DTC B1573: Short in Telephone Antenna Circuit; DTC B15CB: Telematics Transceiver Antenna Disconnected: 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. Perform "HEALTH CHECK" and check for current DTCs. Refer to HEALTH CHECK .

   Result

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

B → See step   7 

A: Go to next step 

1. Disconnect the telephone and GPS antenna assembly connector from the telephone and GPS antenna cord (antenna cord sub-assembly).
   Fig 1: Inspecting Telephone And GPS Antenna Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 1a	Always	4 to 11 kΩ

   TEXT IN ILLUSTRATION
   
   

   *1	Telephone and GPS Antenna Assembly

NG → See step   5 

OK: Go to next step 

1. Disconnect the telephone and GPS antenna cord (antenna cord sub-assembly) connector from the instrument panel wire (antenna cord sub-assembly).
   Fig 2: Inspecting Telephone And GPS Antenna Cords (Antenna Cord Sub-Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-1 - B-2	Always	Below 1 Ω
   A-1a - B-2a	Always	Below 1 Ω
   A-1 - Body ground	Always	10 kΩ or higher
   A-1a - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly)

NG → See step   9 

OK: Go to next step 

1. Disconnect the instrument panel wire (antenna cord sub-assembly) connector from the DCM (Telematics Transceiver).
   Fig 3: Inspecting Telephone And GPS Antenna Cords (Instrument Panel Wire)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C-1 - D-2	Always	Below 1 Ω
   C-1a - D-2a	Always	Below 1 Ω
   C-1 - Body ground	Always	10 kΩ or higher
   C-1a - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Instrument Panel Wire (Antenna Cord Sub-assembly)

NG → REPLACE INSTRUMENT PANEL WIRE (ANTENNA CORD SUB-ASSEMBLY) 

OK: Go to next step 

1. Replace the telephone and GPS antenna assembly with a normal one and check if the same problem occurs again. Refer to REMOVAL .

   OK

   The system returns to normal.

NG → See step   6 

OK → END 

1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL .
   NOTE:

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

NEXT → See step   8