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. 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 and B15CB is not output	B

B → See step   8 

A: Go to next step 

1. Disconnect the telephone and GPS antenna connector.
   Fig 1: Identifying Telephone And GPS Antenna Connector

   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
   3 - 3a	Always	4 to 11 kΩ

   TEXT IN ILLUSTRATION
   
   

   *a	Telephone and GPS Antenna

NG → See step   9 

OK: Go to next step 

1. Disconnect the No. 3 antenna cord sub-assembly from telephone and GPS antenna connector.
   Fig 2: No. 3 Antenna Cord Sub-Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the No. 3 antenna cord sub-assembly from No. 2 antenna cord sub-assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

   *a	No. 3 Antenna Cord Sub-assembly

NG → See step   11 

OK: Go to next step 

1. Disconnect the No. 2 antenna cord sub-assembly from No. 3 antenna cord sub-assembly.
   Fig 3: Identifying No. 2 Antenna Cord Sub-Assembly Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the No. 2 antenna cord sub-assembly from antenna cord sub-assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C-3 - D-1	Always	Below 1 Ω
   C-3a - D-1a	Always	Below 1 Ω
   C-3 - Body ground	Always	10 kΩ or higher
   C-3a - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	No. 2 Antenna Cord Sub-assembly

NG → See step   12 

OK: Go to next step 

1. Disconnect the antenna cord sub-assembly from No. 2 antenna cord sub-assembly.
   Fig 4: Identifying Antenna Cord Sub-Assembly Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the antenna cord sub-assembly from DCM (telematics transceiver).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E-1 - F-1	Always	Below 1 Ω
   F-1a - F-1a	Always	Below 1 Ω
   E-1 - Body ground	Always	10 kΩ or higher
   F-1a - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Antenna Cord Sub-assembly

NG → REPLACE ANTENNA CORD SUB-ASSEMBLY 

OK: Go to next step 

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

   OK

   The system returns to normal.

NG → See step   7 

OK → END 

1. Replace the DCM (telematics transceiver). Refer to REMOVAL .
   NOTE:

   • The engine switch must be off.
   • Do not replace the DCM (telematics transceiver) with one from another vehicle.

NEXT → See step   10