AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B157D

DESCRIPTION

This DTC is stored when a malfunction occurs in the digital audio broadcasting antenna cable which is connected to the radio and display receiver assembly.

WIRING DIAGRAM

PROCEDURE

1. CHECK CONNECTION OF DAB RADIO ANTENNA CABLE

   
   

   1. Check if the DAB radio antenna cable is securely connected to the radio and display receiver assembly.

      OK
      DAB radio antenna cable is securely connected

      Result
      Proceed to OK NG

   
   

   NG

   SECURELY CONNECT DAB RADIO ANTENNA CABLE

   OK

2. CHECK ANTENNA CORD SUB-ASSEMBLY

   
   
   1. 

      *a	Front view of wire harness connector (to Radio and Display Receiver Assembly)
      *b	Front view of wire harness connector (to No. 2 Antenna Cord Sub-assembly)

      Remove the antenna connector from the radio and display receiver assembly.

   2. Remove the antenna connector from the 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 DB-1 - 1 Always Below 1 Ω DB-1a - 1a Always Below 1 Ω DB-1 - Body ground Always 10 kΩ or higher DB-1a - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE ANTENNA CORD SUB-ASSEMBLY Click here

   OK

3. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

   
   
   1. 

      *a	Front view of wire harness connector (to Antenna Cord Sub-assembly)
      *b	Front view of wire harness connector (to No. 3 Antenna Cord Sub-assembly)

      Remove the antenna connector from the antenna cord sub-assembly.

   2. Remove the antenna connector from the No. 3 antenna cord sub-assembly.

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

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

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

   OK

4. CHECK NO. 3 ANTENNA CORD SUB-ASSEMBLY

   
   
   1. 

      *a	Front view of wire harness connector (to No. 2 Antenna Cord Sub-assembly)
      *b	Front view of wire harness connector (to Antenna with Holder Assembly)

      Remove the antenna connector from the No. 2 antenna cord sub-assembly.

   2. Remove the antenna connector from the antenna with holder assembly.

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

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

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 3 ANTENNA CORD SUB-ASSEMBLY Click here

   OK

5. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY

   
   

   1. Check that the roof antenna pole sub-assembly is securely installed.

      Click here

      OK
      The roof antenna pole sub-assembly is installed properly

      Result
      Proceed to OK NG

   
   

   NG

   REINSTALL ROOF ANTENNA POLE SUB-ASSEMBLY Click here

   OK

6. CHECK ROOF ANTENNA POLE SUB-ASSEMBLY

   
   

   1. Replace the roof antenna pole sub-assembly with a known good one.

      Click here

   2. Clear the DTCs.

      Click here

      
      Body Electrical > Navigation System > Clear DTCs

   3. Check for DTCs.

      Click here

      
      Body Electrical > Navigation System > Trouble Codes

      OK
      No DTCs are output.

      Result
      Proceed to OK NG

   
   

   OK

   END (ROOF ANTENNA POLE SUB-ASSEMBLY IS DEFECTIVE)

   NG

7. CHECK ANTENNA WITH AMPLIFIER ASSEMBLY

   
   

   1. Replace the antenna with holder assembly with a known good one.

      Click here

   2. Clear the DTCs.

      Click here

      
      Body Electrical > Navigation System > Clear DTCs

   3. Check for DTCs.

      Click here

      
      Body Electrical > Navigation System > Trouble Codes

      OK
      No DTCs are output.

      Result
      Proceed to OK NG

   
   

   OK

   END (ANTENNA WITH HOLDER ASSEMBLY IS DEFECTIVE)

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here