DTC U1E08: Lost Communication Of Authentication Data With VDC PU-Bus

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

DTC detecting condition:

The control module in which the DTC was detected does not receive data from VDC Control Module.

Trouble symptom:

The warning light of the control module in which the DTC was detected illuminates.

CAUTION:

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

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, perform the clear memory of the control module in which the DTC was detected. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
3. Using the Subaru Select Monitor, read the DTC of the control module in which it was detected. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)
Is a DTC other than DTC U1E08 recorded as current code?

Yes : Perform the diagnosis of DTCs other than DTC U1E08 first.

No : Go to 2.
CHECK LAN SYSTEM .
Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

Is the check result OK?

Yes : Finish the diagnosis.

No : In order to check poor contact of the control module in which the DTC was detected, reconnect it, Go to 1.

If the DTC is still detected, replace the control module in which the DTC was detected.