Inspection Procedure 5: DIAGNOSIS MODE cannot be made an entry. < Vehicles with radio and CD player >: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Check the radio and CD player operation. 

   Check if the radio and CD player work normally and the sound is output.

   Q: Is the check result normal? 

   • YES:  Go to Step 2.
   • NO:  Troubleshoot the radio and CD player. (Refer to TROUBLE SYMPTOM CHART .)
2. STEP 2. Check hands free module connector C-110 and radio and CD player connector C-106 for loose, corroded or damaged terminals, or terminals pushed back in the connector 

   Q: Are hands free module connector C-110 and radio and CD player connector C-106 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 hands free module connector C-110 (terminal 2, 16) and radio and CD player connector C-106 (terminal 1, 10). 
   • Check the signal lines for open circuit and short circuit.
   NOTE: Also check joint connector C-62 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector C-62 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between hands free module connector C-110 (terminal 2, 16) and radio and CD player connector C-106 (terminal 1, 10) 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. Check if the power supply circuit of hands free module have a problem. 

   Perform the inspection Procedure 1 "Check the hands free module power supply circuit". of the troubleshooting. (Refer to INSPECTION PROCEDURE 1: CHECK THE HANDS FREE MODULE POWER SUPPLY CIRCUIT. .)

   Q: Is the check result normal? 

   • YES:  Go to step 5.
   • NO:  Repair according to the troubleshooting for reference.
5. STEP 5. Replace the hands free module temporarily, and check the trouble symptom. 

   Q: Is the check result normal? 

   • YES:  Replace the hands free module.
   • NO:  Replace the radio and CD player.