DTC B1537-11: Telephone Sub Antenna Circuit Short to Ground; DTC B1537-13: Telephone Sub Antenna Circuit Open [10/2022 - ]: Procedure

Pre-procedure1

1. Turn the ignition switch to ON and wait for 10 seconds.

   Procedure1

2. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

   Result

   Proceed to
   NEXT

   Post-procedure1

3. None

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Body Electrical > Telematics > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

Result: 

B 

See step  3

Refer to INSPECTION [10/2020 - ]

Result

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA (for Front Side). Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  4

Pre-procedure1

1. Disconnect the antenna connector from the telephone and GPS antenna (for Front Side).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Telephone and GPS Antenna [for Front Side])
   *b	Front view of wire harness connector (to DCM [Telematics Transceiver])

2. Disconnect the DCM (Telematics Transceiver) connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-4 - B-1 (ANT3)	Always	Below 1 Ω
   A-4a - B-1a	Always	Below 1 Ω
   A-4 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY [I/P]). Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  5

Pre-procedure1

1. Replace the telephone and GPS antenna (for front side) with a known good one and check if the same problem occurs again.

   HINT: 

   Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

   Procedure1

2. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

   Result

   Proceed to
   NEXT

   Post-procedure1

3. None

Result: 

NEXT 

See step  6

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

   Body Electrical > Telematics > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

A 

END (TELEPHONE AND GPS ANTENNA [FOR FRONT SIDE] IS DEFECTIVE) 

Result: 

B 

See step  7

1. Replace the DCM (Telematics Transceiver).

   Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

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