Opel Frontera UBS. Manual - part 927

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

D08RY00176

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

D08RY00177

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

D08RY00178

AIR CONDITIONING  1B–105

Chart A: Does Not Work At All

NO

Failure on the power supply circuit.

NO

Failure on the actuator.

NO

The harness is disconnected.

NO

Replace the automatic heater/air conditioner

control unit.

YES

YES

YES

YES

Turn on the ignition switch (the engine is

started).

Switch between the fresh air intake and the

interior air circulation.

Failure on the intake link unit (intake door

lock).

Is the battery voltage present between the
chassis harness side connector terminal
No.3 

and the ground?

I-49

Is the battery voltage present between
the chassis harness side connector
terminal No.4 

and the ground?

I-49

Is the battery voltage present between
the chassis harness side connector
terminal No.11 

and the ground?

I-32

During the above switch operations, did
the voltage between the chassis harness
side connector terminal No.11 

and

the ground go below 0.5V?

I-32