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
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