[Previous][Next]
Inspection Procedure 2: No sound is heard. <Vehicles with audio amplifier (Up to 20 Model year)>
 
 
cautionBefore replacing the multivision display, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the audio sound is not output, the multivision display may have a problem. In addition, if any of the speakers, tweeters or subwoofer is short-circuited, the protection circuit inside the multivision display disables all the speakers, tweeters or subwoofer to sound. Therefore, if all the speakers do not output sound, the speaker, tweeter or subwoofer circuit may be shorted or the speaker, tweeter, subwoofer or audio amplifier may be defective.
 
 
TROUBLESHOOTING HINTS
  • The multivision display may be defective
  • The audio amplifier may be defective
  • The speaker, tweeter or subwoofer may be defective
  • The emergency call relay box may be defective <Vehicles with MITSUBISHI CONNECT Safeguard Services and Remote Services>
  • Damaged harness wires and connectors
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Checking with audio speaker test.
Perform the audio speaker test, and check which speaker, tweeter or subwoofer does not output the sound.
Is the check result normal?
: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
: Go to Step 2.
: Go to Step 7.
 
STEP 2. Check the speaker, tweeter or subwoofer.
(1) Remove the speaker, tweeter or subwoofer.
(2) Check that the speaker, tweeter or subwoofer outputs the noise when the voltage of 5 volts is applied to the speaker, tweeter or subwoofer connector terminal.
Is the check result normal?
: Go to Step 5.
: Go to Step 3.
Replace the speaker, tweeter or subwoofer.
 
STEP 3. Check the wiring harness between the emergency call relay box connector terminal and the audio amplifier connector terminal.
Check of short circuit in DSI+, DSI- line emergency call relay box connector and audio amplifier connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 5.
 
STEP 4. Check the wiring harness between the front door speaker (RH) connector terminal and the emergency call relay box connector terminal.
Check of short circuit in DSO+, DSO- line front door speaker (RH) connector and emergency call relay box connector.
Is the check result normal?
Replace the emergency call relay box . Then go to Step 5.
Repair the connector(s) or wiring harness. Then go to Step 5.
 
STEP 5. Check the wire harness between the speaker, tweeter or subwoofer connector terminal and the audio amplifier connector terminal.
Front door speaker (LH)
  • Check of short circuit in DFL+, DFL- line between front door speaker (LH) connector and audio amplifier connector.
Front door speaker (RH) <Vehicles without MITSUBISHI CONNECT Safeguard Services and Remote Services>
  • Check of short circuit in DFR+, DFR- line between front door speaker (RH) connector and audio amplifier connector.
Front tweeter (LH)
  • Check of short circuit in TFL+, TFL- line between front door speaker (LH) connector and audio amplifier connector.
Front tweeter (RH)
  • Check of short circuit in TFR+, TFR- line between front door speaker (RH) connector and audio amplifier connector.
Rear door speaker (LH)
  • Check of short circuit in RL+, RL- line between front door speaker (LH) connector and audio amplifier connector.
Rear door speaker (RH)
  • Check of short circuit in RR+, RR- line between front door speaker (RH) connector and audio amplifier connector.
Subwoofer
  • Check of short circuit in RW+, RW1+, RW-, RW1- line between subwoofer connector and audio amplifier connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness. (Replace the harness assembly because the aluminum harness cannot be repaired.)
 
STEP 6. Check of short to power supply, short to ground, and open circuit in FL+, FL-, FR+, FR-, RR+ and RR- lines between audio amplifier connector and multivision display connector.
Is the check result normal?
Go to Step 12.
Repair the connector(s) or wiring harness.
 
STEP 7. Check the speaker, tweeter or subwoofer.
Follow the speaker test to check which speaker, tweeter or subwoofer does not sound.
(1) Remove the speaker, tweeter or subwoofer.
(2) Check that the speaker, tweeter or subwoofer outputs the noise when the voltage of 5 volts is applied to the speaker, tweeter or subwoofer connector terminal.
Do the speaker output the noise?
: Go to Step 10.
: Go to Step 8.
Replace the speaker, tweeter or subwoofer.
 
STEP 8. Check the wiring harness between the emergency call relay box connector terminal and the audio amplifier connector terminal.
Check of short circuit in DSI+, DSI- line emergency call relay box connector and audio amplifier connector.
Is the check result normal?
Go to Step 9.
Repair the connector(s) or wiring harness. Then go to Step 10.
 
STEP 9. Check the wiring harness between the front door speaker (RH) connector terminal and the emergency call relay box connector terminal.
Check of short circuit in DSO+, DSO- line front door speaker (RH) connector and emergency call relay box connector.
Is the check result normal?
Replace the emergency call relay box . Then go to Step 10.
Repair the connector(s) or wiring harness. Then go to Step 10.
 
STEP 10. Check the wire harness between the speaker, tweeter or subwoofer connector terminal and audio amplifier connector terminal.
Follow the speaker test to check which speaker, tweeter or subwoofer circuit is defective.
Front door speaker (LH)
  • Check of short circuit in DFL+, DFL- line between front door speaker (LH) connector and audio amplifier connector.
Front door speaker (RH) <Vehicles without MITSUBISHI CONNECT Safeguard Services and Remote Services>
  • Check of short circuit in DFR+, DFR- line between front door speaker (RH) connector and audio amplifier connector.
Front tweeter (LH)
  • Check of short circuit in TFL+, TFL- line between front door speaker (LH) connector and audio amplifier connector.
Front tweeter (RH)
  • Check of short circuit in TFR+, TFR- line between front door speaker (RH) connector and audio amplifier connector.
Rear door speaker (LH)
  • Check of short circuit in RL+, RL- line between front door speaker (LH) connector and audio amplifier connector.
Rear door speaker (RH)
  • Check of short circuit in RR+, RR- line between front door speaker (RH) connector and audio amplifier connector.
Subwoofer
  • Check of short circuit in RW+, RW1+, RW-, RW1- line between subwoofer connector and audio amplifier connector.
Is the check result normal?
Go to Step 11.
Repair the connector(s) or wiring harness. (Replace the harness assembly because the aluminum harness cannot be repaired.)
 
STEP 11. Check of short to power supply, short to ground, and open circuit in FL+, FL-, FR+, FR-, RR+ and RR- lines between audio amplifier connector and multivision display connector.
Is the check result normal?
Go to Step 12.
Repair the connector(s) or wiring harness.
 
STEP 12. Retest the system.
Replace the audio amplifier, then check that the audio sound is output.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the multivision display (Refer to ).