DTC B15C0: GPS Antenna Connection Malfunction (short); DTC B15C1: GPS Antenna Connection Malfunction (break) [12/2019 - 10/2022]: Procedure

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. 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 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

NG 

See step  2

1. Remove the No. 2 antenna cord sub-assembly.

   Refer to REMOVAL [12/2019 - 10/2022]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (No. 2 Antenna Cord Sub-assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-3 - B-1	Always	Below 1 Ω
   A-3a - B-1a	Always	Below 1 Ω
   A-3 or B-1 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

OK 

See step  3

1. Remove the navigation antenna assembly.

   Refer to REMOVAL [12/2019 - 10/2022]

2. Inspect the navigation antenna assembly.

   Refer to INSPECTION [12/2019 - 11/2024]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NAVIGATION ECU. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

REPLACE NAVIGATION ANTENNA ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]