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 assembly which is connected to the radio and display receiver assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

   
   

   1. Clear the DTCs Click here.

   2. Check for DTCs Click here.

      OK
      No DTCs are not output.

   
   

   NG

   CHECK OPTIONAL COMPONENTS Click here

   OK

   USE SIMULATION METHOD TO CHECK Click here

2. CHECK OPTIONAL COMPONENTS

   
   

   1. Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

      OK
      Optional components are installed.

      Note

      Do not remove optional components without permission of the customer.

   
   

   NG

   INSPECT WINDSHIELD GLASS (WINDOW GLASS ANTENNA WIRE) Click here

   OK

   REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

3. INSPECT WINDSHIELD GLASS (WINDOW GLASS ANTENNA WIRE)

   
   

   1. Inspect the windshield glass (window glass antenna wire) Click here.

   
   

   NG

   REPAIR WINDSHIELD GLASS Click here

   OK

4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

   
   

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

   2. Turn the ignition switch to ACC with the radio and display assembly connector connected.

   3. Turn on the radio and turn into AM mode.

   4. Place a screwdriver, thin wire or other metal object on the radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.

      OK
      Noise occurs.

   
   

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   OK

5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 2 ANTENNA CORD SUB-ASSEMBLY)

   
   

   1. Disconnect the DB radio and display receiver assembly connector.

   2. Disconnect 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 1 - 1 Always Below 1 Ω 1-a - 1-a Always Below 1 Ω 1 - Body ground Always 10 kΩ or higher 1-a - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Radio and Display Receiver Assembly)
      *b	Front view of wire harness connector (to Digital Audio Broadcasting Antenna Assembly)

      Disconnect the antenna connector from the radio and display assembly.

   2. Disconnect the antenna connector from the digital audio broadcasting antenna assembly LH.

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

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

   
   

   NG

   REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here

   OK

7. CHECK DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY LH

   
   

   1. Replace the digital audio broadcasting antenna assembly LH with a known good one Click here.

   2. Clear the DTCs Click here.

   3. Check for DTCs Click here.

      OK
      No DTCs are not output.

      Note

      Perform the above inspection on both LH and RH sides.

   
   

   NG

   CHECK DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY RH Click here

   OK

   END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY LH IS DEFECTIVE)

8. CHECK DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY RH

   
   

   1. Replace the digital audio broadcasting antenna assembly RH with a known good one Click here.

   2. Clear the DTCs Click here.

   3. Check for DTCs Click here

   
   

   NG

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   OK

   END (DIGITAL AUDIO BROADCASTING ANTENNA ASSEMBLY RH IS DEFECTIVE)