Mitsubishi Galant (2004+). Manual — part 1506
MULTI-CENTER DISPLAY
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CHASSIS ELECTRICAL
54A-267
.
CIRCUIT OPERATION
The multi-center display unit (middle grade type) is
linked to CAN communication lines to communicate
with the combination meter and the powertrain con-
trol module, both of which have a terminator resistor.
.
TECHNICAL DESCRIPTION (COMMENT)
If the system does not communicate with the scan
tool, power supply to the data link connector or CAN
bus lines may be defective.
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness A (Vehicles with CAN
communication system)
AC305206
CONNECTOR: A-02
AO
A-02 (GR)
AC305216
B-19 (B)
CONNECTOR: B-19
AD
AC305233
C-05 (B)
CP
CONNECTOR: C-05
AC305231
C-02
C-29
C-101
C-125 (B)
DC
CONNECTORS: C-02, C-29, C-101, C-125
MULTI-CENTER DISPLAY
TSB Revision
CHASSIS ELECTRICAL
54A-268
STEP 1. Check that the powertrain control module
communicates with the scan tool.
Check if scan tool MB991958I can communicate with the
multi-center display.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Check if scan tool MB991958 can communicate with the
powertrain control module.
Q: Is the check result satisfactory?
YES : Go to Step 2.
NO : Refer to GROUP 13A, MFI Diagnostic Trouble Code
Chart
or GROUP 13B, MFI Diagnostic
Trouble Code Chart
STEP 2. Using scan tool MB991958, diagnose the CAN bus
line
Use scan tool MB991958 to diagnose the CAN bus lines.
Q: Is the check result satisfactory?
YES : Diagnose the power supply circuit. Refer to
NO : Repair the CAN bus lines (Refer to GROUP 54C,
Diagnosis-Can Bus Diagnostic Chart
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTI-CENTER DISPLAY
TSB Revision
CHASSIS ELECTRICAL
54A-269
INSPECTION PROCEDURE 2: The multi-center display does not Show any Information. (Middle Grade
type)
JOINT
CONNECTOR (2)
JOINT
CONNECTOR (1)
JOINT
CONNECTOR (2)
RELAY BOX
JUNCTION
BLOCK
BATTERY
IGNITION
SWITCH (ACC)
JOINT
CONNECTOR (2)
POWER SUPPLY
MULTI-CENTER
DISPLAY UNIT
RELAY
BOX
IGNITION
SWITCH (IG1)
Multi-Center Display Power Supply Circuit
MULTI-CENTER DISPLAY
TSB Revision
CHASSIS ELECTRICAL
54A-270
.
CIRCUIT OPERATION
The multi-center display unit (middle grade type) is
energized by the battery 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
• Malfunction of the multi-center display unit (mid-
dle grade type)
• Damaged wiring harness and connectors
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
AC305231CI
CONNECTORS: C-01, C-03, C-29
C-01
C-03
C-29
AC305233
C-05 (B)
CK
CONNECTOR: C-05
AC305415
CONNECTORS: C-211, C-215
JUNCTION BLOCK
(FRONT VIEW)
C-215
C-211
BA
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