Toyota CH-R Service Manual: Telematics Transceiver Disconnected (B15DB)

DESCRIPTION

If the radio and display receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the ignition switch is turned on (ACC) and the radio and display receiver assembly confirms that the information is missing by checking past DCM (telematics transceiver) recognition information (registered information), this DTC will be stored.

The telematics system uses USB communication between devices. If an open, short, short to +B or short to ground occurs in the USB circuit, communication is interrupted and the telematics system will not operate normally.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B15DB	Telematics Transceiver Disconnected	DCM (telematics transceiver) disconnected	Harness or connector DCM (telematics transceiver) DCM (telematics transceiver) power source circuit Radio and display receiver assembly

HINT:

This DTC may be stored due to environmental reasons such as electrical noise or interference.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON and wait for 90 seconds.

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.	CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) POWER SOURCE)

(a) Disconnect the DCM (telematics transceiver) connector.

(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 F134-1 (+B) - F134-4 (E) Ignition switch off 11 to 14 V F134-8 (ACC) - F134-4 (E) Ignition switch ACC 11 to 14 V F134-7 (IG2) - F134-4 (E) Ignition switch to ON 11 to 14 V

*a Front view of wire harness connector (to DCM (Telematics Transceiver))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the F130 radio and display receiver assembly connector.

(b) Disconnect the F133 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F130-10 (USBV) - F133-5 (USBV)	Always	Below 1 Ω
F130-11 (USBG) - F133-3 (USBG)	Always	Below 1 Ω
F130-10 (USBV) or F133-5 (USBV) - Body ground	Always	10 kΩ or higher
F130-11 (USBG) or F133-3 (USBG) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Disconnect the radio and display receiver assembly connector.

(b) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition F130-11 (USBG) - Body ground Always Below 1 Ω

*a Component without harness connected (Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F130-10 (USBV) - F130-11 (USBG)	ignition switch ACC	4.75 to 5.25 V

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

5.	CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the F133 DCM (telematics transceiver) connector.

(b) Disconnect the F136 radio and display receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition F133-2 (USB+) - F136-1 (USB+) Always Below 1 Ω F133-1 (USB-) - F136-2 (USB-) Always Below 1 Ω F133-6 (USBS) - F136-3 (USBS) Always Below 1 Ω F133-2 (USB+) or F136-1 (USB+) - Body ground Always 10 kΩ or higher F133-1 (USB-) or F136-2 (USB-) - Body ground Always 10 kΩ or higher F133-6 (USBS) or F136-3 (USBS) - Body ground Always 10 kΩ or higher

*a Front view of wire harness connector (to DCM (telematics transceiver)) *b Front view of wire harness connector (to Radio and Display Receiver Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.	CHECK DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) with a new one.

Click here

(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(c) Turn the ignition switch off.

(d) Turn the ignition switch to ON and wait for 90 seconds.

(e) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY