Toyota CH-R Service Manual: Backup Battery Degradation (B15EC)

Toyota CH-R Service Manual / Cellular Communication / Safety Connect System / Backup Battery Degradation (B15EC)

DESCRIPTION

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) degradation DTC B15EC is not reported in deactive mode.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15EC

Backup Battery Degradation

BUB (Back-Up Battery) is used up.

BUB (Back-Up Battery)

CAUTION / NOTICE / HINT

NOTICE:

  • If this DTC is set, be certain 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.
  • The BUB (Back-Up Battery) must not be replaced while an ACN call is in progress.

    Click here

HINT:

Before performing this diagnostic procedure, make sure to perform Health Check and confirm that the DCM/VIN registration information is correct.

Click here

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON and wait for 10 seconds.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTC B15EC is output

A

DTC B15EC is not output

B
A

REPLACE BUB (BACK-UP BATTERY)

B

CHECK FOR INTERMITTENT PROBLEMS

    Telephone Microphone Error (B1572)
    DESCRIPTION This DTC is set when the DCM (Telematics Transceiver) detects a malfunction in the telephone microphone assembly circuit. DTC No. Detection Item DTC De ...

    Short in Telephone SUB Antenna Circuit (B1536,B1537)
    DESCRIPTION These DTCs are stored when the DCM (Telematics Transceiver) detects an open or a short in the telephone and GPS antenna assembly (for Front Side) circuit. The DCM (Telematics Transcei ...

    Other materials:

    Toyota CH-R Service Manual > Power Window Control System: Diagnostic Trouble Code Chart
    DIAGNOSTIC TROUBLE CODE CHART Power Window Control System DTC No. Detection Item Link B2311 Power Window Motor Malfunction B2311 Power Window Motor Malfunction ...

    Toyota CH-R Service Manual > Can Communication System: Skid Control ECU Communication Stop Mode
    DESCRIPTION Detection Item Symptom Trouble Area Skid Control ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the " ...

    Toyota C-HR (AX20) 2023-2025 Owner's Manual

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0123