Mitsubishi Montero (2002-2004). Manual — part 512

RV METER

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CHASSIS ELECTRICAL

54A-219

STEP 3. Check the A/C-ECU.

CAUTION

To Prevent to damage to scan toll MB991502, always turn
the ignition switch to "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Read the A/C diagnostic trouble code.
Q: Is A/C diagnostic trouble code 13 or 14 set?

YES : Go to Step 4.
NO : Go to Step 5.

STEP 4. Check the outside air temperature sensor.
(1) Remove the radiator grille. (Refer to

P.36-4

.)

(2) Remove the outside air temperature sensor.
(3) Measure the resistance between the outside air

temperature sensor terminals at two or more temperature
conditions.

Q: Does the resistance value exist within the characteristic

graph?
YES : There is no action to be taken.
NO : Replace the outside air temperature sensor.

ACX01539

16-pin

MB991502

AI

ACX2146 AB

RV METER

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CHASSIS ELECTRICAL

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STEP 5. Check outside air temperature sensor connector
A-29 and RV meter connector D-08 <vehicles with
automatic air conditioning system> or RV meter connector
D-07 <vehicles with manual air conditioning system> for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are outside air temperature sensor connector A-29 and

RV meter connector D-08 <vehicles with automatic air
conditioning system> or RV meter connector D-07
<vehicles with manual air conditioning system> in good
condition?
YES : Go to Step 6 <vehicles with automatic air conditioning

system> or go to Step 8 <vehicles with manual air
conditioning system>.

NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.52A-7

.

AC204166

CONNECTOR : A-29

AP

A-29(B)

A-29(B)

1

2

HARNESS
SIDE

AC204188

D-08(B)

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15

AC204188

CONNECTORS: D-07, D-08

BT

HARNESS SIDE

HARNESS SIDE

D-07(B)

22

23

30

31

25

26

33

34

32

24

28

3635

27

29

21

D-07(B)

D-08(B)

RV METER

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CHASSIS ELECTRICAL

54A-221

STEP 6. Check the RV meter and A/C-ECU <vehicles with
automatic air conditioning system> circuit by
backprobing.
(1) Do not disconnect RV meter connector D-08.
(2) Ignition switch: "ACC" position.
(3) Measure the voltage (waveform) between the terminal 9

and the ground using an oscilloscope by backprobing.

(4) Measure the voltage (waveform) between terminal 10 and

ground by backprobing.

(5) Measure the voltage (waveform) between terminal 19 and

ground by backprobing.

Q: Is the measured voltage Hi = 4 to 5 volts and Lo = 0 to 1

volt?
YES : Replace the RV meter display.
NO : Go to Step 7.

AC204738

20

19

18

17

7

6

15

14

4

3

11 12 13

5

1

9 10

2

16

8

AC204738 DV

HARNESS SIDE: D-08

AC204738 DW

HARNESS SIDE: D-08

20

19

18

17

7

6

15

14

4

3

11 12 13

5

1

9 10

2

16

8

AC204738 DX

HARNESS SIDE: D-08

20

19

18

17

7

6

15

14

4

3

11 12 13

5

1

9 10

2

16

8

RV METER

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CHASSIS ELECTRICAL

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STEP 7. Check the harness wires between RV meter
connector D-08 (terminal 9 and 10 and 19) and A/C-ECU
connector D-23 (terminal 16 and 17 and 6).
Q: Are harness wires between RV meter connector D-08

(terminal 9 and 10 and 19) and A/C-ECU connector D-23
(terminal 16 and 17 and 6) in good condition?
YES : Go to Step 9.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.52A-18

.

AC204188

D-08(B)

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15

AC204188

CONNECTORS: D-08, D-23

BU

HARNESS SIDE

HARNESS SIDE

D-08(B)

D-23(B)

D-23(B)

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15