Mitsubishi Montero (2004+). Manual — part 567

REAR WINDOW DEFOGGER

TSB Revision

CHASSIS ELECTRICAL

54A-237

REAR WINDOW DEFOGGER

ON-VEHICLE SERVICE

PRINTED-HEATER LINES CHECK

M1543001800139

1. Run engine at 2,000 r/min. Check heater element with

battery at full.

2. Turn "ON "rear window defogger switch. Measure heater

element voltage with circuit tester at rear window glass
centre A. Condition is good if it indicates about 6 V.

3. If 12 V is indicated at A, there is a break in the negative

terminals from A. Move test bar slowly to negative terminal
to detect where voltage changes suddenly (0V).

4. If 0 V is indicated at A, there is a break in the positive

terminals from A. Defect where the voltage changes
suddenly (12 volts, battery positive voltage) in the same
method described above.

REAR WINDOW DEFOGGER SWITCH

REMOVAL AND INSTALLATION

M1543006200217

<Vehicles with manual A/C>

Refer to GROUP 55A, Heater Control Assembly and
Blower Switch Assembly

P.55A-120

.

<Vehicles with auto A/C>

Refer to GROUP 55B, A/C Control Panel, A/C Con-
trol Unit

P.55B-142

.

INSPECTION

M1543019501835

REAR WINDOW DEFOGGER SWITCH CHECK

ACX00813

NORMAL CHARACTERSTIC CURVE

ABNORMAL CHARACTERSTIC CURVE

VOLTAGE

A (CENTER POINT)

APPROXIMATELY
6 V

NEGATIVE
TERMINAL

PRINTED
HEATER
LINE

POSITIVE
TERMINAL

NEGATIVE
TERMINAL

PRINTED
HEATER
LINE

POSITIVE
TERMINAL

OPENCIRCUIT
POINT

VOLTAGE

AC

SWITCH POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

OFF

11

− 12

Open circuit

ON

11

− 12

Less than 2 ohms

1

2

3

4

5

6

7

8

9

10 11 12

ACX02300

AC

HEATER CONTROL ASSEMBLY
CONNECTORT

RV METER

TSB Revision

CHASSIS ELECTRICAL

54A-238

REAR WINOW DEFOGGER RELAY CONTINUITY
CHECK

RV METER

EQUIPMENT DIAGNOSIS

INTRODUCTION TO RV METER

M1543009901003

The RV meter has the following function for the fail-
ure diagnosis service, and is used for the system
check of units such as the main body and the sensor.
By virtue of this service function, the cause of failure
can be conjectured.

FAILURE DIAGNOSIS SERVICE
FUNCTION

The RV meter is equipped with the following func-
tions for the failure diagnosis service.

.

BATTERY
VOLTAGE

TESTER
CONNECTION

SPECIFIED
CONDITION

Not applied

2

− 5

Open circuit

• Connect terminal 1 to the

positive battery terminal

• Connect terminal 3 to the

negative battery terminal

2

− 5

Less than 2
ohms

ACX01474

1

2

3

4
5

1

2

3

5

ACX01962

DEFOGGER
RELAY

AB

FUNCTION

CONTENTS

Service
function

Automatic check mode

Performs communication check and connection check in
succession.

Diagnosis mode

Performs version check of each unit, vehicle signal check
and communication and connection check

History mode

Displays the number of errors as the result of
communication and connection checks

Monitor check
mode

Display check mode

Checks whether the screen display function.

Geomagnetic sensor
check mode

Checks whether the geomagnetism sensor are working
normally.

RV METER

TSB Revision

CHASSIS ELECTRICAL

54A-239

Start service function
1. Press the "ADJ" switch with the ignition switch at "LOCK"

(OFF) position, and while keeping on pressing, turn the
ignition switch to the "ACC" or "ON." position. When the ADJ
switch is pressed continuously for more than five seconds,
the service function is activated at the same time with the
reception signal (pip sound) and the first menu screen of the
service mode is displayed.

2. When respective function switches are pressed on this

screen, the screen is switched as follows.

• When the function switch 1 [AUTO] is pressed, the screen

is switched to the automatic check mode.

• When the function switch 2 [DIAG] is pressed, the screen is

switched to the diagnosis mode.

• When the function switch 3 [HISTORY] is pressed, the

screen is switched to the history mode.

• When the "ADJ" switch [NEXT] is pressed, the screen is

switched to the service mode second menu screen.

• When the "DISP" switch [NEXT] is pressed, the service

mode is terminated.

3. When the function switch 1 is pressed on this screen, the

screen is switched as follows.

• When the function switch 1 [MONITOR] is pressed, the

screen is switched to the monitor check mode.

• When the "ADJ" switch [BACK] is pressed, the screen is

switched to the service mode first menu screen.

• When the "DISP" switch [END] is pressed, the service

mode is terminated.

.

Automatic check mode
1. Press the "ADJ" switch with the ignition switch at "LOCK"

(OFF) position, and while keeping on pressing, turn the
ignition switch to the "ACC" or "ON." position. When the"
ADJ" switch is pressed continuously for more than five
seconds, the service function is activated at the same time
with the reception signal (pip sound) and the first menu
screen of the service mode is displayed.

2. Press the function switch 1 [AUTO] on the service mode first

menu screen. The screen is switched to the automatic check
mode. Follow the on-screen instructions to turn the ignition
switch to "ON." position.

3. Press the ignition switch is turned "ON." The communication

and connection checks are performed. The checks will be
finished with 10 seconds.

Service mode

ACX01984

AUTO

DIAG.

HISTORY

NEXT

END

AE

SERVICE MODE FIRST MENU SCREEN

Service mode

ACX01985

MONITOR

BACK

END

AB

SERVICE MODE SECOND MENU SCREEN

Service mode

ACX01984

AUTO

DIAG.

HISTORY

NEXT

END

AE

SERVICE MODE FIRST MENU SCREEN

Checking the system connection.

ACX01986

Please Wait!

AB

RV METER

TSB Revision

CHASSIS ELECTRICAL

54A-240

4. After the communication check and connection check are

completed, the check results are displayed. Air-conditioner
input (Auto, manual or less are displayed.) Fuel gauge input
(OK, full or disconnected are displayed.)
NOTE:

.

Auto: Automatic A/C
Manual or less: No-automatic A/C circuit or automatic A/C

circuit open

OK: Some fuel in tank.
Full or Disconnected: Full tank of fuel or fuel level circuit

open.

5. Press the function switch 1 [NEXT]. The unit status is

displayed.
NOTE:

.

Monitor: RV meter
A/C: Automatic A/C

6. Press the function switch 1 [NEXT] on this screen. The inner

status of the monitor is displayed.
NOTE:

.

Amb.: Outside air temperature sensor
Geomag.: Geomagneic sensor
Eng. ECU: Powertrain control module.
SWS: Simplified Wiring System
M-BUS: Communications for A/C-ECU

7. Press the function switch 1 [NEXT] on this screen. The

versions of monitor and the automatic air-conditioner (if
equipment) are displayed. In the case of air-conditioner-less
or manual air-conditioner, the version is not displayed.
NOTE:

.

M: Mitsubishi Electric
D: Denso

DISPLAY EXAMPLE

CONTENTS OR CONDITION

OK

System check OK

NG

Some kind of error exists, further
diagnosis required

E1

Communication error

E2

Open circuit or disconnected

DISPLAY EXAMPLE

CONTENTS OR CONDITION

OK

System check OK

NG

Some kind of error exists, further
diagnosis required

E1

Communication error

E2

Open circuit or disconnected

Connection status

A/C : Manual or less
Fuel : Full or Disconnected

ACX01987

NEXT

AB

Unit status

Monitor
A/C

: NG
: E2

ACX01988

NEXT

AB

Monitor status

Amb. Temp. : NG
Geomag. X : OK

Y : OK

Eng. ECU : OK
SWS
M-BUS

: OK
: OK

ACX01989

NEXT

AB

Version

Monitor : M 99/SEP. Ver. xx.x
A/C

: D 99/SEP. Ver. xx.x

NEXT

AC000764AB