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Home >> Mitsubishi >> 2005 >> Endeavor LS, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Chassis Electrical >> Radio With Tape Player And Cd Player >> Symptom Procedures >> INSPECTION PROCEDURE 5: No Sound. < Vehicles with Audio Amplifier > >> Diagnosis

INSPECTION PROCEDURE 5: No Sound. < Vehicles with Audio Amplifier >: Diagnosis

Required Special Tool: 

  1. STEP 1. Measure the voltage at audio amplifier connector C-11 in order to check the battery circuit of power supply system to the audio amplifier. 
    1. Disconnect audio amplifier connector C-11, and measure at the wiring harness side.
      Fig 1: Identifying Audio Amplifier Connector C-11
      G02367650Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Measure the voltage between terminal 6 and ground.
      • The voltage should measure approximately 12 volts (battery positive voltage).
    3. Measure the voltage between terminal 16 and ground.
      • The voltage should measure approximately 12 volts (battery positive voltage).
        Fig 2: Measuring Voltage Between Terminal 16 And Ground
        G02367651Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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

    1. YES  : Go to  Step 4.
    2. NO  : Go to Step 2.
  2. STEP 2. Check audio amplifier connector C-11 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 3: Identifying Audio Amplifier Connector C-11
    G02367652Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is audio amplifier connector C-11 in good condition? 

    1. YES  : Go to Step 3.
    2. NO  : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The speakers should sound.
  3. STEP 3. Check the wiring harness between audio amplifier connector C-11 (terminal 6 and 16) and the battery. 
    Fig 4: Identifying Audio Amplifier Connector C-11 (Terminal 6 And 16) And Battery
    G02367653Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    NOTE: Also check intermediate connector C-31 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-31 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    Fig 5: Identifying Intermediate Connector C-31
    G02367654Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the wiring harness between audio amplifier connector C-11 (terminal 6 and 16) and the battery in good condition? 

    1. YES  : There is no action to be taken.
    2. NO  : Repair the wiring harness. The speakers should sound.
  4. STEP 4. Measure the resistance at audio amplifier connector C-11 in order to check the ground circuit to the audio amplifier. 
    1. Disconnect audio amplifier connector C-11, and measure at the wiring harness side.
      Fig 6: Identifying Audio Amplifier Connector C-11
      G02367655Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Measure the resistance between terminal 7 and ground.
      • The resistance should be 2 ohms or less.
    3. Measure the resistance between terminal 17 and ground.
      • The resistance should be 2 ohms or less.
        Fig 7: Measuring Resistance Between Terminal 17 And Ground
        G02367656Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the measured resistance 2 ohms or less? 

    1. YES  : Go to  Step 7.
    2. NO  : Go to Step 5.
  5. STEP 5. Check audio amplifier connector C-11 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 8: Identifying Audio Amplifier Connector C-11
    G02367657Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is audio amplifier connector C-11 in good condition? 

    1. YES  : Go to Step 6.
    2. NO  : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The speakers should sound.
  6. STEP 6. Check the wiring harness between audio amplifier connector C-11 (terminal 7 and 17) and ground. 
    Fig 9: Identifying Audio Amplifier Connector C-11 (Terminal 7 And 17)
    G02367658Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the wiring harness between audio amplifier connector C-11 (terminal 7 and 17) and ground in good condition? 

    1. YES  : There is no action to be taken.
    2. NO  : Repair the wiring harness. The speakers should sound.
  7. STEP 7. Check radio, CD player and CD changer connector C-113 and audio amplifier connector C-12 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 10: Identifying CD Player And CD Changer Connector C-113 And Audio Amplifier Connector C-12
    G02367659Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are radio, CD player and CD changer connector C-113 and audio amplifier connector C-12 in good condition? 

    1. YES  : Go to Step 8.
    2. NO  : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The door speaker (LH) should sound.
  8. STEP 8. Check the wiring harness between CD player and CD changer connector C-113 (terminals 31, 32, 33, 34, 40 and 41) and audio amplifier connector G-19 (terminals 22, 23, 24, 30 and 31). 
    Fig 11: Identifying CD Player And CD Changer Connector c112, C-113
    G02367660Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Do the speakers sound normally? 

    1. YES  : The procedure is complete.
    2. NO  : Repair or replace the audio amplifier.
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