DTC B15C1-11: GNSS Antenna Circuit Short to Ground; DTC B15C1-13: GNSS Antenna Circuit Open [10/2019 - 10/2022]: Procedure

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

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Telematics > Clear DTCs 

6. Recheck for DTCs.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   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 [11/2018 - ] 

Result: 

NG 

See step  2

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Telephone and GPS Antenna [No. 1 Amplifier Antenna Assembly])
   *b	Front view of wire harness connector (to Telephone and GPS Antenna Cord [No. 3 Antenna Cord Sub-assembly])

2. Disconnect the telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) from the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-5 - B-1	Always	Below 1 Ω
   A-5a - B-1a	Always	Below 1 Ω
   A-5 or B-1 - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK	A
   NG	B

Result: 

B 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 4 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [11/2018 - ] 

Result: 

A 

See step  3

1. Disconnect the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) from the telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Telephone and GPS Antenna Cord [No. 4 Antenna Cord Sub-assembly])
   *b	Front view of wire harness connector (to Telephone and GPS Antenna Cord [Antenna Cord Sub-assembly])

2. Disconnect the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) from the telephone and GPS antenna cord (antenna cord sub-assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B-1 - C-1	Always	Below 1 Ω
   B-1a - C-1a	Always	Below 1 Ω
   B-1 or C-1 - 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 [11/2018 - ] 

Result: 

OK 

See step  4

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Telephone and GPS Antenna Cord [No. 3 Antenna Cord Sub-assembly])
   *b	Front view of wire harness connector (to Telephone and GPS Antenna Cord [No. 2 Antenna Cord Sub-assembly])

2. Disconnect the telephone and GPS antenna cord (antenna cord sub-assembly) from the telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C-1 - E-1	Always	Below 1 Ω
   C-1a - E-1a	Always	Below 1 Ω
   C-1 or E-1 - 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 [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022] 

Result: 

OK 

See step  5

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Telephone and GPS Antenna Cord [Antenna Cord Sub-assembly])
   *b	Front view of wire harness connector (to DCM [Telephone Transceiver Assembly])

2. Disconnect the telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) from the DCM (telephone transceiver assembly).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [10/2019 - 10/2022] 

Result: 

OK 

See step  6

1. Replace the telephone and GPS antenna (No. 1 amplifier antenna assembly) with a known good one and check if the same problem occurs again.

   Refer to REMOVAL [11/2018 - ]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Telematics > Clear DTCs 

3. Recheck for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Telematics > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (TELEPHONE AND GPS ANTENNA [NO. 1 AMPLIFIER ANTENNA ASSEMBLY] IS DEFECTIVE) 

Result: 

NG 

See step  7

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

   Refer to REMOVAL [10/2019 - 10/2022]

   NOTE:

   • The ignition switch must be off.
   • Do not exchange the DCM (telephone transceiver assembly) with one from another vehicle.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [10/2019 - 10/2022]