Opel Frontera UE. Manual - part 638

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–109

Troubleshooting With Self-Diagnosis Function

Overview of Self-Diagnosis Function

The self-diagnosis is implemented in 3 steps for each
target.  For detail of check procedure contained in each
step, refer to the relevant section of “Check Procedure
by Failed Location" listed in the Self-Diagnosis
Operation Procedure.

For turning on the self-diagnosis function and switching
of the check step, refer to the flow chart given below.
You can reset the self-diagnosis function by turning the
ignition switch off or turning the DEF switch on for 5
seconds.

Self-Diagnosis Operation Procedure

Step

Action

Value(s)

Yes

No

1 

1. Set the IG to the OFF position.

2. Apply 60W bulb light to the solar radiation sensor.

3. Set the temperature setting lever on the automatic

heater/air conditioner panel to the center position
(25

°

C).

4. Set the fan switch on the same panel to the Auto

position.

Is the action complete?

—

Go to Step 2

—

2 

While holding both the Auto switch and the DEF
switch on the automatic heater/air conditioner panel,
turn the IG off and then on.
Is the current trouble diagnosing function turned on
approximately in 10 seconds?

—

Go to Step 3

—

3 

Does the A/C LED flash every 0.5 second interval?

—

Go to Step 4

Refer to *1.

4 

Press the A/C switch once.
Does the A/C LED flash every 0.5 second interval?

—

Go to Step 5

Refer to *2.

5 

Refer to *3 chart “Check of Output Equipment".
Does each output equipment function normally
according to operation of the temperature setting
level?

—

Go to Step 6

Repair or 

replace the 

output 

equipment or 

repair the 

harness

6 

Press the DEF switch for 5 seconds consecutively or
turn on and off the IG.
Is the action complete?

—

Go to Step 1

—

1A–110

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

*

1

Displaying the Current Trouble Diagnosing Table

Start the engine while holding down both the Auto
switch and the DEF switch on the control panel, and the
table will appear in approximately 10 seconds to the
indicator lamp (LED) of the air conditioning switch.
Result of the diagnosis along the following 9 items will
be shown one by one in 0.5 second interval irrespective
of presence or absence of a trouble for a given item.

When the display 9 items is completed, it is repeated
with 3 seconds of interval in between. A failed item is
indicated by flashing of the LED that is repeated 3 times
within 0.5 seconds. If a trouble is indicated, you can
locate the failed section by knowing when in the total
sequence it has been displayed.

F01RX010

Item for Current Trouble Diagnosis

F01RY00008

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–111

As shown above, display of result along nine items is
repeated with 3-second interval in between.
Note 1: When checking the solar radiation sensor, apply
sufficient light using a 60W bulb. Otherwise, it can be
diagnosed as failed.
Note 2: If the temperature setting lever is set on both

ends (one set to 18

°

C, blue scale =  Full cool and the

other to 31

°

C, red scale = Full hot), they can be

diagnosed as failed.
Note 3: Likewise, the fan switch can be diagnosed as
failed if set on both ends.

*

2

Displaying the Past Trouble Diagnosing Table

The past trouble diagnosis displays only the items on
which trouble has recurred 16 times in the past.
If you press the air conditioning switch once while the
current trouble diagnosis is taking place, display of the
past trouble diagnosis will appear on the indicator lamp
(LED) of the air conditioning switch.
Results of the diagnosis along the following five items

are displayed one by one in 0.5 second interval
irrespective of presence or absence of a trouble. A failed
item is indicated by flashing of the LED that is repeated
3 times within 0.5 seconds. You can locate the failed
section by counting in what sequence it has been
displayed.

F01RX011

F01RY00007

1A–112

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

*

3

Check of Output Equipment

F01RX015