Code No.U0331 ECU internal error

JUDGMENT CRITERIA

If the ETACS-ECU error counter value is detected to be "255," the diagnosis code No. U0331 is set, and the ETACS-ECU is reset. The diagnosis code No. U0331 exists only for the past trouble.

PROBABLE CAUSES

Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.

Check again if the diagnosis code is set to the ETACS-ECU.

(1)Erase the diagnosis code.

(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.

(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?

Replace the ETACS-ECU.

The diagnosis is complete.