Mitsubishi Galant (2004+). Manual - part 215

DIAGNOSTIC TROUBLE CODE PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-51

STEP 3. Using scan tool MB991958 check for any 
diagnostic trouble code.

Check if a DTC, which relates to CAN communication-linked 
systems below, is set.

• Engine

Meter-related time-out DTC

• Multi center display (middle-grade type) <Vehicles with 

multi center display (middle-grade type)>
Meter-related time-out DTC

(1) Turn the ignition switch to the "ON" position.
(2) Check for a DTC related to the relevant system.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

STEP 4. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the combination meter. On completion, 

check that the DTC is not reset.

NO :  A poor connection, open circuit or other intermittent 

malfunction is present in the CAN bus lines between 
the combination meter and the ETACS-ECU (Refer to 
GROUP 00, How to Use Troubleshooting/Inspection 
Service Points-How to Cope with Intermittent 
Malfunction 

P.00-6

).

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSTIC TROUBLE CODE PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-52

STEP 5. Recheck for diagnostic trouble code.

Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the ETACS-ECU. On completion, check that 

the DTC is not reset.

NO :  A poor connection, open circuit or other intermittent 

malfunction is present in the CAN bus lines between 
the combination meter and the ETACS-ECU (Refer to 
GROUP 00, How to Use Troubleshooting/Inspection 
Service Points-How to Cope with Intermittent 
Malfunction 

P.00-6

).

DTC 015: Multi center Display Unit (Middle Grade Type) Time-out.

CAUTION

DTC 015 may also be set on vehicles with the 
multi center display (low-grade type). This is 
because the display unit does not communicate 
through the CAN bus lines, and there is no fault.

CAUTION

If DTC 015 is set in the ETACS-ECU, always diag-
nose the CAN main bus line.

CAUTION

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

.

TROUBLE JUDGMENT
The ETACS-ECU receives multi center dis-
play-related signal from the multi center display (mid-
dle-grade type). If the ECU cannot receive the signal, 
DTC 015 will be set.

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

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

lines between the multi center display unit (mid-
dle-grade type) and the ETACS-ECU, the power 
supply system to the multi center display unit 
(middle-grade type), the multi center display unit 
(middle-grade type) itself, or the ETACS-ECU 
may be defective.

Past trouble

• If DTC 015 is stored as a past trouble, carry out 

diagnosis with particular emphasis on wiring and 
connector(s) in the CAN bus line between the 
multi center display unit (middle-grade type) and 
the ETACS-ECU, and the power supply system to 
the multi center display unit (middle-grade type.) 
For diagnosis procedures, refer to "How to cope 
with past trouble" (Refer to GROUP 00, How to 
Use Troubleshooting/Inspection Service Points 

P.00-6

).

NOTE: You cannot find a past trouble, by the 
MUT-III CAN bus diagnostics even if there is a 
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. 

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSTIC TROUBLE CODE PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-53

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 Diagnostic 
Flow 

P.54C-6

).

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• Malfunction of the multi center display (mid-

dle-grade type)

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

SWS monitor 

P.54B-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-14

).

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSTIC TROUBLE CODE PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-54

STEP 2. Using scan tool MB991958, read the multi center 
display diagnostic trouble code.

Check that the multi center display unit sets a DTC.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the multi center display DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the multi center display unit (middle-grade 

type) (Refer to GROUP 54A, Diagnosis 

P.54A-237

).

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C 
diagnostic trouble code.

Check if a multi center display-related DTC is set in the A/C 
system.
(1) Turn the ignition switch to the "ON" position.
(2) Check whether A/C system-related DTC is set.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Go to Step 4.
NO :  Go to Step 5.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827