Mitsubishi Colt Ralliart. Manual - part 476

COMBINATION METER

CHASSIS ELECTRICAL

54A-49

Inspection Procedure 6: Speedometer does not Work (Other Meters Work). 

 

Inspection Procedure 7: The Fuel Gauge Needle Moves Excessively.

DIAGNOSIS 
CONNECTOR

INPUT SIGNAL

FRONT SIDE

COMBINATION 
METER

CPU

SPEED

SECONDARY SPEED SENSOR

Speedometer Circuit

ENGINE-ECU <M/T>
ENGINE-CVT-ECU <CVT>

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

Main

Index

Group

TOC

COMBINATION METER

CHASSIS ELECTRICAL

54A-50

CAUTION

When the battery cable is disconnected or the 
combination meter is removed, the fuel gauge 
learned value will be erased. To let the display 
unit re-learn it, enter the vehicle speed (by driv-
ing the vehicle or entering simulated vehicle 
speed) and then stop the vehicle.

COMMENTS ON TROUBLE SYMPTOM

If only the speedometer does not operate, the 
engine-ECU <M/T> or engine-CVT-ECU <CVT> sys-
tem, the combination meter, the wiring harness or its 
connector may be defective. Furthermore, incorrect 
level of fuel is shown on the gauge, because the dis-
play unit can not learn the fuel gauge.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of engine-ECU <M/T> or 

engine-CVT-ECU <CVT>

• Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54D, Diagnosis - Can Bus Diagnostics Table 

P.54D-13

). After diagnosing the CAN bus 

lines, go to Step 5.

STEP 2. M.U.T.-III diagnosis code
Check whether the MPI system-related diagnosis 
code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose MPI system. (Refer to GROUP 

13A <4A9>, Troubleshooting 

P.13A-20

, or 

GROUP 13B <4G1>, Troubleshooting 

P.13B-18

.) After diagnosing the MPI 

system, go to Step 5.

NO : 

Go to Step 3.

STEP 3. M.U.T.-III data list

• Item No.82: Vehicle speed sensor malfunction 

flag (Refer to 

P.54A-59

).

• Item No.83: Vehicle speed sensor definite flag 

(Refer to 

P.54A-59

).

• Item No.84: Vehicle stopped flag (Refer to 

P.54A-59

).

Q: Is the check result satisfactory?

YES : 

Go to Step 4.

NO : 

Diagnose MPI system. (Refer to GROUP 
13A <4A9>, Troubleshooting 

P.13A-20

, or 

GROUP 13B <4G1>, Troubleshooting 

P.13B-18

.) After diagnosing the MPI 

system, go to Step 5.

STEP 4. Check the speedometer.
(1) Connect the M.U.T.-III to the diagnosis connector.
(2) Use the M.U.T.-III to enter simulated vehicle 

speed.

OK: The speedometer shows that simu-
lated vehicle speed.

Q: Is the check result satisfactory?

YES : 

Go to Step 5.

NO : 

Replace combination meter, then go to Step 
5.

STEP 5. Retest the system.
Check that the speedometer works normally.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Main

Index

Group

TOC

COMBINATION METER

CHASSIS ELECTRICAL

54A-51

Inspection Procedure 8: Tachometer does not Work (Other Meters Work).

Tachometer Circuit

DIAGNOSIS 
CONNECTOR

ENGINE-ECU <M/T>
ENGINE-CVT-ECU <CVT>

INPUT SIGNAL

FRONT SIDE

COMBINATION 
METER

CPU

TACHO

SECONDARY SPEED SENSOR

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

Main

Index

Group

TOC

COMBINATION METER

CHASSIS ELECTRICAL

54A-52

COMMENTS ON TROUBLE SYMPTOM

If only the tachometer does not operate, the 
engine-ECU <M/T> or engine-CVT-ECU <CVT> sys-
tem may not be sending ignition signal, or the combi-
nation meter, the wiring harness or its connector may 
be defective.

POSSIBLE CAUSES

• Malfunction of combination meter

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54D, Diagnosis - Can Bus Diagnostics Table 

P.54D-13

). After diagnosing the CAN bus 

lines, go to Step 5.

STEP 2. M.U.T.-III other system diagnosis code
Check whether the MPI system-related diagnosis 
code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose MPI system. (Refer to GROUP 

13A <4A9>, Troubleshooting 

P.13A-20

, or 

GROUP 13B <4G1>, Troubleshooting 

P.13B-18

.) After diagnosing the MPI 

system, go to Step 5.

NO : 

Go to Step 3.

STEP 3. M.U.T.-III data list

• Item No.87: Tachometer (Refer to 

P.54A-59

.)

Q: Is the check result satisfactory?

YES : 

Go to Step 4.

NO : 

Diagnose MPI system. (Refer to GROUP 
13A <4A9>, Troubleshooting 

P.13A-20

, or 

GROUP 13B <4G1>, Troubleshooting 

P.13B-18

.) After diagnosing the MPI 

system, go to Step 5.

STEP 4. M.U.T.-III actuator test

• Item No.84: Tachometer: 0 r/min

• Item No.85: Tachometer: 2000 r/min

• Item No.86: Tachometer: 5000 r/min

OK: The tachometer operates.

Q: Is the check result satisfactory?

YES : 

Go to Step 5.

NO : 

Replace the combination meter and then go 
to Step 5.

STEP 5. Retest the system.
Check that the tachometer works normally.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Main

Index

Group

TOC