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.