Mitsubishi Lancer Evolution IX. Manual — part 267

BATTERY

CHASSIS ELECTRICAL

54A-5

BATTERY TEST

M1541001200614

BATTERY TESTING PROCEDURE

STEP 1. Check the battery cables.
Remove the negative cable, then the positive cable.
Check for dirty or corroded connections.

Q: Are the battery cables dirty or have corroded

connections?
YES :

Clean the battery cables. Then go to Step 2.

NO :

Go to Step 2.

STEP 2. Check the battery post.
Check for loose battery post.

Q: Are the battery post faulty?

YES :

Replace the battery. Then go to Step 4.

NO :

Go to Step 3.

STEP 3. Check the battery case and cover.
(1) Remove the hold-downs and shields.
(2) Check for broken/cracked case or cover.

Q: Is the battery case or cover faulty?

YES :

Replace the battery. Then go to Step 4.

NO :

Go to Step 4.

STEP 4. Check the open circuit voltage.
(1) Turn headlamps on for 15 seconds.

(2) Turn headlamps off for two minutes to allow

battery positive voltage to stabilize.

(3) Disconnect the battery cables.
(4) Read open circuit voltage.

Q: Is open circuit voltage 12.4 volts or more?

YES :

Go to Step 6.

NO :

Go to Step 5.

STEP 5. Charge battery.

Q: Charging the battery?

YES :

Go to Step 6.

NO :

Charge the battery at 5 amps for 15 hours.
Then re-test, go to Step 4.

STEP 6. Check the load test.
(1) Connect a load tester to the battery.
(2) Load the battery at the recommended discharge

rate (See LOAD TEST RATE CHART) for 15
seconds.

(3) Read voltage after 15 seconds, then remove

load.

(4) Compare the measured value with the minimum

voltage (See LOAD TEST CHART).

Q: Is the voltage higher than minimum voltage?

NO :

Replace the battery. Then go to Step 4.

YES :

The battery is normal.

LOAD TEST RATE CHART

Battery type

75D23L

Charging time when fully discharged h (5-amp. rated
current charging)

11

Load test (Amps)

260

LOAD TEST CHART

Temperature

°C

21 and
above

16

10

4

− 1

− 7

− 12

− 18

Minimum voltage

9.6

9.5

9.4

9.3

9.1

8.9

8.7

8.5

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-6

IGNITION SWITCH

GENERAL INFORMATION

M1543009901672

IGNITION KEY REMINDER BUZZER

The ignition key reminder buzzer will sound under
the following condition, and warn the driver to
remove the ignition key.

• The driver's door is opened when the ignition

switch is at "LOCK" (OFF) or "ACC" position with-
out removing the ignition key.

However, the lamp reminder buzzer will take prece-
dence over this function.

DOOR LOCK PREVENTION FUNCTION

If the key is left in the ignition switch while the driver’s
door opened or the assistant door opened, all door
are automatically unlock to prevent locking the igni-
tion key in the vehicle after door is locked.

IMMOBILIZER SYSTEM

The immobilizer system consists of the ignition key
with a transponder, the immobilizer-ECU, and the
engine-ECU. Only the registered ignition key permits
the engine to start, therefore, the engine can never
be started by means of a forged key or by connecting
the ignition wiring directly. The system is significantly
safe and reliable against theft. In addition, the driver
has only to turn the ignition switch to the "ON" posi-

tion to activate the immobilizer system. If the require-
ments for starting the engine are not satisfied, the
engine will be immobilized. If a registered ignition key
is lost, all your ignition keys need to be registered
again using M.U.T.-II/III to ensure security (Refer to

P.54A-22

). An additional ignition key can be regis-

tered as follows (only if no ignition keys are lost):

• Using M.U.T.-II/III (Refer to

P.54A-22

).

OPERATION

1. When the ignition switch is turned to "ON"

position, the engine-ECU sends a requirement for
the encrypted code to the immobilizer-ECU (at
this time, the engine is remobilised).

2. When the immobilizer-ECU receives the

requirement from the engine-ECU, the
immobilizer-ECU supplies power to the
transponder inside the ignition key via the
antenna. The energized transponder sends the
encrypted code back to the immobilizer-ECU via
the antenna.

3. The immobilizer-ECU judges the encrypted code

with its code logic in itself. If they are identical, the
immobilizer-ECU sends the encrypted code to the
engine-ECU.

4. If the engine-ECU can not receive the encrypted

code, the engine will be immobilized.

AC304482AC

Power (Wireless)

Encrypted code
(Wireless)

Ignition key

Control signal

Encrypted
code

Transponder

Immobilizer-ECU
with an antenna

Steering lock

CPU

M.U.T.-II/III

Memory

Engine-ECU

CPU

Injector

Ignition

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-7

Encrypted code registration criteria table

The ignition key contains a transponder (small trans-
mitter), which retains an unique encrypted code.
Under any of the conditions below, the encrypted
code should be registered in the immobilizer-ECU
again. The immobilizer-ECU can retain maximum
eight different encrypted codes. This means that
maximum eight ignition keys can be registered.

Component to be replaced

Engine-ECU

Immobilizer-ECU Ignition key

When engine-ECU is replaced −

Should be
replaced

Should be replaced
All ignition keys should be registered

When engine-ECU is
overwritten

*

−

Should not be
replaced

Should not be replaced
Should not be registered again

When immobilizer-ECU is
replace

Should not be
replaced

−

Should not be replaced
All ignition keys should be registered
again

When ignition key is added

Should not be
replaced

Should not be
replaced

• Additional ignition key should be

registered

• All ignition keys should be

registered again

When ignition key is lost

Should not be
replaced

Should not be
replaced

All the ignition keys other than the
lost one should be registered again

NOTE:

*

: When the engine-ECU other than immobi-

lizer system is rewritten, it is not necessary to regis-
ter the ignition key again.

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-8

SPECIAL TOOLS

M1543000603034

Tool

Number

Name

Use

B991502

MB991502

M.U.T.-II sub
assembly

• Immobilizer system check

• Encrypted code

registration

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USE

MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

M.U.T.-III
sub-assembly
A: Vehicle
Communication
Interface (V. C. I.)
B: M.U.T.-III USB
cable
C: M.U.T.-III Main
harness A (Vehicles
with CAN
communication
system)
D: M.U.T.-III Main
harness B (Vehicles
without CAN
communication
system)
E: M.U.T.-III
Measurement
adapter
F: M.U.T.-III Trigger
harness

• Immobilizer system check

• Encrypted code

registration

CAUTION

M.U.T.-III main harness B
(MB991911) should be used.
M.U.T.-III main harness A
should not be used for this
vehicle.