DTC B15C0: GPS Antenna Connection Malfunction(short); DTC B15C1: GPS Antenna Connection Malfunction(break) [09/2020 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Manual (SOS) Switch	A
   w/o Manual (SOS) Switch	B

Result: 

B 

See step  5

Result: 

A 

See step  2

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 [09/2020 - 01/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

Result: 

NG 

See step  3

1. Remove the No. 6 antenna cord sub-assembly.

   Refer to REMOVAL [09/2020 - ]

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. 6 Antenna Cord Sub-assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (No. 6 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
   A-3a or B-1a - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 6 ANTENNA CORD SUB-ASSEMBLY. Refer to  REMOVAL [09/2020 - ] 

Result: 

OK 

See step  4

1. Remove the navigation antenna assembly.

   Refer to REMOVAL [09/2020 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Navigation Antenna Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 3a	Always	50 to 500 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NAVIGATION ECU. Refer to  REMOVAL [11/2017 - ] 

Result: 

NG 

REPLACE NAVIGATION ANTENNA ASSEMBLY. Refer to  REMOVAL [09/2020 - ] 

1. Replace the navigation antenna assembly.

   Refer to REMOVAL [09/2020 - ]

2. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

3. 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 

END 

Result: 

NG 

REPLACE NAVIGATION ECU. Refer to  REMOVAL [11/2017 - ]