Mitsubishi Galant 9G. Manual — part 1545

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-52

DIAGNOSTIC TROUBLE CODE CHART

M1543007100440

CAUTION

During diagnosis, a DTC code associated with
other system may be set when the ignition switch
is turned on with connector(s) disconnected. On
completion, confirm all systems for DTC code(s).
If DTC code(s) are set, erase them all.

DTC NO. Diagnostic item

REFERENCE PAGE

U1073

Bus off

P.54A-53

U1100

Powertrain control module time-out (related to engine)

P.54A-56

U1101

Powertrain control module time-out (related to A/T)

U1102

ABS-ECU time-out

P.54A-59

U1109

ETACS-ECU time-out

P.54A-63

U1112

SRS-ECU time-out

P.54A-66

U1120

Failure information on powertrain control module (related to engine)

P.54A-68

U1206

Flag invalid

P.54A-71

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-53

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC U1073: Bus Off

WITHOUT ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)

WITHOUT ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)

WITH ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)

WITH ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)

ABS-ECU OR ABS/TCL-ECU

JOINT
CONNECTOR (3)

POWERTRAIN
CONTROL
MODULE

COMBINATION
METER

CPU

DATA LINK CONNECTOR

Combinaton Meter CAN-BUS Line Circuit

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-54

CAUTION

If DTC U1073 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

Some instruments of the combination meter are
linked to the CAN bus line. Both the combination
meter and the powertrain control module have a ter-
minator resistor.

.

DTC SET CONDITION

If the combination meter ceases communicating
once (i.e. bus off) and then returns to it, the combina-
tion meter will not communicate for five minutes
immediately after that point. This five minute period
is called "Penalty mode." Immediately after the com-
bination meter returns to communication, the DTC is
set.

.

TECHNICAL DESCRIPTION (COMMENT)

The wiring harness or connectors may have loose,
corroded, or damage terminals, or terminals pushed
back in the connector, or the combination meter 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 combination meter.

AC305206

CONNECTOR: A-02

AO

A-02 (GR)

AC305216

B-19 (B)

CONNECTOR: B-19

AD

AC305231

C-02

C-29

C-101

C-125 (B)

DC

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

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-55

DIAGNOSIS

Required Special Tools:

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

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

• MB991827: MUT-III USB Cable

• MB991910: 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-607

).

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 : An intermittent malfunction is suspected. Refer to

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

P.00-14

.

NO : Replace combination meter.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827