Mitsubishi Montero Sport (2004+). Manual — part 496

COMPASS AND TEMPERATURE DISPLAY DIAGNOSIS

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INTERIOR

52A-29

INSPECTION PROCEDURE 4: There is a Discrepancy Between the Actual Outside Temperature and
Displayed Temperature or an Error Displays (CS, OS).

.

CIRCUIT OPERATION
Refer to Outside Temperature Meter and Electronic
Compass Circuit (Refer to

P.52A-21

.)

• A thermistor is used for the thermo sensor. The

resistance value fluctuate according to ambient
temperature. The inside rear view mirror (with
compass and temperature display) calculates
outside temperature according to the changes in
this resistance value, and displays it on the inside
rear view mirror (with compass and temperature
display).

.

TECHNICAL DESCRIPTION (COMMENT)
The outside thermo sensor, inside rear view mirror
(with compass and temperature display) harness, or
connector may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of the outside thermo sensor

• Malfunction of the inside rear view mirror (with

compass and temperature display)

• Damaged harness or connector

DIAGNOSIS

STEP 1. Check the outside thermo sensor internal
resistance.

(1) Remove the outside thermo sensor

P.52A-43

.

(2) Check the internal resistance of the outside thermo sensor

are at the standard values at temperature of 20

°C (68°F)

and 40

°C (104°F).

Standard value:

Approximately 1,200

Ω [at 20°C (68°F)]

Approximately 500

Ω [at 40 °C (104°F)]

Q: Does the out side thermo sensor resistance meet

standard values above?
YES : Go to Step 3.
NO : Go to Step 2.

STEP 2. Check harness connector A-22 at the outside
thermo sensor for loose, corroded or damaged terminals,
or terminals pushed back in the connector.

Q: Is harness connector A-22 in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Then go to Step 6.

AC003251

THERMOMETER

DRYER

SENSOR

AB

AC2019836

1

2

CONNECTOR: A-22

AB

COMPONENT
SIDE

A-22 (BR)

COMPASS AND TEMPERATURE DISPLAY DIAGNOSIS

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INTERIOR

52A-30

STEP 3. Measure the outside thermo sensor voltage.

(1) Remove the inside rear view mirror (with compass and

temperature display) (Refer to

P.52A-43

.)

(2) Measure from the rear side of the harness connector E-59

with the connector connected.

(3) Measure voltage between terminal number 2 and number 7

when the outside thermo sensor is at the following
temperatures.

• Voltage should be approximately 2.90 volts [when 0°C

(32

°F) is displayed]

• Voltage should be approximately 1.86 volts [when 20°C

(68

°F) is displayed]

• Voltage should be approximately 1.10 volts [when 40°C

(104

°F) is displayed]

Q: Does the voltage between terminal number 2 and

number 7 meet the above values?
YES : Replace the inside rear view mirror (with compass

and temperature display). Then go to Step 6.

NO : Go to Step 4.

STEP 4. Check harness connector E-59 at the inside rear
view mirror (with compass and temperature display)
connector for loose, corroded or damaged terminals, or
terminals pushed back in the connector.

Q: Is harness connector E-59 in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Then go to Step 6.

AC003252 AC

E-59 HARNESS CONNECTOR:
COMPONENT SIDE

AC201078

4

5

3

1

6

7

2

CONNECTOR: E-59

COMPONENT
SIDE

AB

E-59

COMPASS AND TEMPERATURE DISPLAY DIAGNOSIS

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INTERIOR

52A-31

STEP 5. Check the harness wires between outside thermo
sensor connector A-22 (terminal No.1 and 2) and inside
rear view mirror (with compass and temperature display)
connector E-59 (terminal No.2 and 7).

NOTE: After inspecting intermediate connector C-01, inspect
the wire. If intermediate connector C-01 is damage, repair or
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion

P.00E-2

.

Q: Is the harness wires between outside thermo sensor

connector A-22 (terminal No.1 and 2) and inside rear
view mirror (with compass and temperature display)
connector E-59 (terminal No.2 and 7) in good condition?
YES : Go to Step 6.
NO : Repair them. Then go to Step 6.

AC2019836

1

2

CONNECTOR: A-22

AB

COMPONENT
SIDE

A-22 (BR)

AC201078

4

5

3

1

6

7

2

CONNECTOR: E-59

COMPONENT
SIDE

AB

E-59

AC201079

22

9 10

20

19

6 7 8

21

17

1516

5

14

1213

3

2

4

18

11

1

CONNECTOR: C-01

AB

C-01

ON-VEHICLE SERVICE

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INTERIOR

52A-32

STEP 6. Retest the system.
Q: Is there any discrepancy between the actual outside

temperature and displayed temperature, or is any error
(CS, OS) displayed?
YES : This procedure is complete. (If no malfunctions are

found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-7

.)

NO : There is no action to be taken.

ON-VEHICLE SERVICE

PROCEDURES FOR CALIBRATING THE
COMPASS

M1524011500055

1. Press the "COMP" button. The visual display is now in

compass mode and the vehicle's directional heading (N, NE,
SE, S, SW, W and NW) will be displayed.
Pressing the "COMP" button a second time will turn off the
visual display.

2. If the display reads "C," there may be a strong magnetic field

interfering with the compass. In this case, the compass may
need calibration.

3. Drive the vehicle in a circle at about 5 mph (8km/h) or less

until the display reads a direction.
You can also calibrate the compass by driving your vehicle
on your everyday routine and after several turns the
compass will become calibrated and will display a direction.

AC003253

AC003254

AC003255