Mitsubishi Montero (1991+). Manual — part 152

With lever set at OUTSIDE position, outside air is allowed to enter

and/or pass through heater. With lever set at INSIDE position, air is

recirculated inside passenger compartment.

BLOWER SWITCH

The blower can be operated at different fan speeds to

regulate amount of air forced through vehicle. Fan speed will increase

as switch is turned or moved right.

AIR CONTROL INDICATION SYSTEM

This system consists of indication lights built into

instrument cluster and 4 switches connected to various control levers.

An indication light glows when heater blower is on. Lights also

indicate choice of outlets and whether air source is inside or outside

vehicle. In addition, temperature of air directed from outlets is

indicated for each air outlet by light colors of green (cool air) and

orange (warm air).

ADJUSTMENTS

HEATER (TEMPERATURE) CONTROL VALVE

Place control lever to indicated position. See TEMPERATURE

CONTROL CABLE ADJUSTMENT table. See Fig. 3. Connect cable to heater

control valve and/or air damper lever according to table. Secure cable

sleeve using clips. With engine running, check for coolant leaks and

check operation of heater control valve. If heater control valve does

not operate properly, adjust by moving cable sleeve forward or

backward at retaining clip.

TEMPERATURE CONTROL CABLE ADJUSTMENT TABLE

Application Control Lever Water Valve

Position Lever Position

Montero . . . . . Far Left . . . ... Toward cable

Pickup & Ram-50 . . . Far Left . . (2) Away from cable

(2) - Disconnect link between air damper lever and water valve

lever. Close water valve. Close air damper. Reconnect link.

Attach cable to clip.

Fig. 3: Adjusting Temperature Control Cable (Typical)

Courtesy of Mitsubishi Motor Sales of America.

INSIDE/OUTSIDE AIR SELECTION CABLE

Move control lever to INSIDE position. Connect cable to

damper lever with outside air intake to heater closed. Apply

multipurpose grease to rotating portions of sliding lever. Check for

proper damper operation by moving control lever. To adjust, press air

control lever toward cable and move outer wire at retaining clip. See

Fig. 4.

Fig. 4: Adjusting Air Selection Cable (Typical)

Courtesy of Mitsubishi Motor Sales of America.

MODE SELECTOR LEVER

Place selection lever in DEF position, and remove cable clip.

Ensure defroster door is fully open. Secure cable sleeve using clips.

Move lever to other positions to check for correct operation. Adjust

cable, if necessary, by moving sleeve forward or backward at retaining

clip.

TROUBLE SHOOTING

BLOWER MOTOR INOPERATIVE

Blown blower fuse. Blower motor improperly grounded.

Defective switch or faulty blower motor wiring connections. Foreign

object in fan.

INSUFFICIENT HEAT

Incorrect thermostat in cooling system. Improperly adjusted

temperature control cable. Clogged heater core fins. Faulty heater

control valve.

NO TEMPERATURE REGULATION

Clogged or stuck heater control valve. Incorrect installation

of heater control valve control cable. Incorrect adjustment of heater

control valve link.

NO VENTILATION

Incorrect adjustment of change-over dampers. Duct connection

loose.

TESTING

BLOWER MOTOR SWITCH TEST

Blower motor switch can be tested using an ohmmeter. Insert

test leads into appropriate connector terminals, and check continuity.

See BLOWER SWITCH CONTINUITY table. See Fig. 5 or 6.

BLOWER MOTOR SWITCH CONTINUITY TABLE

Continuity Between

Switch Position Terminal Nos.

Montero

Low . . . . . . . . 1-2 & 1-7

Medium 1 . . . . . . ... 2-4 & 4-7

Medium 2 . . . . . . ... 2-5 & 5-7

High . . . . . . . ... 2-6 & 6-7

1992 Montero

Low . . . . . . . . 1-8 & 3-5

Medium 1 . . . . . . ... 1-8 & 5-6

Medium 2 . . . . . .. 1-4, 1-8 & 2-5

High . . . . . . .. 1-4, 1-8 & 5-7

Pickup & Ram-50

Low . . . . . . ... 1-2, 2-6 & 7-8

Medium 1 . . . . . .. 1-3, 3-6 & 7-8

Medium 2 . . . . . .. 1-4, 4-6 & 7-8

High . . . . . . .. 1-5, 5-6 & 7-8

Fig. 5: Blower Motor Switch Connector Terminal ID (Pickup & Ram-50)

Courtesy of Mitsubishi Motor Sales of America.

Fig. 6: Blower Motor Switch Connector Terminal ID (Montero)

Courtesy of Mitsubishi Motor Sales of America.

BLOWER MOTOR TEST

1) Turn ignition on. Check fuses. If fuses are bad, check

wiring harness for short circuits. If fuses are okay, check voltage

between heater relay and ground circuit. If voltage does not exist at

heater relay, check for broken wire between fuse block and heater

relay.

2) If voltage exists at heater relay, check relay, and

replace if necessary. See BLOWER MOTOR RELAY TEST under TESTING. If

relay is okay, disconnect blower motor connector. Set heater switch to

either LO, MED or HI setting.

3) Check voltage between harness side of connector and

vehicle ground. Battery voltage should be present. If battery voltage

is present, go to next step. If battery voltage is not present, check

continuity between resistor terminals. See BLOWER MOTOR RESISTOR TEST

under TESTING. If continuity is not present, replace resistor.