Opel Frontera UBS. Manual - part 1875

AIR CONDITIONING  1B–101

Chart 1: In Car Sensor

NO

Replace the sensor.

NO

Disconnection of the harness.

Failure on the automatic heater/air

conditioner control unit.

YES

Disconnect the in car sensor connector (I-34).

YES

Is the sensor performance normal? (refer to

the later section on "Check Up")

Are conduction provided between the
following connector terminals on chassis
harness side?:
No.3 and 

No.1 .

No.4 and 

No.11 .

I-33

I-34

I-33

I-34

I-33

I-34

1

11

2

12

3

13

4

14

5

15

6

16

7

17

8

18

9

19

10

20

0.3 BR/B

0.5 B/L

11

1

In car Sensor

Auto A/C Control Unit

(In car Sensor)

(Sensor GND)

4

3

I-33

I-34

1 2

4

3

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1B–102 AIR CONDITIONING

Chart 2: Ambient Sensor

NO

Replace the ambient sensor.

NO

Failure on the harness.

Connect the ambient sensor connector.

Replace the automatic heater/air conditioner

control unit.

YES

Disconnect the Ambient sensor connector 

(C-86).

YES

Is performance of the ambient sensor

normal? (Refer to the later section on

"Check Up".)

Is resistance between the following
connectors normal?
No.2 and 

No.11 .

I-33

I-33

I-33

C-86

H-24

1

11

2

12

3

13

4

14

5

15

6

16

7

17

8

18

9

19

10

20

0.3 LG/B

0.3 B/L

11

2

Ambient Sensor

Auto A/C Control Unit 

(Ambient Sensor)

(Sensor GND)

I-33

0.3 LG/B

0.3 B/L

H-24

8

H-24

9

C-86

1

C-86

2

17 18

16

15

14

7 8

6

5

12 13

11

10

9

4

1

3

2

5

6

7

8

15

16

17

18

14

2

3

4

1

10

11

12

13

9

1

2

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AIR CONDITIONING  1B–103

Chart 3: Sun Sensor

NO

Replace the sun sensor.

NO

Replace the harness.

Replace the automatic heater/air conditioner

control unit.

YES

Disconnect the sun sensor connector (I-35).

YES

Is performance of the sun sensor normal?

(Refer to the later section on "Check Up".)

Is the conduction provided between the
following chassis harness side connector
terminals?
No.3 and 

No.1 .

No.11 and 

No.2 .

I-35

I-33

I-35

I-33

0.3 LG/W

0.3 B/L

11

3

Sun Sensor

Auto A/C Control Unit 

(Sun Sensor)

(Sensor GND)

I-33

I-35

1

I-35

2

I-33

I-35

2 1

1

11

2

12

3

13

4

14

5

15

6

16

7

17

8

18

9

19

10

20

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1B–104 AIR CONDITIONING

Inspection of the Intake Actuator System 

B-19

I-32

B-36

H-26

H-13

I-49

I-33

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

1

11

2

12

3

13

4

14

5

15

6

16

7

17

8

18

9

19

10

20

10 11 12 13 14 15

1 2 3 4 5

17 18 19 20

6 7 8 9

16

9 8 7 6

20 19 18 17 16

5

14

15

4

13

3

12

2

11

1

10

B-36

1

2

3

4

M

FL-1 80A

MAIN

11

0.5 L/O

STARTER RELAY

I-33

11

12

13

14

0.3 L/R

0.5 L/W

0.3 B/L

0.3 L/Y

Intake Actuator

Auto A/C Control Unit

BATT.

(Intake Actuator)

GND(COM)

CIRC

FRESH

MIX

I-32

2

1

4

3

0.5 BR

0.5 BR

3.0 L/R

C-20 10A

A/C

I-49

3

H-13

10

I-49

4

I-49

5

I-49

6

I-49

1

I-49

2

H-26

14

B-19

1

3 4 5 6

2

3
6

2
5

1
4

1

2

3

4

5

6

Type of the

trouble

Control failure.

Chart B

Does not work at all.

Chart A

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