Content .. 1497 1498 1499 1500 ..

Mitsubishi Galant (2004+). Manual - part 1499

MULTI-CENTER DISPLAY

TSB Revision

CHASSIS ELECTRICAL

54A-239

CAUTION

If DTC 010 is set in the multi-center display,
always diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the
communication circuit is normal.

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.

DTC SET CONDITION
If the multi-center display ceases communicating
once (i.e. bus off) and then returns to it, the
multi-center display will not communicate for three
minutes immediately after that point. This
three-minute period is called "Penalty mode." Imme-
diately after the multi-center display returns to com-
munication, the DTC is set.

TECHNICAL DESCRIPTION (COMMENT)
The CAN bus line wiring harness, connector(s), or
the multi-center display unit (middle grade type) 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.

• Malfunction of multi-center display unit (middle

grade type)

AC305206

CONNECTOR: A-02

A-02 (GR)

AC305216

B-19 (B)

CONNECTOR: B-19

AC305233

C-05 (B)

CONNECTOR: C-05

AC305231

C-02

C-29

C-101

C-125 (B)

CONNECTORS: C-02, C-29, C-101, C-125

MULTI-CENTER DISPLAY

TSB Revision

CHASSIS ELECTRICAL

54A-240

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)

STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
Use scan tool MB991958 to diagnose the CAN bus lines.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result satisfactory?

YES : Go to Step 2.
NO : Repair the CAN bus lines. (Refer to GROUP 54C,

Diagnosis-Can Bus Diagnostic Chart

P.54C-14

). On

completion, go to step 3.

STEP 2. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : Intermittent malfunction is suspected. Refer to

GROUP 00, How to Use Troubleshooting/Inspection
Service Points-How to Cope with Intermittent
Malfunction

P.00-6

NO : Replace combination meter and then go to step 3.

AC305412

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

MULTI-CENTER DISPLAY

TSB Revision

CHASSIS ELECTRICAL

54A-241

STEP 3. Recheck for diagnostic trouble code.
Recheck if the DTC is set.

1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.

Q: Is the check result satisfactory?

YES : The procedure is complete.
NO : Go to Step 1.

DTC 011: Powertrain Control Module Time-out (Related to Engine) DTC 012: Powertrain Control
Module Time-out (Related to A/T)

CAUTION

If DTC 011 or 012 is set in the multi-center dis-
play, always diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the
communication circuit is normal.

CIRCUIT OPERATION
Refer to

P.54A-238

DTC SET CONDITION

011

• The multi-center display unit (middle grade type)

receives engine control system-related signals
from the powertrain control module via CAN bus
lines. If the display unit can not receives the nec-
essary signals, DTC 011 will be set.

012

• The multi-center display unit (middle grade type)

receives A/T control system-related signals from
the power control module via CAN bus lines. If
the display unit can not receive the necessary
signals, DTC 012 will be set.

TECHNICAL DESCRIPTION (COMMENT)

CAUTION

If the ignition switch is turned to the ON position
without starting the engine, DTC (past trouble)
013 and 014 may be set on the combination
meter (incorporating meter-ECU) after three min-
utes.

Current trouble

• Connector(s) or wiring harness in the CAN bus

lines between the powertrain control module and
the multi-center display unit (middle grade type),
the power supply system to the display unit, the
display unit itself, or the powertrain control mod-
ule may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on

connector(s) or wiring harness in the CAN bus
lines between the powertrain control module and
the multi-center display unit (middle grade type),
and the power supply system to the powertrain
control module. For diagnosis procedures, refer
to "How to cope with past trouble" (Refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points

P.00-6

NOTE: For a past trouble, you may not find it by
the MUT-III CAN bus diagnostics even if there is
any failure in CAN bus lines. In this case, refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points-How to Cope with Intermittent
Malfunction

P.00-6

.) and check the CAN bus

lines. You can narrow down the possible cause of
the trouble by referring to the DTC, which is set
regarding the CAN communication-linked ECUs
(Refer to GROUP 54C, CAN bus line Diagnostics
Flow

P.54C-6