Mitsubishi 380. Manual — part 938
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-286
INSPECTION PROCEDURE 2: The multi-centre display does not Show any Information.
.
CIRCUIT OPERATION
The multi-centre display unit is energized by the bat-
tery through the ignition switch (ACC) and (IG1).
.
TECHNICAL DESCRIPTION (COMMENT)
The ground circuit, the battery circuit, the ignition
switch (ACC) circuit or the ignition switch (IG1) circuit
is suspected to be open or defective.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Malfunction of the multi-centre display unit
• Damaged wiring harness and connectors
.
52DB014A
CONNECTOR: C-29
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-287
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the multi-centre display unit ground
circuit. Measure the resistance at the multi-centre display
unit connector C-05.
(1) Disconnect the multi-centre display unit connector C-05
and measure at the harness side.
(2) Measure the resistance between terminal 6 and ground.
• The measured value should be 2 ohm or less.
Q: Does the measured resistance value correspond with
this range?
YES : Go to Step 4.
NO : Go to Step 2.
STEP 2. Check the multi-centre display unit connector
C-05 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is the multi-centre display unit connector C-05 in good
condition?
YES : Go to Step 3.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
AC209364
CONNECTOR C-05
(HARNESS SIDE)
JU
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-288
STEP 3. Check the wiring harness between multi-centre
display unit connector C-05 (terminal 6) and ground.
Q: Is the wiring harness between multi-centre display unit
connector C-05 (terminal 6) and ground in good
condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The multi-centre display
unit should work normally.
STEP 4. Check the multi-centre display unit power supply
circuit (battery). Measure the voltage at the multi-centre
display unit connector C-05.
(1) Disconnect the multi-centre display unit connector C-05
and measure at the harness side.
(2) Measure the voltage between terminal 1 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Does the measured voltage correspond with this range?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check multi-centre display unit connector C-05
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is multi-centre display unit connector C-05 in good
condition?
YES : Go to Step 6.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
. The
multi-centre display unit should work normally.
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
AC209365
CONNECTOR C-05
(HARNESS SIDE)
HY
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-289
STEP 6. Check the wiring harness between C-05 (terminal
1) and battery.
NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace the wiring harness. Refer to GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between C-05 and battery in good
condition?
YES : There is no action to be taken.
NO : Repair the wiring harness. The multi-centre display
unit should work normally.
STEP 7. Check the multi-centre display unit power supply
circuit [ignition switch (ACC)]. Measure the voltage at the
multi-centre display unit connector C-05.
(1) Disconnect the multi-centre display unit connector C-05
and measure at the harness side.
(2) Turn the ignition switch to "ACC" position.
(3) Measure the voltage between terminal 3 and ground by
backprobing.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Does the measured voltage correspond with this range?
YES : Go to Step 10.
NO : Go to Step 8.
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
52DB014A
CONNECTOR: C-29
16DB490A
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
AC209365
CONNECTOR C-05
(HARNESS SIDE)
HZ
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