Opel Frontera UE. Manual - part 641

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–121

Chart A: Does Not work At All

Step

Action

Value(s)

Yes

No

1 

1. Turn on the ignition switch (the engine is run).

2. Disconnect the mix actuator connector (C–45).

3. Short-circuit the chassis harness side connector

terminal No.C45–2 and No.C45–7.

4. Using the temperature control lever, select FH for

the temperature.

Is the battery voltage applied on a regular interval
basis between the harness side connector terminal
No.C45–8 (-) and No.C45–6 (+)?

—

Go to Step 3

Go to Step 2

2 

Replace the auto air conditioner control unit.
 

 

—

Varify  repair

—

3 

Using the temperature control lever, select FC for the
temperature.
Is the battery voltage applied on a regular interval
basis between the harness side connector terminal
No.C45–8 (+) and No.C45–6 (-)?

—

Go to Step 5

Go to Step 4

4 

Replace the auto air conditioner control unit.
  

—

Verify repair

—

5 

Is there continuity between the harness side
connector terminal No.I20–6 and No.C45–8?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.I20–6 and
No.C45–8.
Is the action complete?

—

Go to Step 5

—

7 

Is there continuity between the harness side
connector terminal No.I20–5 and No.C45–6?

—

Go to Step 9

Go to Step 8

8 

Repair an open circuit between terminal No.I20–5 and
No.C45–6.
Is the action complete?

—

Verify repair

—

9 

Replace the mix actuator.
Is the action complete?

—

Verify repair

—

1A–122

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart B: Mix Actuator Control Failure

Step

Action

Value(s)

Yes

No

1 

Turn the ignition switch (the engine is run).
Dose the mix actuator fully stroke when FH and FC of
the temperature control lever?

—

Go to Step 3

Go to Step 2

2 

Repair or replace the air mix door or the link unit.
Is the action complete?

—

Varify repair

—

3 

Is there continuity between the harness side
connector terminal No.C45–2 and No.I44–11?

—

Go to Step 5

Go to Step 4

4 

Repair an open circuit between terminal No.C45–2
and No.I44–11.
Is the action complete?

—

Go to Step 3

—

5 

Is there continuity between harness side connector
terminal No.C45–7 and No.I44–5?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.C45–7
and No.I44–5.
Is the action complete?

—

Go to Step 5

—

7 

Is there continuity between the harness side
connector terminal No.C45–3 and No.I44–15?

—

Go to Step 9

Go to Step 8

8 

Repair an open circuit between terminal No.C45–3
and No.I44–15.
Is the action complete?

—

Go to Step 7

—

9 

Is sum of the voltage between the following chassis
harness side connector terminals approximately 5V?
No.I44–15 and No.I52–5, No.I44–5 and No.I44–11

—

Go to Step 11

Go to Step 10

10 

Replace the actuator.
Is the action complete?

—

Verify repair

—

11 

Replace the auto air conditioner control unit.
Is the action complete?

—

Verify repair

—

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–123

Inspection of the Mode Actuator System

D08RX228

Condition

Possible cause

Correction

Does not work at all

—

Refer to Chart A

Control failure

—

Refer to Chart B

1A–124

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart A: Does Not Work At All

Step

Action

Value(s)

Yes

No

1 

1. Turn on the ignition switch (the engine is run). 

2. Disconnect the mode actuator connector (C–48) 

3. Select VENT pressing the mode actuator. 

Is the battery voltage provided on a regular interval
between the harness side connector terminal
No.C48–1 (+) and No.C48–5 (-)?

—

Go to Step 3

Go to Step 2

2 

Replace the auto air conditioner control unit.
Is the action complete?

—

Varify repair

—

3 

Turn on the DEF mode switch.
Is the battery voltage provided on a regular interval
between the chassis side connector terminal No.C48–
5 (+) and No.C48–1 (-)?

—

Go to Step 5

Go to Step 4

4 

Replace the auto air conditioner control unit.
 

 

—

Varify  repair

—

5 

Is there continuity between the harness side
connector terminal No.C48–1 and No.I20–4?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.C48–1
and No.I20–4.
Is the action complete?

—

Go to Step 5

—

7 

Is there continuity between the harness side
connector terminal No.C48–5 and No.I20–3?

—

Go to Step 9

Go to Step 8

8 

Repair an open circuit between terminal No.C48–5
and No.I20–3.
Is the action complete?

—

Verify repair

—

9 

Replace the mode actuator.
  

—

Verify repair

—