Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1081

1A–46 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart “A” Condenser Fan Does Not Run 

Step

Action

Yes

No

1

Are 30A fuse OK?

Go to Step 2

Replace

2

Is relay (X-11) OK?

Go to Step 3

Replace

3

Is pressure switch OK?

Go to Step 4

Switch defective

or insufficient

refrigerant.

4

Is air conditioning switch OK?

Go to Step 5

Replace

5

Is fan motor OK?

Go to Step 6

Replace

6

1. Disconnect condenser fan relay (X-11).
2. Check to see if battery voltage is present at the chassis side

relay terminal NO. X11-2

Is there a battery voltage?

Go to Step 7

Open circuit

between

Condenser Fan

fuse (30A) and

No.X11-2.

7

1. Reconnect condenser fan relay (X-11).
2. Air conditioning switch “ON”.
3. Check to see if battery voltage is present at chassis side

connector terminal No.C9-3.

Is there a battery voltage?

Go to Step 8

Open circuit

between I-24-1

and C9-3.

8

1. Air conditioning switch “OFF”.
2. Check to see if continuity between chassis side relay terminal

No.X11-5 and the chassis side connector terminal No.C9-4.

Is there a continuity?

Go to Step 9

Open circuit.

9

Check to see if continuity between chassis side connector
terminal No. C24-1 and chassis side relay terminal No.X11-1.

Is there a continuity?

Poor ground or

open circuit

between chassis

side connector

terminal

No.X11-3 (or

No.C24-2) and

body ground

(No.C16).

Open circuit.

Chart “B” Condenser Fan Does Not Stop 

Step

Action

Yes

No

1

1. Air conditioning switch “OFF”.

Does condenser fan stop?

Triple pressure

switch defective.

Condenser fan

relay (X11)

defective.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–47

Air Source Select Lever Diagnosis

D08RY00549

Condition

Possible cause

Correction

FRESH mode inoperative

—

Refer to Chart A

RECIRC mode inoperative

—

Refer to Chart B

1A–48 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Chart “A”: FRESH Mode Inoperative 

Step

Action

Value(s)

Yes

No

1

Is the fuse EB-7 normal?

—

Go to Step 2

Replace the

fuse

2

Is C-16 grounded securely?

—

Go to Step 3

Ground it

securely

3

Remove the intake actuator relay.

Is the relay normal?

—

Go to Step 4

Replace the

relay

4

Is there continuity between the intake actuator relay
harness side connector C-42 terminal 4/5 and the
ground C-16?

—

Go to Step 5

Repair an

open circuit

5

1. Set the HVAC control bezel to DEF/FOOT or DEF

position.

2. Turn the starter switch on and keep the engine

running.

Is the battery voltage applied between the intake
actuator harness side connector C-42 terminal 2 and
the ground?

Approx. 12V

Go to Step 10

 Go to Step 6

6

Disconnect the HVAC control bezel.

Is the battery voltage applied between the bezel
harness side connector I-33 terminal 6 and the ground?

Approx. 12V

Go to Step 8

Go to Step 7

7

Repair an open circuit between the fuse EB-7 and the
connector I-33 terminal 6.

Is the action complete?

—

Go to Step 6

—

8

Is there continuity between the HVAC control bezel
side connector terminal 5 and 6?

—

Go to Step 9

Repair or

replace the

bezel

9

Is there continuity between the harness side connector
I-33 terminal 5 and C-42 terminal 2?

—

Go to Step 10

Repair an

open circuit

10

Disconnect the intake actuator connector C-39.

Is the battery voltage applied between the harness side
connector C-39 terminal 3 and the ground?

Approx. 12V

Go to Step 11

Repair an

open circuit

11

Is there continuity between the harness side connector
C-39 terminal 2 and C-42 terminal 1

Approx. 12V

Go to Step 12

Repair an

open circuit

12

Is there continuity between the harness side connector
C–39 terminal 4 and 5?

—

Go to Step 13

Repair an

open circuit

13

Replace the intake actuator.

Is the action complete?

—

Verify repair

—

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–49

Chart “B”: RECIRC Mode Inoperative 

Step

Action

Value(s)

Yes

No

1

Is the fuse EB-7 normal?

—

Go to Step 2

Replace the

fuse

2

Is C-16 grounded securely?

—

Go to Step 3

Ground it

securely

3

Is the Intake actuator relay normal?

—

Go to Step 4

Replace the

relay

4

1. Disconnect the Intake actuator connector C-39
2. Connect the battery positive terminal to the Intake

actuator side connector terminal No.3 and the
battery negative terminal to terminal No.6.

3. Connect the switch side connector terminal No.4

and No.5.

Does the actuator work normally?

—

Go to Step 5

Replace the

actuator

5

Turn the Starter switch on.

Is the battery voltage applied to the harness side
connector C-39 terminal 3?

Approx.12V

Go to Step 6

Repair an

open circuit

6

Is there continuity between harness side connector
C–42 terminal No.5 and the ground?

—

Go to Step 7

Repair an

open circuit

7

1. Remove the HVAC control bezel.
2. Move the air source select lever to REC position.

Is there continuity between the control bezel side
terminal No.3 and 8?

—

Go to Step 8

Repair or

replace the

control bezel

8

Is there continuity between harness side connector
C-39 terminal 6 and connector I-33 terminal 3?

—

Go to Step 9

Repair an

open circuit

9

Repair an open circuit between connector I-33 terminal
8 and connector C-42 terminal 3.

Is the action complete?

—

Verify repair

—