Mitsubishi 380. Manual - part 868

 

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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.

 

 

 

 

 

 

 

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