC DIAGNOSTIC PROCEDURE .>	Was the basic diagnostic procedure performed up to step 7?	Go to step 2 .	Perform the basic diagnostic procedure. <Ref. to BASIC DIAGNOSTIC PROCEDURE .>
2 CHECK DTC (OTHER THAN U-CODE). Check the displayed DTC.	Are DTCs other than U*** displayed?	Perform the diagnosis for DTCs other than the displayed U-code.	Go to step 3 .
3 CHECK DTC (CURRENT MALFUNCTION). Check the displayed DTC.	Is U1232 a current malfunction?	Go to step 4 .	Go to step 6 .
4 CHECK DTC (CURRENT MALFUNCTION). Check CAN communication circuit. <Ref. to CAN COMMUNICATION CIRCUIT CHECK .> Read the DTC using Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is U1232 a current malfunction?	Go to step 5 .	Go to step 6 .
5 CHECK DTC. Using the Subaru Select Monitor, read DTC of all the systems. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is the Subaru Rear Vehicle Detection data no-receive detected in several modules?	Replace the radar sensor LH. <Ref. to Radar Sensor .>	Replace the module that the DTC has been detected.
6 CHECK HARNESS. Shake the harness, and check for poor contact. Read the DTC using Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is U1232 a current malfunction?	Repair the poor contact of harness, or replace the harness.	Go to step 7 .
7 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.