Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1669

1-62  HEATING AIR CONDITIONING

1-A

BLOWER MOTOR WOULD NOT ROTATE TOTALLY

(Refer to "WIRING HARNESS TERMINAL POSITIONS" in this section.)

Replace

YES

•

Is heater fuse (20A) OK?

•

Is heater relay OK?

YES

•

Is resistor OK?

YES

•

Is fan control knob (Fan switch) OK?

YES

YES

•

Check to see if battery voltage is present at chassis

side connector terminal No.

A

 - 

1

 (No.

A

 - 

2

; RHD)

•

Turn the ignition switch "ON" (Engine is running)

•

Fan control knob (Fan switch) "ON"

•

Is blower motor OK?

YES

Poor ground or open circuit either between chassis
side connector terminal No.

A

 - 

2

 (No.

A

 - 

1

; RHD)

and No.

B

 - 

6

 or No.

D

 - 

12

 and body ground

NO

Replace

NO

Replace

NO

NO

Replace control lever assembly

Replace

NO

NO

Open circuit between heater
fuse (20A) and No.

A

 - 

1

 (No.

A

- 

2

; RHD)

HEATING AIR CONDITIONING  1-63

1-B

BLOWER MOTOR DOES NOT ROTATE IN CERTAIN POSITION

(Refer to "WIRING HARNESS TERMINAL POSITIONS" in this section.)

A

1: (Low)

Blower motor does not

B

2: (Medium Low) Position

run at

C

3: (Medium Hi)

D

4: (High)

* Checking is performed only when in the malfunction

mode.

•

Is resistor OK?

YES

•

Is fan control knob (Fan switch) OK?

YES

A

 Condition:

•

Open circuit between chassis side connector terminal

No.

B

 - 

22

 or No.

D

 - 

15

B

 Condition :

•

Open circuit between chassis side connector terminal

No.

B

 - 

3

 or No.

D

 - 

13

C

 Condition:

•

Open circuit between chassis side connector terminal

No.

B

 - 

5

 or No.

D

 - 

14

D

 Condition:

•

Open circuit between chassis side connector terminal

No. 

B

 - 

4

 or No.

D

 - 

10

Replace

NO

NO

Replace control lever assembly

1-64  HEATING AIR CONDITIONING

1-C

BLOWER MOTOR DOES NOT STOP AT "OFF" POSITION

(Refer to "WIRING HARNESS TERMINAL POSITIONS" in this section.)

•

Is fan control knob (Fan switch) OK?

YES

Short circuit between chassis side connector terminal

•

No. 

A

 - 

2

 (No.

A

 - 

1

; RHD) and No.

B

 - 

6

(or)

•

No.

B

 - 

4

 or No.

D

 - 

10

(or)

•

No.

B

 - 

5

 or No.

D

 - 

14

(or)

•

No.

B

 - 

3

 or No.

D

 - 

13

(or)

•

No.

B

 - 

22

 or No.

D

 - 

15

NO

Replace control lever assembly

HEATING AIR CONDITIONING  1-65

2-A

MAGNETIC CLUTCH WOULD NOT ENGAGE

(Refer to "WIRING HARNESS TERMINAL POSITIONS" in this section.)

Magnetic clutch deffective

NO

•

Are A/C (10A) and heater (20A) fuses OK?

•

Stop the engine

YES

•

Are heater and thermo switch relays OK?

YES

•

Is pressure switch (Dual pressure switch) OK?

YES

YES

Check the A/C related harness and repair it as necessary

•

Is thermo switch OK?

•

Are A/C switch and fan control knob (Fan switch)

YES

Replace

NO

Replace

NO

NO

Switch defective or insufficient
refrigerant

Replace

NO

•

Check to see if continuity between chassis side

connector terminal 

D

 - 

12

and ground

•

Check to see if battery voltage is present at

magnetic clutch chassis side connector terminal

•

Turn the ignition switch "ON" (Engine is running)

•

A/C switch and fan switch "ON"

YES

YES

Replace

NO

Poor ground or open circuit

NO