Mitsubishi Evolution X. Manual — part 1015
MMCS
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CHASSIS ELECTRICAL
54A-421
STEP 12. Check the wiring harness between audio
amplifier connector D-25 (terminal 25, 35, 36) and fusible
link (36).
NOTE: Also check intermediate connector C-47 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-47 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
• Check the power supply line for open circuit and short cir-
cuit.
Q: Is the wiring harness between audio amplifier connector
D-29 (terminal 25, 35, 36) and fusible link (36) in good
condition?
YES : Go to Step 13.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 13. Check the ground circuit to the audio amplifier.
Measure the resistance at audio amplifier connector D-29.
(1) Disconnect audio amplifier connector D-29, and measure
the resistance available at the wiring harness side of the
connector.
(2) Measure the resistance between terminal 24 and ground.
OK: The resistance should be 2 ohms or less
(3) Measure the resistance between terminal 31 and ground.
OK: The resistance should be 2 ohms or less
AC709322 AT
Harness side: D-29
AC709322 AU
Harness side: D-29
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CHASSIS ELECTRICAL
54A-422
(4) Measure the resistance between terminal 32 and ground.
OK: The resistance should be 2 ohms or less
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 15.
NO : Go to Step 14.
STEP 14. Check the wiring harness between audio
amplifier connector D-29 (terminal 24, 31, 32) and ground.
• Check the ground wires for open circuit.
Q: Is the wiring harness between audio amplifier connector
D-25 (terminal 24, 31, 32) and ground in good condition?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 15. Check multivision display connector C-09, C-13
and audio amplifier connector D-30 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is multivision display connector C-09, C-13 and audio
amplifier connector D-30 in good condition?
YES : Go to Step 16.
NO : Repair or replace the damaged component (Refer to
GROUP 00E, Harness Connector Inspection
STEP 16. Check the wiring harness between multivision
display connector C-09 (terminal 72) and audio amplifier
connector D-30 (terminal 3)
NOTE: Also check intermediate connectors C-110 and C-24 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-110 or C-24
is damaged, repair or replace the connector as described in
GROUP 00E, Harness Connector Inspection
• Check the communication lines for open circuit and short
circuit.
AC709322 AV
Harness side: D-29
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Q: Is the wiring harness between multivision display
connector C-09 (terminal 72) and audio amplifier
connector D-30 (terminal 3) in good condition?
YES : Go to Step 17.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 17. Check the wiring harness between multivision
display connector C-13 (terminal 6) and audio amplifier
connector D-29 (terminal 34)
NOTE: Also check intermediate connectors C-110 and C-24 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-110 or C-24
is damaged, repair or replace the connector as described in
GROUP 00E, Harness Connector Inspection
• Check the communication lines for open circuit and short
circuit.
Q: Is the wiring harness between multivision display
connector C-13 (terminal 6) and audio amplifier
connector D-29 (terminal 34) in good condition?
YES : Go to Step 18.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 18. Retest the system
Check that the audio sound is output.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
NO : Go to Step 19.
STEP 19. Retest the system
Temporarily replace the multivision display, and check if the
sound is output.
Q: Is the check result normal?
YES : Replace the multivision display.
NO : Replace the audio amplifier.
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CHASSIS ELECTRICAL
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Inspection Procedure 3: No sound is heard from one of the speakers. <Vehicles with audio amplifier>
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the ground circuit, and the communi-
cation circuit are normal. (Check that the voltage is 10 V or more.)
Speaker System Circuit
AUDIO AMPLIFIER
TWEETER
(LH)
TWEETER
(RH)
FRONT DOOR
SPEAKER (LH)
FRONT DOOR
SPEAKER (RH)
REAR DOOR
SPEAKER
(LH)
REAR DOOR
SPEAKER
(RH)
SUB WOOFER
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