Mitsubishi Galant 9G. Manual — part 1550

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-72

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. Replace the ETACS-ECU and then recheck the
DTC.
Replace the ETACS-ECU, and then check that the DTC is not
reset.
Q: Is the check result satisfactory?

YES : Go to Step 4.
NO : Replace combination meter and then go to step 4.

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

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-73

SYMPTOM CHART

M1543007201116

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.

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE PAGE

Communication with scan tool is not possible.

1

P.54A-74

Power supply circuit.

2

P.54A-77

Odometer and trip meter are not displayed.

3

All the needle meters do not work.

4

When the ignition switch is turned to the ON position, the
indicator and warning lights do not illuminate.

5

Speedometer does not work.

6

P.54A-83

The fuel gauge needle moves excessively.

7

Tachometer does not work.

8

P.54A-87

Fuel Gauge does not work (other meters work).

9

P.54A-90

Engine coolant temperature gauge does not work (other meters
work).

10

P.54A-97

COMBINATION METER ASSEMBLY

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CHASSIS ELECTRICAL

54A-74

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1:Communication With Scan Tool is Not Possible.

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-75

.

CIRCUIT OPERATION

The combination meter is linked to the data link con-
nector via CAN bus line to communicate with the
scan tool.

.

TECHNICAL DESCRIPTION (COMMENT)

If the system does not communicate with scan tool,
power supply to 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.

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