Opel Frontera UE. Manual - part 33

 

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Opel Frontera UE. Manual - part 33

 

 

1A–104

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Troubleshooting

Troubleshooting, Its Overview and Procedures

The automatic heater and air conditioner equips with
the “Self-Diagnosis Function" to check its major
components.
This function makes access to the sensors, actuators
and blower fan motor system easier when checking
them up and, when a failed part is located, this function
restores its original performance.
When implementing the troubleshooting, this
self-diagnosis function narrows the range to be

searched at the first step, then check relevant parts one
by one according to the “Checking Procedures by Failed
Location".  As for a location this function is
unappreciable, the system accurately determines
characteristics of a given trouble and checks relevant
parts according to the “Checking Procedures by Failed
Location".
The following illustrates basic troubleshooting flow.

Basic Troubleshooting Flow

F01RX009

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–105

Auto Air Conditioner Control Unit Power Supply Diagnosis

This check is required because a trouble on the auto
amplifier (control unit) power supply circuit or grounding
circuit prevents accurate troubleshooting.

D08RX284

Condition

Possible cause

Correction

Power source does not supply to auto
air conditioner control unit.

—

Refer to Chart A

1A–106

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart “A": Check of Auto Amplifier Power Supply System

Step

Action

Value(s)

Yes

No

1 

Is the fuse C–5 normal?

—

Go to Step 2

Replace the 

fuse

2 

Is the fuse F–5 normal?

—

Go to Step 3

Replace the 

fuse

3 

Disconnect the auto A/C control unit connector I–20.   
Is the battery voltage applied between the harness
side connector terminal No.I20–8 and the ground?

Approx. 12V

Go to Step 5

Go to Step 4

4 

Repair an open circuit between the fuse C–5 and
terminal No.I20–8.   
Is the action complete?

—

Go to Step 4

—

5 

Is there continuity between the harness side
connector terminal No.I20–16 and the ground?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.I20–16
and the ground No.B–8.
Is the action complete?

—

Go to Step 5

—

7 

Is there continuity between the harness side
connector terminal No.I20–9 and the ground?

—

Go to Step 9

Go to Step 8

8 

Repair an open circuit between terminal No.I20–9 and
the ground No.B–8.
Is the action complete?

—

Go to Step 7

—

9 

Turn the lighting switch on.
Is the battery voltage applied between the harness
side connector terminal No.I20–10 and the ground?

Approx. 12V

Go to Step 11

Go to Step 10

10 

Repair an open circuit between the lighting switch and
terminal No.I20–10.
Is the action complete?

—

Go to Step 9

—

11 

Turn the starter switch on.
Is the battery voltage applied between the harness
side connector terminal No.I20–7 and the ground?

Approx. 12V

—

Go to Step 12

12 

Repair an open circuit between the fuse F–5 and
terminal No.I20–7.
Is the action complete?

—

Verify repair

—

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–107

Performance and Movement checklist for Automatic Air Conditioner Related
Parts

Start the engine, and when the engine coolant reached
50

°

C check performance and movement of the related

parts according the following checklist.

Performance Check Using the Manual Switch

No.

Item

Checking Approach

Acceptance criteria

Condition

Operation

1

Blowing
temperature (check
movement of air
mix door)

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.

2

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.

3

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.

4

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.

5

Compressor

Set the temperature to
18.0

°

C (FC).  (Outside

air temperature is 0

°

C

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.

 

 

 

 

 

 

 

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