DTC B15EC: Backup Battery Degradation [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is set when the DCM (Telematics Transceiver) detects either of the following conditions.

The BUB (Back-Up Battery) charge level becomes less than the criteria.
The BUB (Back-Up Battery) was used for Automatic Collision Notification (ACN).

When this DTC is set, the BUB (Back-Up Battery) must be replaced.

BUB (Back-Up Battery) used up DTC B15EC is not reported in deactive mode.

DTC No.	DTC Detection Condition	Trouble Area
B15EC	BUB (Back-Up Battery) is used up.	BUB (Back-Up Battery)