DTC B15CB-11: Telephone Main Antenna Circuit Short to Ground; DTC B15CB-13: Telephone Main Antenna Circuit Open [12/2019 - ]: Procedure

1. Turn the ignition switch off.
2. Connect the GTS to the DLC3.
3. Turn the ignition switch to ON and wait for 10 seconds or more.
4. Turn the GTS on.
5. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

6. Check for DTCs and check that no DTCs are output.

   Body Electrical > Telematics > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

Result: 

NG 

See step  2

1. Disconnect the telephone and GPS antenna assembly (for Roof Side) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Assembly (for Roof Side))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 - 4a	Always	9 to 11 kΩ

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side) 

Refer to REMOVAL [12/2019 - ]

Result: 

OK 

See step  3

1. Disconnect the antenna connector from the telephone and GPS antenna (for Roof Side).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (No. 4 Antenna Cord Sub-assembly))

2. Disconnect the antenna connector from the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (No. 4 Antenna Cord Sub-assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I-4 - H-6	Always	Below 1 Ω
   I-4a - H-6a	Always	Below 1 Ω
   I-4 or H-6 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 4 ANTENNA CORD SUB-ASSEMBLY) 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - 11/2024] , or refer to REMOVAL [11/2024 - ]

Result: 

OK 

See step  4

1. Disconnect the antenna connector from the telephone and GPS antenna cord (No. 4 antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))

2. Disconnect the antenna connector from the telephone and GPS antenna cord (Antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G-6 - F-6	Always	Below 1 Ω
   G-6a - F-6a	Always	Below 1 Ω
   G-6 or F-6 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY) 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - 11/2024] , or refer to REMOVAL [11/2024 - ]

Result: 

OK 

See step  5

1. Disconnect the antenna connector from the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))

2. Disconnect the antenna connector from the DCM (telematics transceiver).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E-6 - C-1 (TEL MAIN)	Always	Below 1 Ω
   E-6a - C-1a	Always	Below 1 Ω
   E-6 or C-1 (TEL MAIN) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - 11/2024] , or refer to REMOVAL [11/2024 - ]

Result: 

OK 

See step  6

1. Replace the telephone and GPS antenna assembly (for Roof Side) with a new or known good one and check if the same problem occurs again.

   Refer to REMOVAL [12/2019 - ]

   OK

   The system returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  7

1. Replace the DCM (Telematics Transceiver).

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM DCM ACTIVATION 

Refer to DCM ACTIVATION [12/2019 - ]