Opel Frontera UBS. Service manual — part 1873
AIR CONDITIONING 1B–93
Check of Auto Amplifier (Automatic air conditioner control unit) Power Supply System
• This check is required because a trouble on the auto amplifier (control unit) power supply circuit or
grounding circuit prevents accurate troubleshooting.
Check of auto amplifier
power supply circuit and
grounding circuit.
Chart A
B-18
FL-1 Main
80A
0.5G/R
16
10
7
8
I-32
I-32
C-16
10A
0.3R/W
0.5BR
Backup
Power supply (12V)
Unit ground
Automatic heater/air conditioner control unit
B-18
B-36
H-14
C-20
10A A/C
Relay:
Heater and air
conditioner
0.5B
1.25B
2B
Lighting switch
Lighting switch
H-14
1
H-26
9
H-26
14
H-27
20
H-16
14
2
1
4
3
B-36
1
2
3
4
H-16
H-26
H-27
I-32
1
2
1
2
10 9 8 7 6
5 4 3 2 1
2221201918
1514131211
17
16
1 2 3 4 5
1112131415
6 7 8 9 10
1819202122
16
17
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
20
12
19
11
18
10
17
9
16
8
15
7
14
6
13
5
1 2
3 4
4 3
2 1
12 11 10 9 8 7 6 5
13
14
15
16
17
18
19
20
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
D08RY00175
1B–94 AIR CONDITIONING
Chart "A" : Check of Auto Amplifier Power Supply System
NO
Harness disconnection or improper grounding.
NO
Harness disconnection or improper grounding.
NO
Harness disconnection or trouble on lighting
switch.
NO
Harness disconnection or improper grounding.
Turn off ignition switch.
Power supply system is free of
trouble.
YES
YES
YES
YES
Is battery voltage present between chassis
harness connector terminal No.7
and ground?
I-32
Is battery voltage present between
chassis harness connector No.8
and ground?
I-32
Are chassis harness connector No.16
and body ground
conducted?
B-18
I-32
Turn on ignition switch (engine is started).
Turn on lighting switch.
Is battery voltage present between chassis
harness connector No.10
and
ground?
I-32
AIR CONDITIONING 1B–95
Performance and Movement checklist for Automatic Air Conditioner Related Parts
Start the engine, and when the engine coolant reached 60°C check performance and movement of the
related parts according the following checklist.
1. Performance Check Using the Manual Switch
Checking Approach
No.
Item
Acceptance criteria
Condition
Operation
Blowing
temperature
(check movement
of air mix door)
Airflow volume
(check movement
of the mode door)
Set temperature to
25.0°C.
(1) Turn the fan knob
off.
(2) Turn the fan knob
from LOW to HI.
(1) The fan shall be stopped, thus
stopping air blow, too.
(2) Airflow volume shall change
from LOW to HI.
Blowing
temperature
(check movement
of the mode door)
Set temperature to
25.0°C.
Set the fan knob to HI.
Press the mode switch
to change the blow port
mode sequentially from
the VENT through BI-
LEVEL, FOOT up to
DEF.
LED corresponding to each mode
shall be turned on and the blow
port mode shall be switched
smoothly.
The
interior/outside air
switching mode
(check movement
of intake door)
Set temperature to
25.0°C.
Turn the LED off using
the interior/outside air
switch (this introduces
the outside air intake
mode). Then, the set
fan knob to HI and
press the
interior/outside switch
to turn on the LED.
The LED indication shall be
switched from OFF to ON
accompanying a change in air
blowing sound.
Compressor
Set the temperature to
FC. (Outside air
temperature is 0C or
above and interior
temperature at ordinary
temperature.)
Press the "OFF" switch.
(1) Press the Auto
switch.
(2) Press the Air
Conditioner switch.
(1) As the fan knob is set to the
Auto position, the A/C switch
LED shall come on and the
compressor shall be turned on.
(2) As the A/C LED comes off, the
compressor shall be turned off.
Auto switch must be
turned on
(FAN-AUTO
MODE-AUTO)
(1) Select FC for the
setup temperature.
(2) Select FH for the
setup temperature.
→
Then, select the
MAX Control.
(1) Cold air shall be blown out.
(2) Hot air shall be blown out.
1
2
3
4
5
1B–96 AIR CONDITIONING
Checking Approach
No.
Item
Acceptance criteria
Condition
Operation
Change the
temperature gradually
starting with 20°C up to
30°C.
The following phenomena shall be
recognized.
• Temperature of blown air: Cold
air is changed to hot air.
• Change in the air flow volume.
• The blow port mode LED
indication changes in the
following sequence:
Select FH for the
temperature.
Cold air shall be blown out.
The following LEDs shall come on.
• Blow port mode :
• Fan speed: Max Hi
Select FC for the
temperature.
The LED shall come on.
Cold air shall be blown out.
The following LEDs shall come on:
• Blow port mode :
• Intake mode
• Fan speed : MAX Hi
• A/C
1
Full Auto function
FAN KNOB “AUTO”
MODE SW “AUTO”
2. Check of Full Auto Function
(VENT)
(FOOT)
(BI-LEVEL)
F01RX003
F01RX002
F01RX004
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