Opel Frontera UBS. Manual - part 932

1B–122 AIR CONDITIONING

Chart A: Magnet Clutch Does Not Work

NO

Replace the fuse.

NO

Replace the failed relay.

NO

Replace the electronic thermostat.

YES

Failure on the magnet clutch.

NO

The harness is disconnected.

NO

Failure on the power supply system.

YES

Is fuse C-20 (10A) normal?

Are relays normal?

YES

YES

Is the electronic thermostat normal?

YES

Turn the A/C (air conditioner) switch on.

Is the battery voltage present between the
chassis harness side connector terminal
No.1 

and the ground?

E-27

NO

Is the battery voltage present between the
chassis harness side connector terminal
No.1 

and the ground.

C-25

YES

NO

Failure on the pressure switch or refrigerant is

insufficient.

NO

The harness is disconnected.

Is the battery voltage present between the
chassis side relay terminal No.1 
and the ground?

X-5

Are the pressure switch side connector
terminals No.1 

and No.2 

conducted?

C-25

C-25

YES

YES

Failure on the automatic heater/air

conditioner control unit.

NO

The harness is disconnected.

Is conduction provided between the
chassis harness side connecter terminals
No.1 and 

No.4 ?

X-5

E-27

YES

Are the chassis harness connector
terminals No.14 

and No.3 

?

X-5

I-32

AIR CONDITIONING  1B–123

Inspection of the Air Conditioner Room Temperature Setup System

• Conflicts Between the Set Temperature and Actual Room Temperature

NO

Replace the failed sensor.

NO

NO

Failure on the automatic heater/air

conditioner control unit.

YES

YES

YES

Is the in car sensor intaking the room
air? (Refer to the later section on "Check
Up".)

Is the air mix link properly attached?
(Make sure that selecting FH or FC using
the lever respectively sets the mix door
to the full hot or full cool.)

Are the interior temperature sensor and
the outside air temperature sensor
functioning normally?

Failure on the in car sensor.

Failure on the air mix link or the actuator.

1B–124 AIR CONDITIONING

INDIVIDUAL INSPECTION

In Car Sensor

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

2. Measure resistance between the in car sensor

side terminal No.3 

and No.4 

.

Sun Sensor

1. Disconnect the sun sensor connector (I-35).

2. Measure the current value on the sun sensor

when placed it approximately 15 cm away from
60W incandescent lamp.

Ambient Sensor

1. Disconnect the connector (C-86) on the ambient

sensor.

2. Measure resistance between the ambient

sensor side terminals.

I-34

I-34

Temperature on the Sensor
Temperature Detector(¡C)

Sensor Resistance

Value(k

‰

)

20       25       30

AUTO

4 3 2 1

-20

0

5

10

15

20

25

30

-10

0

10 20 30 40

17.09

9.93

3.75

2.24

6.0

1.6

30.69

865RX007

‰

0

10

0

-10

-20

30

40

20

5

10

15

20

25

30

Temperature on the Sensor
Temperature Detector(¡C)

Sensor Resistance

Value(k

‰

)

17.09

30.69

9.93

6.0

3.75

2.24

1.6

C01RX012

—

Testing rod

1

2

A

Current

value

40 A or more

+

1

2

2

1

D06RY00001

AIR CONDITIONING  1B–125

Power Transistor

1. Remove the power transistor connector (I-47)

from the evaporator assembly.

2. Check the conduction between the power

transistor side terminals.

MAX HI Relay

1. Remove the MAX HI relay connector (B-64) from

the blower assembly.

2. Check the conduction between the MAX HI relay

side terminals.

In Car Sensor

1. Turn on the ignition switch (the engine is

started). Start the air conditioner in "Full Auto".

2. Make sure that the in car sensor suctions

cigarette smokes and such.

3. Dismount the in car sensor from the automatic

heater/air conditioner control unit. Connect (+)
end and (-) end of the battery to the aspirator
motor side terminals No.1 

and No.2

, respectively, then

check if the motor runs normally.

I-34

I-34

20       25       30

AUTO

4 3 2 1

C01RW020

4

3

3

4

1

2

2

1

No continuity between terminals (2) and (4).

Continuity between terminal (2) and (4) when battery 

voltage is applied between (1) and (3).

C01RY00003

1

2

3

Terminal
No.

Conduction

Conducted (50‰ maximum)

Conducted (100‰ maximum)

Conducted (220‰ maximum)

Not conducted

Not conducted

1

−

2

3

Testing
rod

−

−

−

−

＋

＋

＋

＋

＋

1

2

3

C01RY00002