Opel Frontera UE. Manual - part 1251

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–125

Inspection of the Mode Actuator System

D08R100130

Condition

Possible cause

Correction

Does not work at all

—

Refer to Chart A

Control failure

—

Refer to Chart B

SECTION

1A–126

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?

—

Go to Step 7

—

9 

Replace the mode actuator.
  

—

Verify repair

—

SECTION

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–127

Chart B: Mode Actuator Control Failure

Step

Action

Value(s)

Yes

No

1 

Turn on the ignition switch (the engine is run).
Does the mode actuator fully stroke when the defrost
mode and the vent mode are selected?

—

Go to Step 3

Go to Step 2

2 

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

—

Go to Step 1

—

3 

Is there continuity between the harness side
connector terminal No.C48–9 and No.I44–11?

—

Go to Step 5

Go to Step 4

4 

Repair an open circuit between terminal No.C48–9
and No.I44–11.
Is the action complete?

—

Go to Step 3

—

5 

Is there continuity between the harness side
connector terminal No.C48–3 and No.I44–10?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.C48–3
and No.I44–10.
Is the action complete?

—

Go to Step 5

—

7 

Is there continuity between harness side connector
terminal No.C48–4 and No.I44–8?

—

Go to Step 9

Go to Step 8

8 

Repair an open circuit between terminal No.C48–4
and No.I44–8.
Is the action complete?

—

Go to Step 7

—

9 

Is sum of the voltage between the following harness
side connector terminal approximately 5V?  Voltage
between No.I44–8 and No.I44–10 plus voltage
between No.I44–8 and No.I44–11

5V

Go to Step 11

Go to Step 10

10 

Replace the actuator.
Is the action complete?

—

Verify repair

—

11 

Does the mode actuator work normally through
manual operation?

—

Go to Step 13

Go to Step 12

12 

Replace the sensor.
Is the action complete?

—

Go to Step 11

—

13 

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

—

Verify repair

—

SECTION

1A–128

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Inspection of the Fan Motor System

D08R100131

SECTION