Inspection Procedure 1: A satellite radio cannot be received: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check whether AM or FM broadcast frequency is received  .

   Check whether AM or FM broadcast frequency is received.

   Q: Is AM or FM broadcast frequency received? 

   • YES:  Go to Step 2.
   • NO:  Diagnose the radio and CD player < vehicles with radio and CD player > or the multivision display < vehicles with MMCS > (Refer to TROUBLE SYMPTOM CHART < vehicles with radio and CD player > or TROUBLE SYMPTOM CHART < vehicles with MMCS >).
2. STEP 2. Check satellite radio tuner connector C-150 and radio and CD player connector C-106 < vehicles with radio and CD player > or multivision display connector C-107 < vehicles with MMCS > for loose, corroded or damaged terminals, or terminals pushed back in the connector  .

   Q: Is satellite radio tuner connector C-150 or radio and CD player connector C-106 < vehicles with radio and CD player > or multivision display connector C-107 < vehicles with MMCS > in good condition? 

   • YES:  Go to Step 3.
   • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
3. STEP 3. Check the wiring harness between satellite radio tuner connector C-150 (terminal 13, 14) and radio and CD player connector C-106 < vehicles with radio and CD player > or multivision display connector C-107 < vehicles with MMCS > (terminal 15, 6)  .
   • Check the communication lines for open circuit and short circuit.

   Q: Is the wiring harness between satellite radio tuner connector C-150 (terminal 13, 14) and radio and CD player connector C-106 < vehicles with radio and CD player > or multivision display connector C-107 < vehicles with MMCS > (terminal 15, 6) in good condition? 

   • YES:  Go to Step 4.
   • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
4. STEP 4. Substitute a known good radio and CD player < vehicles with radio and CD player > or multivision display < vehicles with MMCS >, and check the trouble symptom  .

   Check whether satellite radio broadcast can be received.

   Q: Can a satellite radio be received? 

   • YES:  Replace the radio and CD player < vehicles with radio and CD player > or multivision display < vehicles with MMCS >.
   • NO:  Replace the satellite radio tuner.