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Inspection Procedure 5: DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not displayed on the MENU screen of audio.
 
 
cautionBefore replacing the hands free module or radio and CD player, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the diagnosis mode cannot be made an entry, the hands free module, the communication between the hands free module and the radio and CD player, or the power supply system of hands free module may have a problem.
 
 
 
TROUBLESHOOTING HINTS
  • The hands free module may be defective.
  • The radio and CD player may be defective.
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check the radio and CD player operation.
Check if the radio and CD player work normally and the sound is output.
Is the check result normal?
Go to Step 2
Troubleshoot the radio and CD player. (Refer to .)
 
STEP 2. Check of short to power supply, short to ground, and open circuit in IE+, IE- line between hands free module connector and radio and CD player connector.
Is the check result normal?
Go to Step 3
Repair the connector(s) or wiring harness.
 
STEP 3. 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 .)
Is the check result normal?
Go to Step 4
Repair according to the troubleshooting for reference.
 
STEP 4. Replace the hands free module temporarily, and check the trouble symptom.
Is the check result normal?
Replace the hands free module.
Replace the radio and CD player.