DTC B15C0: Short in GPS Antenna; DTC B15C1: Open in GPS Antenna [12/2017 - 10/2022]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

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

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > 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 [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022] 

Result: 

NG 

See step  2

1. Remove the navigation antenna assembly.

   Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022]

2. Inspect the navigation antenna assembly.

   Refer to INSPECTION [12/2017 - 10/2020] , or refer to INSPECTION [10/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NAVIGATION ANTENNA ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022] 

Result: 

OK 

See step  3

1. Disconnect the antenna cord sub-assembly (I/P) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Antenna Cord Sub-assembly)
   *b	Front view of wire harness connector (to Navigation ECU)

2. Disconnect the navigation ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-3 - B-1 (GPS)	Always	Below 1 Ω
   A-3a - B-1a	Always	Below 1 Ω
   A-3 - Body ground	Always	10 kΩ or higher
   A-3a - 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. Replace the navigation ECU with a new one.

   Refer to REMOVAL [12/2017 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

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

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2020] , or refer to DTC CHECK / CLEAR [10/2020 - 10/2022]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (NAVIGATION ECU IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2022]