DTC B15DB-87: Telematics Transceiver Missing Message [07/2022 - ]: Procedure

1. Disconnect the F126 telematics transceiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F126-20 (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
   F126-1 (+B) - Body ground	IG OFF	11 to 14 V
   F126-19 (IG2) - Body ground	IG ON	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 F130 radio receiver assembly connector.
2. Disconnect the F126 telematics transceiver connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F130-18 (USBV) - F126-15 (USBV)	Always	Below 1 Ω
   F130-17 (USBG) - F126-31 (USBG)	Always	Below 1 Ω
   F130-18 (USBV) or F126-15 (USBV) - Body ground	Always	10 kΩ or higher
   F130-17 (USBG) or F126-31 (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  3

1. With the radio receiver assembly connectors connected, disconnect the F126 telematics transceiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F126-31 (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
   F126-15 (USBV) - F126-31 (USBG)	IG ON	3 V or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [07/2022 - ] 

Result: 

OK 

See step  4

1. Disconnect the t6 radio receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Disconnect the t4 telematics transceiver connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   t6-1 (USB+) - t4-2 (USB+)	Always	Below 1 Ω
   t6-2 (USB-) - t4-1 (USB-)	Always	Below 1 Ω
   t6-3 (GND) - t4-3 (GND)	Always	Below 1 Ω
   t6-1 (USB+) or t4-2 (USB+) - Body ground	Always	10 kΩ or higher
   t6-2 (USB-) or t4-1 (USB-) - Body ground	Always	10 kΩ or higher
   t6-3 (GND) or t4-3 (GND) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the telematics transceiver with a new one.

   Refer to REMOVAL [07/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Turn the ignition switch off.
3. Turn the ignition switch to ON and wait for 90 seconds.
4. Turn the ignition switch off.
5. Turn the ignition switch to ON and wait for 90 seconds.
6. Using the Techstream, recheck for DTCs and proceed to the following step.

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC B15DB87 is output	B

Result: 

A 

TELEMATICS TRANSCEIVER IS DEFECTIVE 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [07/2022 - ]