Toyota 4Runner: Backup Battery Degradation (B15EC)

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Cellular Communication / Safety Connect System / Backup Battery Degradation (B15EC)

DESCRIPTION

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

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

When this DTC is stored, the BUB (Back-Up Battery) must be replaced. BUB (Back-Up Battery) degradation DTC B15EC is not reported in the deactive mode.

DTC Code	DTC Detection Condition	Trouble Area
B15EC	The BUB (Back-Up Battery) is deteriorated.	BUB (Back-Up Battery)

CAUTION / NOTICE / HINT

NOTICE:

If this DTC is stored, be sure to replace the BUB (Back-Up Battery) with a new one.
After the BUB (Back-Up Battery) is replaced, it is necessary to clear this DTC.

PROCEDURE

1.	CHECK FOR DTC

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Perform "Health Check" and check for current DTCs (See page ).

Result

Result	Proceed to
DTC B15EC is output	A
DTC B15EC is not output	B

REPLACE BUB (BACK-UP BATTERY)

CHECK FOR INTERMITTENT PROBLEMS

Data List / Active Test

DATA LIST / ACTIVE TEST 1. DATA LIST NOTICE: In the table below, the valves listed under "Normal Condition" are reference values. Do not depend solely on these reference values when dec ...

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" bel ...

Other materials about Toyota 4Runner:

Installation
INSTALLATION PROCEDURE 1. INSTALL CENTER CONTROL ABSORBER BRACKET LH (a) Install the center control absorber bracket with the 2 bolts. Torque: 29 N·m {296 kgf·cm, 21 ft·lbf} 2. INSTALL CENTER CONTROL ABSORBER BRACKET RH HINT: Use the same procedure ...

Detecting Vehicle Submersion (B2277)
DESCRIPTION This DTC is stored when a malfunction in the submersion monitor circuit inside the power management control ECU is detected. HINT: When the power management control ECU is replaced with a new one and the cable is connected to the negative (- ...