Toyota CH-R Service Manual: Ignition Switch Signal Malfunction (B15C6)

Toyota CH-R Service Manual / Cellular Communication / Safety Connect System / Ignition Switch Signal Malfunction (B15C6)

DESCRIPTION

If vehicle movement (10 km/h (6 mph) or more for 10 seconds) is detected based on the location data sent from the radio receiver assembly even when the telematics transceiver detects that the ignition switch is off, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C6

Ignition Switch Signal Malfunction

IG signal error
  • Harness or connector
  • DCM (Telematics transceiver)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

Body Electrical > Telematics > Clear DTCs

(b) Recheck for DTCs and check if the same DTC is output again.

Click here

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

B15C6 is not output.

A

B15C6 is output.

B
A

USE SIMULATION METHOD TO CHECK

B

2.

CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - BATTERY AND BODY GROUND)

(a) Disconnect the DCM (Telematics Transceiver) connector.

*a

Front view of wire harness connector

(to DCM [Telematics Transceiver])

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F134-4 (E) - Body ground

Always

Below 1 Ω

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F134-7 (IG2) - Body ground

Ignition switch ON

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not exchange the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

    Manual Button Malfunction (B15C5)
    DESCRIPTION This DTC is set when the DCM (Telematics Transceiver) detects an open or short circuit in the manual (SOS) switch. DTC No. Detection Item DTC Detection ...

    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 ...

    Other materials:

    Toyota CH-R Service Manual > Lighting System: Fail-safe Chart
    FAIL-SAFE CHART FAIL-SAFE FUNCTION (for LED Headlight) (a) Headlight ECU sub-assembly (1) The headlight ECU sub-assemblies stop light operation if any of the following malfunctions are detected. Malfunction Multi-information Display Warning DTC Output ...

    Toyota CH-R Service Manual > Vehicle Stability Control System: Calibration
    CALIBRATION DESCRIPTION (a) Refer to the table below and then perform the necessary operation according to the part to be replaced in order to perform calibration. Parts to be Replaced Necessary Operation Skid control ECU (brake actuator assembly) ...

    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
    0.015