DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected [11/2017 - 09/2020]: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG) and wait for 10 seconds.
4. Turn the Techstream on.
5. Clear the DTCs.

   Body Electrical > Telematics > Clear DTCs 

6. Recheck for DTCs.

   Body Electrical > Telematics > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1573 or B15CB is output	A
   DTC B1573 or B15CB is not output	B

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 09/2020] 

Result: 

A 

See step  2

1. Disconnect the telephone and GPS antenna assembly (for Roof Side) connector from the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Telephone and GPS Antenna Assembly (for Roof Side))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 - 4a	Always	4 to 11 kΩ

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side). Refer to  REMOVAL [09/2014 - ] 

Result: 

OK 

See step  3

1. Disconnect the telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector from the telephone and GPS antenna cord (No. 2 antenna cord sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Telephone and GPS antenna cord (No. 3 Antenna Cord Sub-assembly)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-4 - B-6	Always	Below 1 Ω
   A-4 - Body ground	Always	10 kΩ or higher
   B-6 - Body ground	Always	10 kΩ or higher
   A-4a - B-6a	Always	Below 1 Ω
   A-4a - Body ground	Always	10 kΩ or higher
   B-6a - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [09/2014 - 09/2020] 

Result: 

OK 

See step  4

1. Disconnect the telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector from the telephone and GPS antenna cord (instrument panel wire).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Telephone and GPS antenna cord (No. 2 Antenna Cord Sub-assembly)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B-6 - O137-3	Always	Below 1 Ω
   B-6 - Body ground	Always	10 kΩ or higher
   O137-3 - Body ground	Always	10 kΩ or higher
   B-6a - O137-3a	Always	Below 1 Ω
   B-6a - Body ground	Always	10 kΩ or higher
   O137-3a - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [09/2014 - ] 

Result: 

OK 

See step  5

1. Disconnect the telephone and GPS antenna cord (instrument panel wire) connector from the DCM (Telematics Transceiver).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Telephone and GPS antenna cord (Instrument Panel Wire)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O137-3 - O138-1 (TEL)	Always	Below 1 Ω
   O137-3 - Body ground	Always	10 kΩ or higher
   O138-1 (TEL) - Body ground	Always	10 kΩ or higher
   O137-3a - O138-1a	Always	Below 1 Ω
   O137-3a - Body ground	Always	10 kΩ or higher
   O138-1a - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEPHONE AND GPS ANTENNA CORD (INSTRUMENT PANEL WIRE) 

Result: 

OK 

See step  6

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

   Refer to REMOVAL [09/2014 - ]

   OK

   The system returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  7

1. Replace the DCM (Telematics Transceiver).

   Refer to REMOVAL [11/2017 - 09/2020]

   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [11/2017 - 09/2020]