Mitsubishi Lancer Evolution VI. Manual - part 100

CHASSIS ELECTRICAL – 

Battery

54-4

CHARGING

1.

When charging a battery while still installed in the vehicle,
disconnect the battery cables to prevent damage to
electrical parts.

2.

The current normally used for charging a battery should
be approximately 1/10th of the battery capacity.

3.

When performing a quick-charging due to lack of time,
etc., the charging current should never exceed the battery
capacity as indicated in amperes.

4.

Determining if charging is completed.
(1) If the specific gravity of the battery fluid reaches

1.250 – 1.290 and remains constant for at least one
hour.

(2) If the voltage of each cell reaches 2.5– 2.8 V and

remains constant for at least one hour.

Caution
1.

Be careful since the battery fluid level may rise
during charging.

2.

Keep all sources of fire away while charging
because there is a danger of explosion.

3.

Be careful not to do anything that could generate
sparks while charging.

4.

When charging is completed, replace the battery
caps, pour clean water over the battery to remove
any sulfuric acid and dry.

CHASSIS ELECTRICAL – 

Battery

54-5

BATTERY TESTING PROCEDURE

TEST STEP

(1) Turn headlamps on for 15 seconds.
(2) Turn headlamps off for 2 minutes to allow battery voltage to

stabilize.

(3) Disconnect cables.

Read open circuit voltage.

OK: Open circuit voltage is more than 12.4 V

NG

Charge battery at 5 amps. (see LOAD TEST RATE CHART)

Retest

OK

(1) Connect a load tester to the battery.
(2) Load the battery at the recommended discharge rate (see LOAD

TEST RATE CHART).

(3) Read voltage after 15 seconds, then remove load.
(4) Compare the measured value with the minimum voltage (see

LOAD TEST CHART).
OK: Higher than minimum voltage

NG

Replace battery

OK

Normal

LOAD TEST RATE CHART

Battery type

28B19L

34B19L

44B20L

95D31L

55D23L

55B24L

Charging time when fully discharged h 
[5-amp rated current charging]

5

6

7

13

10

8

Load test (Amps)

120

130

160

310

170

170

LOAD TEST CHART

Temperature 

_

C

21 and 
above

16 to
20

10 to
15

4 to 9

–1 to 3

–7 to
–2

–12 to
–8

–18 to
–13

Minimum voltage V

9.6

9.5

9.4

9.3

9.1

8.9

8.7

8.5

CHASSIS ELECTRICAL – 

Ignition Switch

CHASSIS ELECTRICAL – 

Ignition Switch

54-6

IGNITION SWITCH <EXCEPT EVOLUTION-VI WITH
IMMOBILIZER SYSTEM>

SPECIAL TOOL

Tool

Number

Name

Use

MB991502

MUT-

II

 sub 

assembly

ETACS-ECU input signal checking

TROUBLESHOOTING

DIAGNOSIS FUNCTION

INPUT SIGNAL INSPECTION POINTS <VEHICLES
WITH ETACS-ECU>

Refer to Group 00 – How to Use Troubleshooting / Inspection
Service Points.

INSPECTION CHART FOR TROUBLE SYMPTOMS

Trouble symptoms

Inspection 
procedure

Reference page

Communication with
MUT

II

is impossible

Key hole illumination lamp remains illuminated.

1

54-7

MUT

-II

 is impossible.

Even if driver’s side door is opened, key hole
illumination lamp does not illuminate.

2

54-7

While key hole illumination lamp is illuminated,
ignition key is turned to the ON position but key hole
illumination lamp does not switch off. (However, it
switch off after 10 seconds.)

3

54-8

Key reminder warning
buzzer system

While the key reminder warning buzzer is sounding,
the ignition key is turned to the ON position but the
sound dose not stop. (However, it stops when the
driver’s side door is closed.)

3

54-8

The key reminder warning buzzer dose not stop
sounding even if the key is removed. (However, it
stops when the driver’s side door is closed.)

4

54-9

The key reminder warning buzzer does not sound
ever if the driver’s side door is opened while the key
is still inserted. (However, the ignition key should be
in the OFF position.)

5

54-10

NOTE
If every input signal can not be checked with the MUT-

II

, a diagnosis circuit system failure is probably

the cause. <Vehicles with ETACS-ECU>

CHASSIS ELECTRICAL – 

Ignition Switch

54-7

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

Inspection Procedure 1

Key hole illumination lamp remains illuminated.

Probable cause

The cause is probably a harness short or a defective ETACS-ECU or buzzer ECU.

D

Malfunction of harness wire

D

Malfunction of ETACS-ECU

D

Malfunction of buzzer ECU

Disconnect the ignition key cylinder illumination lamp connector
B-84 and measure the continuity:

D

Between 4 and body earth

OK: Conducting

NG

Check the harness wire between the ignition key cylinder illumination
lamp and junction block, and repair if necessary.

OK

Replace the  ETACS-ECU or buzzer ECU.

Inspection Procedure 2

Even if driver’s side door is opened, key hole illumination
lamp does not illuminate.

Probable cause

The cause is probably a defective key hole illumination lamp circuit system, or a
defective driver’s side door switch input circuit system if the ignition key reminder
warning buzzer is also faulty.

D

Malfunction of driver’s side door switch

D

Malfunction of bulb

D

Malfunction of connector

D

Malfunction of harness wire

D

Malfunction of ETACS-ECU

D

Malfunction of buzzer ECU

OK

Replace ETACS-ECU or buzzer ECU.

<Vehicles with ETACS-ECU>
MUT-

II

 Pulse check

Driver’s side door switch input signal
OK: The MUT-II buzzer sounds once

when the driver’s side door switch
is ON.

NG

Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)

OK

Disconncet the key hole illumination
lamp connector B-84, and measure at
the harness side.

D

Voltage between 3 and body earth

OK: System voltage

NG

Check the following connectors:
B-49, B-75, B-73

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between
ETACS-ECU or buzzer ECU and fusible
link 1, and repair if necessary.

Vehicle with buzzer ECU

Remove ETACS-ECU or buzzer ECU
from junction block, and measure at the
junction block connector B-79

D

Ignition key cylinder illumination
lamp connector connected

D

Voltage between 12 and body earth

OK: System voltage

OK

OK

NG

Check the following connectors:
B-84, B-49, B-75, B-73

NG

Repair

OK

Check trouble symptom.

Check the harness wire between the
ignition  key cylinder illumination lamp
and fusible link 1, and repair if neces-
sary.

NG