Inspection Procedure 3: The radio broadcasting can not be received: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check the state of the antenna rod and antenna base  .

   Q: Is the antenna assembled? 

   • YES:  Go to Step 2.
   • NO:  Assemble antenna rod and antenna base.
2. STEP 2. Check to see if inspections are taking place is an area exposed to special electric fields  .

   Q: Is the reception area exposed to special electric fields? 

   • YES:  Go to Step 3.
   • NO:  Go to  Step 4.
3. STEP 3. Move the vehicle and check the radio  .

   Move the vehicle to a good reception area that is not exposed to special electric fields.

   Q: Is the check result normal? 

   • YES:  Diagnosis complete.
   • NO:  Go to Step 4.
4. STEP 4. Check if there is any damage to the antenna rod, antenna base and antenna feeder  .

   Q: Is the check result normal? 

   • YES:  Go to Step 5.
   • NO:  Replace the antenna rod, antenna base and antenna feeder.
5. STEP 5. Check the connection of the antenna feeder's plug and radio and CD player  .

   Q: Is the antenna feeder's plug thoroughly connected to the radio and CD player? 

   • YES:  Go to Step 6.
   • NO:  Thoroughly connect the antenna feeder's plug and the radio and CD player.
6. STEP 6. Check radio and CD player connector C-104 and antenna amplifier connector C-15 for loose, corroded or damaged terminals, or terminals pushed back in the connector 

   Q: Are radio and CD player connector C-104 and antenna amplifier connector C-15 in good condition? 

   • YES:  Go to Step 7
   • NO:  Repair or replace the damaged component(s) (Refer to HARNESS CONNECTOR INSPECTION ).
7. STEP 7. Check the wiring harness between radio and CD player connector C-104 (terminal 34) and antenna amplifier connector C-15 (terminal 1)  .
   • Check the communication line for open circuit and short circuit.

   Q: Is the wiring harness between radio and CD player connector C-104 (terminal 34) and antenna amplifier connector C-15 (terminal 1) in good condition? 

   • YES:  Go to Step 8
   • NO:  Repair the antenna feeder.
8. STEP 8. Substitute a known good radio and CD player, and check the trouble symptom  .

   Q: Is the check result normal? 

   • YES:  Replace the radio and CD player.
   • NO:  Either repair or replace the antenna rod and antenna base.