Mitsubishi Lancer Evolution VI. Manual - part 105

CHASSIS ELECTRICAL – 

Combination Meters

54-24

TROUBLESHOOTING

INSPECTION CHART FOR TROUBLE SYMPTOMS

Trouble symptom

Inspection
procedure

Reference
page

Speedometer does not work.

1

54-24

Tachometer does not work.

2

54-25

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

Inspection Procedure 1

Speedometer does not work.

Probable cause

Examine the diagnosis codes registered in the engine-ECU. If no wheel speed
sensor-relating diagnosis code has been output, the wheel speed sensors are in order.

D

Malfunction of vehicle speed sensor

D

Malfunction of speedometer

D

Malfunction of harness or connector

D

Malfunction of relevant ECU

Disconnect the combination meter con-
nectors B-08 or B-09 and measure at
the harness sides.
1. Continuity between the terminal

No.11 and earth
OK: Continuity

2. Voltage between terminal No.51 and

earth.
OK: 4.7 V or more

3. Voltage between the terminal No.22

and earth
OK: System voltage

1.

NG

OK

Replace the speedometer.

YES

Vehicle speed sensor circuit system
inspection (Refer to Inspection
Procedure 3 on P.54-26.)

OK

Check the following connectors.
B-09, B-50

NG

Repair

OK

Check trouble symptom.

Check the harness between the body
earth and combination meter, and repair
if necessary.

NG

2.

NG

Check the following connectors.
B-08, B-64, A-19

NG

Repair

OK

Check trouble symptom.

Check the harness between the com-
bination meter and the vehicle speed
sensor, repair if necessary.

NG

3.

NG

Check the following connectors.
B-09, B-49, B-75, B-73

NG

Repair

OK

Check trouble symptom.

Check the harness between the power
supply and combination meter, and
repair if necessary.

NG

MUT-

II

 Self-Diag code

Is the diagnosis code 24 relating to MPI
system output?

CHASSIS ELECTRICAL – 

Combination Meters

54-25

Inspection Procedure 2

Tachometer does not work.

Probable cause

The ignition signal may not be input from the engine, or there may be a malfunction
in the power supply or earth circuit.

D

Malfunction of tachometer

D

Malfunction of harness or connector

Disconnect the combination meter con-
nector B-08 and measure at the harness
sides.
1. Measure the voltage between

terminal No.33 and earth.
OK: 5 V

2. Continuity between the terminal

No.34 and earth
OK: Continuity

3. Voltage between the terminal No.42

and earth
OK: System voltage

1.

NG

Check the following connectors.
B-08, A-36, B-61, B-64, A-41, A-109

NG

Repair

OK

Check trouble symptom.

NG

Check the harness between the  engine-
ECU and combination meter, and repair
if necessary.

2.

NG

Check the following connectors.
B-08, B-50, B-64, A-41

NG

Repair

OK

Check trouble symptom.

NG

Check the harness between the com-
bination meter and the body earth, and
repair if necessary.

OK

Replace the tachometer.

3.

NG

Check the following connectors.
B-08, B-75, B-76

NG

Repair

OK

Check trouble symptom.

NG

Check the harness between the power
supply and combination meter, and
repair if necessary.

YES

Refer to Group 13 – Troubleshooting,
No. 44 Ignition coils and power
transistors.

OK

MUT-

II 

Self-Diag code

Is the diagnosis code 44 relating to MPI
system output?

CHASSIS ELECTRICAL – 

Combination Meters

54-26

Inspection Procedure 3

Vehicle speed sensor circuit system inspection

Signals from the vehicle speed sensor are utilized both in the speedometer and the engine-ECU.

Vehicle speed sensor inspection (Refer to P.54-27.)

NG

Replace

OK

Disconnect the vehicle speed sensor connector A-19 and measure
at the harness side.
1. Voltage between the terminal No.1 and earth

OK:  System voltage

2. Continuity between terminal No.2 and earth

OK:  Continuity

3. Voltage between the terminal No.3 and earth

OK:  4.5 V or more

1.

NG

Check the following
connectors.  A-19, B-64

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the vehicle speed sensor and
multi-purpose fuse 4, and repair if necessary.

3.

NG

Check the following
connectors.  A-19, B-64,
B-08

NG

Repair

2.

NG

Check the following
connector.  A-19

NG

Repair

OK

Check trouble symptom.

NG

Check the harness between the vehicle speed sensor and combina-
tion meter, and repair if necessary.

OK

Check trouble symptom.

NG

Check the harness wire between the vehicle speed sensor and
body earth, and repair if necessary.

NOTE
If the trouble symptom still persists even after the above procedures are performed, check the vehicle
speed senosor output signal side circuit (harness, speedometer and engine ECU) for short-circuit.

CHASSIS ELECTRICAL – 

Combination Meters

CHASSIS ELECTRICAL – 

Combination Meters

54-27

ON-VEHICLE SERVICE

SPEEDOMETER CHECK

1.

Adjust the pressure of the tyres to the specified level.

2.

Set the vehicle onto a speedometer tester and use wheel
chocks to hold the rear wheels.

3.

Pull the parking brake lever firmly.

4.

To prevent the front wheel from moving from side to side,
attach tension bars to the tie-down hook, and secure
both ends to anchor plates.

5.

To prevent the vehicles from starting, attach a chain or
wire to the rear towing hook, and secure the other end
of the chain or wire firmly to an unmovable body.

6.

Check if the speedometer indication range is within the
standard values and if the pointer fluctuation is within
the limits.

Caution
Do not operate the clutch suddenly. Do not
increase/decrease  speed rapidly while testing.

Standard values:

Vehicle speed km/h

Speedometer indication
allowable errors km/h

40

37 – 45

80

75 – 88

120

113 – 132

160

150 – 176

Limit: Pointer fluctuation

(at vehicle speeds of higher than 35 km/h) 

±

3 km/h

TACHOMETER CHECK

1.

Insert a paper clip in the engine speed detection connector
from the harness side, and attach the engine
speedometer.

2.

Compare the readings of the engine speedometer and
the tachometer at every engine speed, and check if the
variations are within the standard values.

Standard values:

700 r/min : 

±

100 r/min

3,000

*1

 r/min : 

±

150 r/min

3,000

*2

 r/min : 

+

225 to –100 r/min

5,000

*1

 r/min : 

±

250 r/min

5,000

*2

 r/min : 

+

325 to –125 r/min

6,000

*1

 r/min : 

±

300 r/min

7,000

*2

 r/min :  

+

400 to –100 r/min

8,000

*3

 r/min :  

+

400 to 0 r/min

NOTE
*1: Tachometer measurable up to 8,000 r/min
*2: Tachometer measurable up to 9,000 r/min and one measurable up to 10,000 r/min
*3: Tachometer measureble up to 10,000 r/min

Wheel chocks

Tension bar

Tie-down hook

Front

Anchor plate

Engine speed detection
connector