DTC U0230: Lost Communication With Power Rear Gate Control Module

DTC detecting condition: 

No:  data is received from the power rear gate Control Module.

Trouble symptom: 

Coordination control of power rear gate Control Module does not operate properly.

1. CHECK CAN COMMUNICATION HARNESS 

   Perform the basic diagnostic procedure to check for fault in CAN communication harness. Ref. to LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

   Was the basic diagnostic procedure performed up to step 7?

   Yes:  Go to 2

   No:  Perform the basic diagnostic procedure. Ref. to LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

2. CHECK DTC (OTHER THAN U-CODE) 

   Check the displayed DTC.

   Is DTC other than U*** displayed? (Current code)

   Yes:  Perform the diagnosis for the displayed DTCs other than U-code.

   No:  Go to 3

3. CHECK DTC 

   Check the displayed DTC.

   Is DTC U0230 displayed? (Current code)

   Yes:  Go to 4

   No:  Go to 6

4. CHECK DTC 
   1. Check CAN communication circuit. Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK
   2. Turn the ignition switch to ON.
   3. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC U0230 displayed? (Current code)

   Yes:  Go to 5

   No:  Go to 6

5. CHECK DTC 

   Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC U0230 detected in several modules? (Current code)

   Yes:  Replace the power rear gate Control Module. Ref to POWER REAR GATE SYSTEM>POWER REAR GATE CONTROL MODULE

   No:  Replace the module that the DTC has been detected.

6. CHECK HARNESS 
   1. Shake the harness, and check for poor contact.
   2. Using the Subaru Select Monitor, read all DTCs. LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC U0230 displayed? (Current code)

   Yes:  Repair the poor contact of harness, or replace the harness.

   No:  Go to 7

7. CHECK CONNECTOR 

   Check the connector used for high speed CAN for poor contact.

   Is there poor contact of connector?

   Yes:  Repair the connector that has poor contact, or replace harness.

   No:  It is possible that temporary poor communication occurs. Delete the DTC.