If any abnormality is found with the ETACS-ECU, the ETACS-ECU stores the diagnosis code
No. U1507.
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)On completion, check that the diagnosis code is reset.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunctions ).
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunctions 
Replace the ETACS-ECU.