Opel Frontera UBS. Service manual — part 928

1B–106 AIR CONDITIONING

Chart B: Failure on the Intake Control

NO

The harness is disconnected.

NO

Failure on the automatic heater/air

conditioner control unit.

NO

Failure on the automatic heater/air

conditioner control unit.

YES

YES

YES

Turn on the ignition switch (the engine is

started).

Disconnect the intake actuator connector

(I-49).

Failure on the intake actuator.

Is the intake actuator stopped?

Is conduction provided between the
following chassis harness side connector
terminals?
No.5 and

No.11 .

No.6 and

No.12 .

No.1 and

No.13 .

No.2 and

No.14 .

I-33

I-49

I-33

I-49

I-33

I-49

I-33

I-49

Is voltage (approximately 5V) present
between the following?
No.12

and the ground.

No.13

and the ground.

No.14

and the ground.

I-33

I-33

I-33

AIR CONDITIONING 1B–107

Inspection of the Mix Actuator System

H-67

I-32

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

I-45

I-32

M

6

6

0.3 V/W

I-33

11

3

0.5 B/L

5

7

0.3 V

15

2

0.3 V/G

5

23

20

6

16

24

8

0.3 V/R

I-45

3 KW

Heat

(Potentio Meter)

Cool

Cool

Heat

Mix Actuator

Auto A/C Control Unit

（

HEAT TO COOL

）

＋

Cool side

＋

Heat side

（

COOL TO HEAT

）

（

GND

）

(Mix Potentio Meter)

（＋

5 V

）

4

5

8

7

6

0.3 V/W

0.3 B/L

0.3 V

0.3 V/G

H-67

H-67

H-67

H-67

H-67

0.3 V/R

1

2

5

6

3

4

8

9

7

1 2

3

8

4 5 6 7

1

2

3

8

4

5

6

7

Type of the

trouble

Control failure.

Chart B

Does not work at all.

Chart A

D08RY00179

1B–108 AIR CONDITIONING

Chart A: Does Not work At All

NO

The harness is disconnected.

NO

Replace the automatic heater/air

conditioner control unit.

NO

Replace the automatic heater/air

conditioner control unit.

YES

YES

YES

Turn on the ignition switch (the engine is

started).

Disconnect the mix actuator connector

.

Short-circuit he chassis harness side
connector terminal No.3

and No.7

.

I-45

I-45

I-45

Using the temperature control lever,

select FC for the temperature.

Using the temperature control lever,

select FC for the temperature.

Failure on the actuator.

Is the battery voltage present on a regular
interval basis between the chassis
harness side connector terminals No.6

(+) and No.5

(-)?

I-32

I-32

Is conduction provided between the
following chassis harness side connector
terminals?
No.6 and

No.6 .

No.5 and

No.8 .

I-45

I-32

I-45

I-32

Is the battery voltage present on a regular
interval basis between the chassis
harness side connector terminals No.6

(-) and No.5

(+)?

I-32

I-32

AIR CONDITIONING 1B–109

Chart B: Mix Actuator Control Failure

NO

Replace the actuator.

NO

The harness is disconnected.

NO

NO

Mix actuator control failure due to the

failed sensor.

YES

YES

YES

YES

Turn on the ignition switch (the engine is

started).

Replace the automatic heater/air conditioner

control unit.

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

No.11 .

No.7 and

No.5 .

No.2 and

No.15 .

I-33

I-45

I-33

I-45

I-33

I-45

Is sum of the voltages between the
following chassis harness side connector
terminals approximately 5V?
Voltage between No.15

and No.5

plus voltage between No.5

and No.11

.

I-33

I-33

I-33

I-33

Does the self-diagnosis function (the
current trouble display) indicate failure
on the mix actuator potentiometer?

Is full stroke of the air mix door available
when you selected FH or FC using the
temperature control lever?

Failure on the air mix door or the link

unit.