Mitsubishi Montero Sport (2004+). Manual — part 505

BATTERY

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CHASSIS ELECTRICAL

54-7

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

NOTE: *: Time which elapses before the engine can
be started.

BATTERY TEST

M1541001200551

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 headlights on for 15 seconds.
(2) Turn headlights 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.

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 CHART

BATTERY

75D23R (520 amps)

80D26R (582 amps)

Slow charging

5 amps 10.4 hours

5 amps 12 hours

10 amps 5.2 hours

10 amps 16 hours

Fast charging

20 amps 2.5 hours

20 amps 2.5 hours

30 amps 1.5 hours

30 amps 1.5 hours*

TEMPERATURE
°C (°F)

21 (70)
AND
ABOVE

16 (60)

10 (50)

4 (40)

−1 (30)

−7 (20)

−12 (10) −18 (0)

Minimum voltage

9.6

9.5

9.4

9.3

9.1

8.9

8.7

8.5

IGNITION SWITCH

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CHASSIS ELECTRICAL

54-8

LOAD TEST RATE CHART

IGNITION SWITCH

IGNITION SWITCH AND IMMOBILIZER SYSTEM

M1543009900903

GENERAL DESCRIPTION

.

Ignition key reminder tone alarm
The ignition key reminder tone alarm 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.
However, the light reminder tone alarm will take pre-
cedence over this function.

.

Ignition key hole illumination light
If the driver's door is opened when the ignition key is
not inserted in the ignition key cylinder or the ignition
switch is at "ACC" or "LOCK" (OFF) position, the
ignition key hole will be illuminated. Then, after the
driver's door is closed, the key hole will be extin-
guished in approximately 15 seconds.

.

Immobilizer system
The immobilizer system consists of the ignition key,
the key ring antenna, the immobilizer-ECU, and the
PCM. The ignition key has a built-in transponder. The
key ring antenna is installed on the steering lock key
cylinder. 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 the ignition key is lost
or another ignition key is added, the encrypted code
can be registered or erased by using scan tool. If the
ignition switch is turned to the "ON" position by using
the ignition key, which does not include the transpon-
der, includes an unregistered transponder, or has an
incorrect ID code, "SECURITY" indicator inside the
combination meter will flash.

EQUIPMENT DIAGNOSIS

IGNITION SWITCH DIAGNOSIS

M1543009900914

INTRODUCTION TO IGNITION SWITCH DIAGNOSIS

An ETACS-ECU is mounted in all vehicles. This
ETACS-ECU controls the ignition key reminder and
ignition key hole illumination light timer. The ignition
key reminder tone alarm alerts the driver that the
ignition key has not been removed. If any of the fol-
lowing symptoms occur, there is a malfunction:

• The tone alarm does not stop sounding when the

ignition key is turned to the "ON" position.

• The tone alarm does not stop sounding when the

ignition key is removed.

• The tone alarm does not sound when the ignition

key is inserted (turned to the "OFF" position) and
the driver's door is opened.

The ignition key hole illumination light timer illumi-
nates the ignition switch for certain conditions. If any
of the following symptoms occur, there is a malfunc-
tion:

• The ignition key hole illumination light does not

go off.

• The ignition key hole illumination light does not

illuminate when the driver's door is opened.

• The ignition key hole illumination light does not

go out when the ignition key is turned to the "ON"
position.

Load test

300 amps

300 amps

Cranking ratio [

−18°C (0°F)]

520 amps

582 amps

Reserve capacity

118 minutes

133 minutes

Application

75D23R

80D26R

IGNITION SWITCH

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IGNITION SWITCH DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1543006900487

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
ignition switch fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify that the malfunction is eliminated.

DIAGNOSIS FUNCTION

M1543007000498

HOW TO CONNECT SCAN TOOL (MUT-III)

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without

CAN communication system)

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF)

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824

and the personal computer.

4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"

position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.

7. Start the MUT-III system on the personal computer.

NOTE: Disconnecting the scan tool MB991958 is the
reverse of the connecting sequence, making sure that the
ignition switch is at the "LOCK" (OFF) position.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

IGNITION SWITCH

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CHASSIS ELECTRICAL

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SYMPTOM CHART

M1543007200674

SYMPTOM

INSPECTION
PROCEDURE NO.

REFERENC
E PAGE

Ignition key hole
illumination light
system

When the driver's side door is opened, the
ignition key hole illumination light does not
illuminate.

1

P.54-11

The ignition key hole illumination light does not
go out.

2

P.54-21

The ignition key hole illumination light does not
go out when the ignition key is turned to the
"ON" position (However, it goes out after 15
seconds.)

3

P.54-25

Ignition key reminder
tone alarm

The ignition key reminder tone alarm does not
stop sounding when the ignition key is turned
to the "ON" position (The tone alarm stops
sounding by closing the driver's door.)

3

P.54-25

The ignition key reminder tone alarm does not
stop sounding by removing the ignition key.
(The tone alarm stops sounding by closing the
driver's door.)

4

P.54-29

The ignition key reminder tone alarm does not
sound when the ignition key is inserted and the
driver's door is opened. (The ignition key is
turned to "OFF".)

5

P.54-33