DTC B15DB: Telematics Transceiver Disconnected [06/2018 - 10/2019]: Procedure
WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) POWER SOURCE)
- Disconnect the G10 DCM (telematics transceiver) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G10-4 (E) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition G10-1 (+B) - G10-4 (E) Power switch off 11 to 14 V G10-8 (ACC) - G10-4 (E) Power switch on (ACC) 11 to 14 V G10-7 (IG2) - G10-4 (E) Power switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- INSPECT RADIO RECEIVER ASSEMBLY
- Disconnect the G2 radio receiver assembly connector.
- Measure the resistance according to the value(s) in the table below.
*a Component without harness connected
(Radio Receiver Assembly)Standard Resistance
Tester Connection Condition Specified Condition G2-11 (USBG) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition G2-10 (USBV) - G2-11 (USBG) Power switch on (IG) 4.75 to 5.25 V Result
Proceed to OK NG
Result:
NG
REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020]
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))
- Disconnect the G2 radio receiver assembly connector.
- Disconnect the G109 DCM (telematics transceiver) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G2-10 (USBV) - G109-5 (USBV) Always Below 1 Ω G2-11 (USBG) - G109-3 (USBG) Always Below 1 Ω G2-10 (USBV) or G109-5 (USBV) - Body ground Always 10 kΩ or higher G2-11 (USBG) or G109-3 (USBG) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))
- Check the installation condition.
- Check the USB communication lines between the radio receiver assembly and DCM (telematics transceiver) for any installation or connection problems.
- Disconnect the G119 radio receiver assembly connector.
- Disconnect the G109 DCM (telematics transceiver) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G119-1 (USB+) - G109-2 (USB+) Always Below 1 Ω G119-2 (USB-) - G109-1 (USB-) Always Below 1 Ω G119-3 (USBS) - G109-6 (USBS) Always Below 1 Ω G119-1 (USB+) or G109-2 (USB+) - Body ground Always 10 kΩ or higher G119-2 (USB-) or G109-1 (USB-) - Body ground Always 10 kΩ or higher G119-3 (USBS) or G109-6 (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 Receiver Assembly)Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 5
- Check the installation condition.
- REPLACE DCM (TELEMATICS TRANSCEIVER)
- Replace the DCM (telematics transceiver) with a new one.
Refer to REMOVAL [06/2018 - 10/2019]
- Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
- Turn the power switch off.
- Turn the power switch on (IG) and wait for 90 seconds.
- Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
OK
END
Result:
NG
REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020]
- Replace the DCM (telematics transceiver) with a new one.