DTC B1537-11: Telephone Sub Antenna Circuit Short to Ground; DTC B153713: Telephone Sub Antenna Circuit Open [07/2022 - ]: Procedure

1. Turn the ignition switch to ON and wait for 10 seconds or more.
2. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

3. Check for DTCs and check that no DTCs are output.

   Body Electrical > Telematics > 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 [10/2018 - ] 

Result: 

NG 

See step  2

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

   Refer to REMOVAL [07/2022 - ]

2. Inspect telephone and GPS antenna assembly.

   Refer to INSPECTION [10/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Front Side). Refer to  REMOVAL [07/2022 - ] 

Result: 

OK 

See step  3

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (to Telephone and GPS Antenna Assembly (for Front Side))

2. Disconnect the antenna connector from the DCM (telematics transceiver).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (to DCM (Telematics Transceiver))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D-4 - A-1	Always	Below 1 Ω
   D-4a - A-1a	Always	Below 1 Ω
   D-4 or A-1 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [07/2022 - ] 

Result: 

OK 

See step  4

1. Replace the DCM (telematics transceiver) with a new one.

   Refer to REMOVAL [07/2022 - ]

   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 [07/2022 - ]