Mitsubishi 380. Manual — part 868

BATTERY

CHASSIS ELECTRICAL

54A-6

7. Clean the inside surfaces of the terminal clamps with a

suitable battery terminal cleaning tool. Replace damaged or
frayed cables and broken terminal clamps.

8. Install the battery in the vehicle.

9. Connect the positive and negative cables to the battery in

the order of mention.

10.Tighten the clamp nut securely.

BATTERY CHARGING

M1541001100521

WARNING

When batteries are being charged, an explosive gas forms beneath the cover of each cell. Do
not smoke near batteries on charge or which have recently been charged. Do not break live
circuits at the terminals of the batteries on charge. A spark will occur where the live circuit is
broken. Keep all open flames away from the battery.

Battery electrolyte temperature may temporarily be
allowed to rise to 55

°C. Increase of electrolyte tem-

perature above 55

°C is harmful to the battery, caus-

ing deformation of battery cell, decrease in life of
battery, etc.

CHARGE RATE

If the test indicator is white, the battery should be charged as outlined below. When the dot appears or when
maximum charge shown below is reached, charging should be stopped.

.

Charge Rate Chart

BATTERY TEST

M1541001200528

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 posts 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 5.

NO :

Charge the battery at 5 amps for 10.4 hours.
Then re-test.

BATTERY

Slow charging

5 amps 15 hours

Fast charging

20 amps 3.75 hours

BATTERY

CHASSIS ELECTRICAL

54A-7

STEP 5. 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?

YES :

The battery is normal.

NO :

Replace the battery. Then go to Step 4.

LOAD TEST RATE CHART

LOAD TEST CHART

Load test

Cranking ratio (0

°C)

600 amps

Reserve capacity

115 minutes

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-8

IGNITION SWITCH

GENERAL DESCRIPTION

M1543000100535

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, the key ring antenna, ETACS-ECU, and the
Engine-ECU. The ignition key has a built-in tran-
sponder. The key ring antenna is installed on the
steering lock key cylinder. Only the registered igni-
tion 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" position to activate the
IMMOBILIZER system. If the requirements for start-
ing the engine are not satisfied, the engine will be
immobilised. If a registered ignition key is lost, all
your ignition keys need to be registered again using
diagnostic tool MB991958 (MUT-III Sub Assembly) to
ensure security (Refer to

P.54A-37

). An additional

ignition key can be registered as follows (only if no
ignition keys are lost):

• Using diagnostic tool MB991958 (MUT-III Sub

Assembly) (Refer to

P.54A-37

).

• By operating two ignition keys that have been

already registered (Refer to

P.54A-37

).

.

OPERATION

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

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

2. When the ETACS-ECU receives the requirement

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

3. The ETACS-ECU judges the encrypted code with

its code logic in itself. If they are identical, the
ETACS-ECU sends the encrypted code to the
Engine-ECU.

4. If the Engine-ECU cannot receive the encrypted

code, the engine will be immobilised.

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-9

CAUTION WHEN REPLACING IMMOBILIZER SYSTEM RELATED PARTS

To replace IMMOBILIZER system related parts, refer to the table below. When the ignition key is re-registered
with diagnostic tool MB991958, the originally registered ignition key registration information will be lost.

54DB001A

TRANS-
PONDER

POWER
(WIRELESS)

ENCRYPTED
CODE (WIRELESS)

MUT-III

ENGINE

ECU

CONTROL

SIGNAL

CAN-BUS

IGNITION
KEY RING
ANTENNA

ETACS

ECU

ITEMS

Engine-ECU

ETACS- ECU

IGNITION KEY

When replacing Engine-ECU -

Replacement is not
required

Replacement is not required.
All ignition keys re-registration
are required.

When rewriting Engine-ECU -

Replacement is not
required

Replacement is not required.
Re-registration is not required.

When replacing
ETACS-ECU

Replacement not
required

-

Replacement is not required.
All ignition keys re-registration
are required.

When adding new ignition
keys (if registered ignition
keys are not lost)

Replacement not
required

Replacement is not
required

Re-register all ignition keys to
be registered (including new
keys).

When adding new ignition
keys (if registered ignition
keys are lost)

Replacement not
required

Replacement is not
required

Re-register all ignition keys.