Mitsubishi Galant (2004+). Manual - part 1456

 

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Mitsubishi Galant (2004+). Manual - part 1456

 

 

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-67

CAUTION

If DTC U1109 is set in the combination meter, 
diagnose the CAN main bus line.

CAUTION

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

.

CIRCUIT OPERATION
The ETACS-ECU communicates with the combina-
tion meter and the powertrain control module via 
CAN bus line to obtain necessary information. Both 
the combination meter and the powertrain control 
module have terminator resistors.

.

DTC SET CONDITION
The combination meter receives signal from the 
ETACS-ECU via CAN bus lines. If it can not receive 
all the necessary signals from the ETACS-ECU, DTC 
U1109 is set.

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

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

lines between the ETACS-ECU and the combina-
tion meter, the power supply system to the 
ETACS-ECU, the ETACS-ECU itself, or the com-
bination meter may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the ETACS-ECU and the combina-
tion meter, and the power supply system to the 
ETACS-ECU. For diagnosis procedures, refer to 
"How to cope with past trouble" (Refer to GROUP 
00, How to Use Troubleshooting/Inspection Ser-
vice 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 
Malfunctio

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

).

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

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

• Malfunction of ETACS-ECU

• Malfunction of combination meter (incorporating 

ECU) 

AC305206

CONNECTOR: A-02

AO

A-02 (GR)

AC305216

B-19 (B)

CONNECTOR: B-19

AD

AC305231

C-02

C-29

C-101

DD

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

AC305413AL

CONNECTOR: C-218

C-218 (GR)

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-68

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 4.

STEP 2. Using scan tool, MB991958, read the ETACS-ECU 
diagnostic trouble code.
Check that the ETACS-ECU sets a DTC.
Q: Is the DTC set?

YES : Diagnose the SWS system by referring to 

P.54B-27

.

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the multi-center 
display diagnostic trouble code.
Check if a DTC, which relates to CAN communication-linked 
systems below, is set.

• Multi-center display

DTC 019: ETACS-ECU time-out

Q: Is the DTC set?

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

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-69

STEP 4. 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 : A poor connection, open circuit or other intermittent 

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

P.00-6

).

NO :  Replace ETACS-ECU and then go to step 6.

STEP 5. 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 : A poor connection, open circuit or other intermittent 

malfunction is present in the lines between the 
ETACS-ECU and the combination meter (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 6.

STEP 6. 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.

COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR

TSB Revision

CHASSIS ELECTRICAL

54A-70

DTC U1112: SRS-ECU Time-out

CAUTION

If DTC U1112 is set in the combination meter, 
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-57

.

.

DTC SET CONDITION
The combination meter communicates with the 
SRS-ECU through CAN bus lines. If it can not 
receive all the necessary signals from the SRS-ECU, 
DTC U1112 is set.

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

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

lines between the SRS-ECU and the combination 
meter, the power supply system to the SRS-ECU, 
the SRS-ECU itself, or the combination meter 
may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the SRS-ECU and the combination 
meter, and the power supply system to the 
SRS-ECU. For diagnosis procedures, refer to 
"How to cope with past trouble" (Refer to GROUP 
00, How to Use Troubleshooting/Inspection Ser-
vice 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 
Malfunctio

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

).

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

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

• Malfunction of SRS-ECU

• Malfunction of combination meter 

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)

 

 

 

 

 

 

 

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