Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 1072
1A–10 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart “E” Blower Motor Does Not Run At High Position
Step
Action
Yes
No
1
Is resistor OK?
Go to Step 2
Replace
2
Is fan control lever (Fan Switch) OK?
Open circuit
between Chassis
side connector
terminal No.
C41-3 and No.
I23-5.
Replace control
lever assembly.
Chart “F” Blower Motor Does Not Stop In The “OFF” Position
Step
Action
Yes
No
1
Is the fan control lever (Fan Switch) OK?
Short circuit
between chassis
side connector
terminal
No. C38-2 and
No. C41-2,No. C4
1-3 and
No. I23-5,
No. C41-6 and
No. I23-4,
No. C41-4 and
No. I23-3 or
No. C41-1 and
No. I23-2
Replace control
lever assembly.
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A–11
Individual Inspection
Blower Motor
1. Disconnect the blower motor (C-38) connector from
the blower motor.
2. Connect the battery positive terminal to the No. 1
terminal of the blower motor and the negative to the
No. 2.
3. Be sure to check to see if the blower motor operates
correctly.
873RS005
Resistor
1. Disconnect the resistor (C-41) connector.
2. Check for continuity and resistance between the
terminals of the resistor.
840RS001
Fan Control Lever (Fan Switch)
1. Check for continuity between the terminals of the fan
switch.
D08RW058
Heater Relay
1. Disconnect the heater relay (X-1).
D
When removing the connector for relay, unfasten
the tank lock of the connector by using a
screwdriver, then pull the relay (1) out.
825RS001
1A–12 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
2. Check for continuity between the heater relay (X-1)
terminals.
825RS179
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–13
Heater Unit
Heater Unit and Associated Parts
840R100001
Legend
(1) Instrument Panel Assembly
(2) Cross Beam Assembly
(3) Instrument Panel Bracket
(4) Ventilation Lower Duct
(5) Rear Heater Duct
(6) Evaporator Assembly (A/C only)
(7) Edge Protector Knee Bolster
(8) Knee Bolster Bracket
(9) Duct
(10) Heater Unit Assembly
(11) Heater Hose
(12) Resistor Connector
Removal
1. Disconnect the battery ground cable.
2. Drain the engine coolant.
3. Discharge and recover refrigerant (with air
conditioning).
D
Refer to Refrigerant Recovery in this section.
4. Remove the Instrument panel assembly.
D
Refer to Instrument Panel Assembly in Body and
Accessories section.
5. Remove instrument panel bracket.
D
Refer to Cross Beam Assembly in Body and
Accessories section.
6. Cross Beam Assembly.
D
Refer to Cross Beam Assembly in Body and
Accessories section.
7. Disconnect resistor connector.
8. Remove knee bolster bracket.
9. Remove duct.
10. Remove evaporator assembly (A/C only).
D
Refer to Evaporator Assembly in this section.
11. Remove ventilation lower duct.
12. Remove rear heater duct.
D
Remove foot rest, carpet and 3 clips.
13. Remove heater unit assembly.
D
Disconnect heater hoses at heater unit.
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