DTC U0327: Software Incompatibility With Vehicle Security Control Module

DTC detecting condition:

No data is received from keyless access control module.

Trouble symptom:

Cooperation control of keyless access does not operate properly.

CAUTION:

Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to LAN SYSTEM (DIAGNOSTICS)>General Description> CAUTION .

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 .
CHECK DTC (OTHER THAN U-CODE) .
Check the displayed DTC.

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

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

No : Go to 3.
CHECK DTC .
Check the displayed DTC.

Is DTC U0327 displayed? (Current code)

Yes : Go to 4.

No : Go to 6.
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)>OPERATION .
Is DTC U0327 displayed? (Current code)

Yes : Go to 5.

No : Go to 6.
CHECK DTC .
Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>OPERATION .

Is DTC U0327 detected in several modules? (Current code)

Yes : Replace the keyless access control module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE .

No : Replace the module that the DTC has been detected.
CHECK HARNESS .
1. Shake the harness, and check for poor contact.
2. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>OPERATION .
Is DTC U0327 displayed? (Current code)

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

No : Go to 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.