DTC B15DB: Telematics Transceiver Disconnected [04/2018 - 08/2020]: Procedure

1. Disconnect the G9 DCM (telematics transceiver) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G9-4 (E) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G9-1 (+B) - G9-4 (E)	Always	11 to 14 V
   G9-8 (ACC) - G9-4 (E)	Engine switch on (ACC)	11 to 14 V
   G9-7 (IG2) - G9-4 (E)	Engine 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

1. Disconnect the G1 radio and display receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G1-11 (USBG) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G1-10 (USBV) - G1-11 (USBG)	Engine switch on (IG)	4.75 to 5.25 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2018 -] 

Result: 

OK 

See step  3

1. Disconnect the G1 radio and display receiver assembly connector.
2. Disconnect the G11 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G1-10 (USBV) - G11-5 (USBV)	Always	Below 1 Ω
   G1-11 (USBG) - G11-3 (USBG)	Always	Below 1 Ω
   G1-10 (USBV) or G11-5 (USBV) - Body ground	Always	10 kΩ or higher
   G1-11 (USBG) or G11-3 (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

1. Check the installation condition.
   1. Check the USB communication lines between the radio and display receiver assembly and DCM (telematics transceiver) for any installation or connection problems.
2. Disconnect the G108 radio and display receiver assembly connector.
3. Disconnect the G11 DCM (telematics transceiver) connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G108-1 (USB+) - G11-2 (USB+)	Always	Below 1 Ω
   G108-2 (USB-) - G11-1 (USB-)	Always	Below 1 Ω
   G108-3 (USBS) - G11-6 (USBS)	Always	Below 1 Ω
   G108-1 (USB+) or G11-2 (USB+) - Body ground	Always	10 kΩ or higher
   G108-2 (USB-) or G11-1 (USB-) - Body ground	Always	10 kΩ or higher
   G108-3 (USBS) or G11-6 (USBS) - Body ground	Always	10 kΩ or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

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

   Refer to REMOVAL [04/2018 - 08/2020]

2. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

3. Turn the engine switch off.
4. Turn the engine switch on (IG) and wait for 90 seconds.
5. 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 AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2018 -]