INSPECTION PROCEDURE 19: Preset Station are Erased.: Diagnosis

Required Special Tool: 

• MB991223: Harness set

1. STEP 1. Check at radio and CD player connector C-102 by backprobing in order to check the power supply circuit to the radio and CD player (through the battery). 
   1. Do not disconnect radio and CD player connector C-102.
      Fig 1: Identifying Ground Cable

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   2. Measure the voltage between terminal number 11 and ground by backprobing.
      • The measured value should be approximately 12 volts (battery positive voltage).

   Q: Does the measured voltage correspond with this range? 

   1. YES  : Either repair or replace the radio and CD player. Check that a memory is retained.
   2. NO  : Go to Step 2.
   Fig 2: Identifying Radio And CD Player Connector C-102

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2. STEP 2. Check radio and CD player connector C-102 for damage. 

   Q: Is radio and CD player connector C-102 in good condition? 

   1. YES  : Go to Step 5.
   2. NO  : Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . Check that a memory is retained.
   Fig 3: Measuring Voltage Between Terminal Number 11 And Ground

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3. STEP 5. Check the wiring harness between radio and CD player connector C-102 (terminal 11) and battery. 
   Fig 4: Identifying Connector Terminals C-02, C-102 And C-116

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   NOTE: Also check joint connector C-02 and intermediate connector C-116. If joint connector C-02 or intermediate connectors C-116 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

   Q: Are the wiring harness between radio and CD player connector C-22 (terminal 11) and battery in good condition? 

   1. YES  : Repair or replace the radio and CD player. Check that a memory is retained.
   2. NO  : Repair the wiring harness. Check that a memory is retained.