Mitsubishi Lancer Evolution IX. Manual - part 277

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-45

Q: Is the wiring harness between fuel gauge unit (sub) 

connector D-10 (terminal 1) and combination meter 
connector C-02 (terminal 51) in good condition?
YES : 

Go to Step 8.

NO : 

Repair the wiring harness. The fuel gauge 
should work normally.

STEP 8. Check the wiring harness between fuel 
gauge unit (sub) connector D-10 (terminal 2) and 
fuel gauge unit (main) connector D-12 (terminal 
2).

AC310465

AK

D-10

D-10

D-12(GR)

Harness side

D-12
Harness side

Connectors: D-10, D-12

Q: Is the wiring harness between fuel gauge unit (sub) 

connector D-10 (terminal 2) and fuel gauge unit 
(main) connector D-12 (terminal 2) in good 
condition?
YES : 

Repair or replace the combination meter. 

The fuel gauge should work normally.

NO : 

Repair the wiring harness. The fuel gauge 
should work normally.

INSPECTION PROCEDURE 4: Engine Coolant Temperature Gauge does not Work.

COMBINATION
METER

CONTROL
CIRCUIT

T/GA

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

ENGINE COOLANT
TEMPERATURE
GAUGE UNIT

NOTE

: L.H. drive vehicles
: R.H. drive vehicles

Engine Coolant Temperature Gauge Circuit

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-46

TECHNICAL DESCRIPTION (COMMENT)

If only the engine coolant temperature gauge does 
not operate, the combination meter, the wiring har-
ness or its connector may be defective.

TROUBLESHOOTING HINTS

• Malfunction of the engine coolant temperature 

gauge unit

• The wiring harness or connectors may have 

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

• Malfunction of the combination meter.

DIAGNOSIS PROCEDURE 

STEP 1. Check the other meters.

Check to see that the speedometer, tachometer 
and engine coolant temperature gauge unit 
operate normally.

Q: Do all other meters operate?

Yes <other meters all operate> : 

Go to Step 2.

NO <one or more of the other meters does not 
operate.>  : 

Refer to 

P.54A-48

.

STEP 2. Check engine coolant temperature 
gauge unit connector B-112 for loose, corroded 
or damaged terminals, or terminals pushed back 
in the connector.

AC310439

Connector: B-112

Harness side

B-112 (B)

AH

Q: Is engine coolant temperature gauge unit 

connector B-112 in good condition?
YES : 

Go to Step 3.

NO : 

Repair or replace the damaged 
component(s). The engine coolant 
temperature gauge unit should work 
normally.

STEP 3. Check the engine coolant temperature 
gauge unit.
Check to see that the engine coolant temperature 
gauge unit operate normally. Refer to 

P.54A-56

.

Q:  Is the engine coolant temperature gauge unit 

normal?
YES : 

Go to Step 4.

NO : 

Replace the engine coolant temperature 
gauge unit. The engine coolant temperature 
gauge unit should work normally.

STEP 4. Check combination meter connector 
C-02 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.

AC310446

Connector : C-02
<L.H. drive vehicles> 

Harness side

BG

C-02(L)

AC310456

Connector : C-02
<R.H. drive vehicles> 

Harness side

AV

C-02(L)

Q: Is combination meter connector C-02 in good 

condition?
YES : 

Go to Step 5.

NO : 

Repair or replace the damaged 
component(s). The engine coolant 
temperature gauge unit should work 
normally.

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-47

STEP 5. Check the wiring harness between 
engine coolant temperature gauge unit 
connector B-112 (terminal 1) and combination 
meter connector C-02 (terminal 50).

AC310439

Connector: B-112

Harness side

B-112 (B)

AH

AC310447

Connectors : C-02, C-124
<L.H. drive vehicles> 

C-02(L)

C-124

Harness side

AW

C-02

C-124

AC310456

Connector : C-02
<R.H. drive vehicles> 

Harness side

AV

C-02(L)

AC310454

Connector : C-124
<R.H. drive vehicles> 

BR

NOTE: Also check intermediate connector C-124 for 
loose, corroded, or damaged terminals, or terminals 
pushed back in the connector. If intermediate con-
nector C-124 is damaged, repair or replace the con-
nector.

Q: Are the wiring harness between engine coolant 

temperature gauge unit connector B-112 (terminal 
1) and combination meter connector C-02 (terminal 
50) in good condition?
YES : 

Repair or replace the combination meter. 

The engine coolant temperature gauge unit 
should work normally.

NO : 

Repair the wiring harness. The engine 
coolant temperature gauge unit should work 
normally.

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-48

INSPECTION PROCEDURE 5: Combination meter does not work.

IGNITION
SWITCH (IG1)

R.H. drive vehicles

L.H. drive vehicles

BATTERY

RELAY
BOX

CONTROL CIRCUIT

COMBINATION
METER

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

NOTE

: L.H. drive vehicles
: R.H. drive vehicles

Combination Meter Power Source Circuit

TECHNICAL DESCRIPTION (COMMENT)

The cause is thought to be malfunction of the power, 
earth circuitry or combination meter.

TROUBLESHOOTING HINTS

• Malfunction of the combination meter 

• Damaged wiring harness or connectors