Mitsubishi Evolution X. Manual — part 1013

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-413

STEP 7. Check the wiring harness between ETACS-ECU
connector C-317 (terminal 1) and multivision display
connector C-13 (terminal 17) or multivision display
connector C-12 (terminal 21).

• Check the power supply lines (battery supply) for open cir-

cuit and short circuit.

NOTE: Also check intermediate connector C-108, C-106 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-108, C-106
is damaged, repair or replace the connector as described in
GROUP 00E, Harness Connector Inspection

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector

C-317 (terminal 1) and multivision display connector
C-13 (terminal 17) or multivision display connector C-12
(terminal 21) in good condition?
YES : Go to Step 8.
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 8. Using scan tool MB991958, check data list.
Check the input signal of ACC relay.

• Turn the ignition switch to the ACC position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : Go to Step 9.
NO : Refer to GROUP 54A, ETACS, Diagnosis

− Inspection

Procedure 1 "The ignition switch (ACC) signal is not
received

P.54A-640

."

STEP 9. Check ETACS-ECU connector C-315 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-315 in good condition?

YES : Go to Step 10.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Item No.

Item name

Normal
conditions

Item 288

ACC switch

ON

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-414

STEP 10. Check the power supply circuit to the multivision
display. Measure the voltage at multivision display
connector C-13.
(1) Disconnect the connector, and measure at the wiring

harness-side connector.

(2) Measure the voltage between multivision display connector

C-13 terminal 14 and ground.

OK: Battery voltage

Q: Is the measured voltage battery voltage?

YES : Go to Step 12.
NO : Go to Step 11.

STEP 11. Check the wiring harness between multivision
display connector C-13 (terminal 14) and ETACS-ECU
connector C-315 (terminal 9).

• Check the power supply line for open circuit and short cir-

cuit.

NOTE: Also check intermediate connector C-108 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-108 is damaged, repair
or replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

Q: Is the wiring harness between multivision display

connector C-13 (terminal 14) and ETACS-ECU connector
C-315 (terminal 9) in good condition?
YES : Go to Step 12.
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 12. Retest the system
Check if the multivision display power is turned ON.
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

P.00-15

).

NO : Replace the multivision display.

AC709325 AM

Harness side: C-13

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-415

Inspection Procedure 2: No sound is heard. <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.)

Multivision Display System Circuit

RELAY
BOX

AUDIO AMPLIFIER

FUSIBLE
LINK

36

MULTIVISION DISPLAY

MMCS

TSB Revision

CHASSIS ELECTRICAL

54A-416

.

COMMENTS ON TROUBLE SYMPTOM

If the audio sound is not output, the multivision dis-
play, audio amplifier, or power supply circuit of audio
amplifier may have a problem, or the option coding
information may be inconsistent.

.

PROBABLE CAUSES

• The multivision display may be defective

• The audio amplifier may be defective

• Option coding information inconsistency

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

AC708951BN

C-09

C-24

Connectors: C-09, C-13, C-24, C-110

C-13 (GR)

C-110

AC708950

Connector: C-47

AE

AC708955AF

Connector: D-25

D-25 (B)

AC708954 AR

Connectors: D-29, D-30

D-30

D-29