Opel Frontera UE. Manual - part 38

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

—

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–125

Chart B: Mode Actuator Control Failure

Step

Action

Value(s)

Yes

No

1 

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

Dose the mode actuator work normally through
manual operation?

—

Go to Step 13

Go to Step 12

12 

Replace the sensor.
Is the action complete?

—

Verify repair

—

13 

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

—

Verify repair

—

1A–126

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Inspection of the Fan Motor System

D08RX227

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

1A–127

Chart A: Fan Does Not Rotate At All

Condition

Possible cause

Correction

The fan dose not rotate at all

—

Refer to Chart A

The fan dose not rotate in the MAX–
HI mode

—

Refer to Chart B

The fan dose not rotate in any mode
other than MAX–HI

—

Refer to Chart C

The fan dose not stop

—

Refer to Chart D

Step

Action

Value(s)

Yes

No

1 

Are the fuse No.F–4 and No.F–5 normal?

—

Go to Step 2

Replace the 

fuse

2 

Are the relay No.X–6 and No.B–25 normal?

—

Go to Step 3

Replace the 

relay

3 

Turn on the ignition switch (the engine is run).
Is the battery voltage applied between the harness
side connector terminal No.B5–2 and ground?

—

Go to Step 5

Go to Step 4

4 

Repair an open circuit between terminal No.B5–2 and
No.F–4 fuse.
Is the action complete?

—

Go to Step 3

—

5 

Is there continuity between the harness side
connector terminal No.B5–1 and ground (No.B–8)?

—

Go to Step 7

Go to Step 6

6 

Repair an open circuit between terminal No.B5–1 and
ground.
Is the action complete?

—

7 

Is the battery voltage applied between the harness
side connector terminal No.B5–1 and No.B5–2?

—

Go to Step 8

Go to Step 9

8 

Replace the blower motor.
Is the action complete?

—

Verify repair

—

9 

Refer to chart B and C.
Is the action complete?

—

Verify repair

—