INSPECTION PROCEDURE 22: Preset Stations are Erased.: Diagnosis

Required Special Tool: 

• MB991223: Harness set

1. STEP 1. Measure at radio and CD player or radio, CD player and CD changer connector C-105 in order to check the power supply circuit to the radio and CD player (through the battery). 
   1. Disconnect radio and CD player or radio, CD player and CD changer connector C-105, and measure at the wiring harness side.
      Fig 1: Identifying CD Player And CD Changer Connector C-105

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Measure the voltage between terminal number 21 and ground.
      • The voltage should measure approximately 12 volts (battery positive voltage).
        Fig 2: Measuring Voltage Between Terminal Number 21 And Ground

        Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the measured voltage approximately 12 volts (battery positive voltage)? 

   1. YES  : Either repair or replace the radio and CD player or radio, CD player and CD changer. Check that a memory is retained.
   2. NO  : Go to Step 2.
2. STEP 2. Check radio and CD player or radio, CD player and CD changer connector C-105 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 3: Identifying CD Player And CD Changer Connector C-105

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is radio and CD player or radio, CD player and CD changer connector C-105 in good condition? 

   1. YES  : Go to Step 3.
   2. NO  : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Check that a memory is retained.
3. STEP 3. Check the wiring harness between radio and CD player or radio, CD player and CD changer connector C-105 (terminal 21) and the battery. 
   Fig 4: Identifying CD Player And CD Changer Connector C-105 (Terminal 21)

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check intermediate connector C-31 and joint connector(1) C-04 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-31 or joint connector (1) C-04 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
   Fig 5: Identifying Intermediate Connector C-31 And Joint Connector(1) C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the wiring harness between radio and CD player or radio, CD player and CD changer connector C-105 (terminal 21) and the battery in good condition? 

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