DTC B15C0: GPS Antenna Connection Malfunction (short); DTC B15C1: GPS Antenna Connection Malfunction (break) [10/2020 - ]: 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 [10/2020 - 08/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2021 - ] 

Result: 

NG 

See step  2

1. Remove the antenna cord sub-assembly (for Front Side).

   Refer to REMOVAL [10/2020 - ]

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

   Standard Resistance

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Antenna Cord Sub-assembly (for Front Side))

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Antenna Cord Sub-assembly (for Front Side))

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ANTENNA CORD SUB-ASSEMBLY (for Front Side). Refer to  REMOVAL [10/2020 - ] 

Result: 

OK 

See step  3

1. Remove the antenna cord sub-assembly (for Navigation Antenna).

   Refer to REMOVAL [10/2020 - ]

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

   Standard Resistance

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Antenna Cord Sub-assembly (for Navigation Antenna))

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Antenna Cord Sub-assembly (for Navigation Antenna))

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ANTENNA CORD SUB-ASSEMBLY (for Navigation Antenna). Refer to  REMOVAL [10/2020 - ] 

Result: 

OK 

See step  4

1. Remove the navigation antenna assembly.

   Refer to REMOVAL [10/2020 - ]

2. Inspect the navigation antenna assembly.

   Refer to INSPECTION [09/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NAVIGATION ECU. Refer to  REMOVAL [10/2020 - ] 

Result: 

NG 

REPLACE NAVIGATION ANTENNA ASSEMBLY. Refer to  REMOVAL [10/2020 - ]