Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1668
1-58 HEATING AND AIR CONDITIONING
Fan switch and A/C switch
Check for continuity between switch connector terminals.
Connector
No.
FAN SW
FAN
SW
A/C
SW
SW Position
1 2 3 4 5 6 1 2 1 2 3
OFF
1
2
3
4
OFF
ON
A/C
Blower
motor
Thermo switch
(1) Remove the thermosensor from the evaporator.
(2) A/C is "ON".
(3) Set the atmospheric temperature of the thermosensor to the
following condition.
(4) Confirm that the thermo switch relay is activated when the
condition is met.
Ambient Temperature
Thermo switch relay
Below 3.5
±
0.5
°
C (38.3
±
0.9
°
F)
OFF
Above 5.0
±
0.5
°
C (41.0
±
0.9
°
F)
ON
HEATING AND AIR CONDITIONING 1-59
Pressure switch
Check for continuity between pressure switch side connector
terminals.
1. Disconnect the connector and check for continuity between
pressure switch side connector terminals (1).
2 Reconnect the connector to activate the A/C switch, and
check to see if there is continuity between the chassis side
connector terminals (3) and (4) and the fan operates.
IT RELAY
Heater and thermo switch relay.
Check for continuity between relay side connector terminals.
IT RELAY:
Rated voltage/Coil resistance
12V/Approx. 90
Ω
Minimum operating voltage : 7V at 25
°
C (77
°
F)
There is continuity between the relay side connector terminals
(5) and (1) when the relay connects between terminals (2) and
(4).
CM RELAY
CM RELAY
Rated voltage/Coil resistance
12V/Approx. 130
Ω
Minimum operating voltage : 7V at 25
°
C (77
°
F)
There is continuity between the relay side connector terminals
(2) and (1) when the relay connects between terminals (4) and
(3).
1-60 HEATING AND AIR CONDITIONING
CONDENSER FAN MOTOR
Removal
Preparation: Battery ground cable
1. Radiator grille
2. Condenser fan assembly
•
Disconnect the fan motor connector and
remove the 4 fixing bolts.
3. Cover
•
Remove the 4 fixing screws.
4. Shroud
•
Remove the 3 fixing nuts.
•
Loosen the condenser fixing nut and
remove the fan motor connector from
bracket.
5. Fan
•
Remove the fan fixing nut.
6. Condenser fan motor
•
Disconnect the condenser connectors.
Installation
To install,follow the removal steps in the reverse order, noting
the following point.
1. Route the fan motor harness in its previous position, and fix
it securely with clip and bracket.
HEATING AIR CONDITIONING 1-61
TROUBLESHOOTING
1. Trouble of Fan Control System
1-A Blower motor would not rotate totally.
1-B Blower motor does not rotate in certain position.
1-C Blower motor does no stop at "OFF" position.
2. Trouble of Air-Conditioning System
2-A Magnetic clutch would not engage.
2-B Refrigeration system defective.
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