turn signal ISUZU AXIOM 2002 Service Repair Manual

1A±40
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Condenser Assembly
Condenser Assembly and Associated Parts
875R200022
Legend
(1) Refrigerant Line
(2) Pressure Switch Connector
(3) Condenser & Receiver Tank Assembly
(4) Condenser Air Guide
(5) Front Bumper Assembly(6) Engine Hood Front End W/Engine Hood Lock
& Bumper Stay
(7) Front Center Bumper Retainer
(8) Front Side Bumper Retainer (RH)
(9) Head Light (R/LH)
(10) Front Side Turn Signal Light (R/LH)
(11) Horn (R/LH)
Removal
1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant.

Refer to
Refrigerant Recovery in this section.
3. Remove front bumper assembly.

Refer to the
Front Bumper in Body Structure
section.
4. Remove front center bumper retainer.
5. Remove front side bumper retainer (RH).
6. Remove condenser air guide.
7. Remove engine hood front end with engine hood lock
& bumper stay.

Apply setting mark to the engine hood lock fixing
position before removing it.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±41
8. Remove horn (R/LH).
9. Remove front side turn signal light (R/LH).
10. Remove head light (R/LH).
11. Disconnect pressure switch, ambient sensor and
condenser fan connector.
12. Disconnect refrigerant line.

When removing the line connector, the connecting
part should immediately be plugged or capped to
prevent foreign matter from being mixed into the
line.
13. Remove condenser & receiver tank assembly.

Handle with care to prevent damaging the
condenser or radiator fin.
Installation
1. Install condenser & reciver tank assembly.

If installing a new condenser, be sure to add 30cc
(1.0 fl. oz.) of new compressor oil to a new one.

Tighten the condenser fixing bolts to the specified
torque.
Torque: 6 Nwm (52 lb in)
2. Connect refrigerant line.

Tighten the inlet line connector fixing bolt to the
specified torque.
Torque: 15 Nwm (11 lb ft)

Tighten the outlet line connector fixing bolt to the
specified torque.
Torque: 6 Nwm (52 lb in)

O-rings cannot be reused. Always replace with new
ones.

Be sure to apply new compressor oil to the O-rings
when connecting the refrigerant line.
3. Connect pressure switch, ambient sensor and
condenser fan connector.
4. Install head light (R/LH).
5. Install front side turn signal light (R/LH).
6. Install horn (R/LH).
7. Install engine hood front end with engine hood lock &
bumper stay.

Align the setting mark when installing.
8. Install condenser air guide.
9. Install front side bumper retainer (RH).
10. Install front center bumper retainer.
11. Install front bumper assembly.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±43
Receiver / Drier
Receiver / Drier and Associated Parts
875R200019
Legend
(1) Front Side Turn Signal Light (LH)
(2) Refrigerant Line
(3) Head Light (LH)
(4) Front Bumper Assembly
(5) Receiver / Drier
(6) Pressure Switch Connector
Removal
1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant.

Refer to
Refrigerant Recovery in this section.
3. Remove front bumper assembly.

Refer to the
Front Bumper in Body Structure
section.
4. Remove front side turn signal light (LH).
5. Remove head light (LH).
6. Disconnect pressure switch connector.
7. Disconnect refrigerant line.

When removing the line connected part, the
connecting part should immediately be plugged or
capped to prevent foreign matter from being mixed
into the line.
8. Remove receiver/drier.

Loosen the bolt, then, using care not to touch or
bend the refrigerant line, carefully pull out the
receiver/drier.
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
1. If installing a new receiver/drier, be sure to add 30cc
(1.0 fl. oz.) of new compressor oil to a new one.
2. Put the receiver/drier in the bracket and connect with
the refrigerant line. Check that no excessive force is
imposed on the line. Fasten the bracket bolt to the
receiver/drier.
3. Tighten the refrigerant line to the specified torque.
Torque: 6 Nwm (52 lb in)
4. O-rings cannot be reused. Always replace with new
ones.
5. Be sure to apply new compressor oil to the O-rings
when connecting the refrigerant line.

1A±44
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Pressure Switch
Pressure Switch and Associated Parts
875R200021
Legend
(1) Pressure Switch Connector
(2) Front Side Turn Signal Light (LH)
(3) Head Light (LH)
(4) Front Bumper Assembly
(5) Pressure Switch
Removal
1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant.

Refer to
ªRefrigerant Recovery in this section.
3. Remove the front bumper assembly.

Refer to the
Front Bumper in Body Structure
section.
4. Remove the front side turn signal light (LH).
5. Remove the head light (LH).
6. Disconnect pressure switch connector.
7. Disconnect pressure switch.

When removing the switch connected part, the
connecting part should immediately be plugged or
capped to prevent foreign matter from being mixed
into the line.
Installation
To install, follow the removal steps in the reverse order,
noting the following point:
1. O-ring cannot be reused. Always replace with a new
one.
2. Be sure to apply new compressor oil to the O-ring
when connecting pressure switch.
3. Tighten the pressure switch to the specified torque.
Torque: 13 Nwm (113 lb in)

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±49
Refrigerant Line
Refrigerant Line and Associated Parts
852R200007
Legend
(1) Clip and Clamp
(2) Liquid Line (High-Pressure Pipe)
(3) Discharge Line (High-Pressure Hose)
(4) Condenser Air Guide(5) Front Bumper Assembly
(6) Front Side Turn Signal Light (LH)
(7) Head Light (LH)
(8) Suction Line (Low-Pressure Pipe)
Removal
1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant.

Refer to
Refrigerant Recovery in this section.
3. Remove the front bumper assembly.

Refer to the
Front Bumper in Body Structure
section.
4. Remove the condenser air guide.5. Remove the front side turn signal light (LH).
6. Remove the head light (LH).
7. Remove clip and clamp.
8. Disconnect liquid line (High-pressure pipe).
9. Disconnect suction line (Low-pressure pipe) using a
back-up wrench.
10. Disconnect suction line (Low-pressure hose) using a
back-up wrench.

1A±78
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Sun Sensor
It is a photodiode used for detecting quantity of solar
radiation. This sensor converts the offset signal
generated by changes in the interior temperature (which
results from fluctuations in solar radiation) into
photoelectric current to enter into the automatic air
conditioner control unit.
This sensor is provided at top of the center cluster upper.
865R200002
Legend
(1) Sun Sensor
(2) Center Cluster Upper
Power Transistor
Receiving base current from the automatic air conditioner
control unit, the power transistor implements stage-less
speed change of the blower fan motor. This transistor is
provided on the evaporator.
874R200009
Legend
(1) Evaporator Assembly
(2) Power Transistor
Max Hi Relay
This relay turned on or off by the signal from the automatic
air conditioner control unit. As the Max Hi relay is turned
on, supply voltage is directly fed to the blower fan motor to
select the Max Hi mode.
873RY00005
Legend
(1) Blower Unit
(2) Max High Relay

1A±80
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Movement of Mix Actuator
Position of the air mix door is determined by the controller
on the automatic air conditioner control unit.
As the heat or cool side of the controller is grounded, the
transistor on the driver is activated and, thus, the motor
rotation is turned on. The sliding contact connected to the
motor sends the position detection signal from the
potentiometer to the automatic air conditioner control
unit. As the set temperature and interior temperature are
balanced, the controller returns to the neutral and the
motor rotation is stopped.
C-43
Rotation
direction
Remarks
(+) side(-) sidedirection
86ClockwiseFull heat side
68Counter
clockwiseFull cool side
C01RX005
Movement of Mode Actuator
As target position of the mode door is decided on the
controller of the control unit, the control unit reads the
position detection signal from the actuator to select the
clockwise or counter clockwise motor rotation direction.
Grounding the controller VENT or DEF side after the
direction selection activates the transistor on the driver,
thus turning on the motor rotation. Accompanying the
motor rotation, the sliding contact rotates, too. When the
target position is reached, the controller on the control
unit returns to the neutral and the motor stops.
Conduction pin
Rotation
direction
Remarks
(+) side(-) sidedirection
51ClockwiseVENT to DEF
direction
15Counter
clockwiseDEF to VENT
direction
C01RX017

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±83
Interior Temperature Control
When the temperature control switch is set to a specific
temperature, a signal is sent to the A/C control unit. Other
signals are sent to the control unit from the various
sensors. This data is analyzed by the control unit which
creates a composite data signal that is compared with the
signal received from the potentiometer. The result
determines the direction of mix actuator rotation.
The mix actuator reacts to the composite air mix door
opening angle signal. Opening angle is increased or
decreased to maintain the temperature at the selected
level.
When the compressor is off, the air mix door moves
toward the COOL side. When the compressor turns on,
the temperature of the air being discharged from the
outlet vents is regulated.
When the temperature control is set to 18
C (65
F), the
air mix door moves to the FULL COOL position. When the
control is set to 32
C (90
F), the door moves to the FULL
HOT position.
In the VENT position, the air mix door moves from FULL
COOL to a 60% aperture. This prevents hot air from being
discharged into the vehicle.
C01R200005
Air Flow Control
In the Auto Mode

Automatic operation
When the AUTO switch or the DEF switch is pressed, a
signal indicating the forced air volume is sent to the A/C
auto-control unit. Other signals are sent to the control
unit from the various sensors. This data is analyzed by
the control unit which creates a composite data signal.
Based on this signal, the base voltage of the power
transistor is varied to change the blower voltage. This
results in a non-stepped change in blower motor
speed.
When the temperature control switch is set to either
18
C (65
F) or 32
C (90
F), blower motor speed is in
the MAX-HI mode.
In the Manual Mode

Manual operation
When the fan switch is manually set to a specified air
volume, a signal is sent to the A/C auto-control-unit. In
response to this signal, the auto-control unit controls
the blower voltage.
When the fan switch is set to HI, the max-hi relay
operates to increase blower motor speed to the
MAX-HI mode.
C01R200001

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±85
Compressor Control
In the automatic control mode, the automatic air
conditioner control unit turns on or off the compressor
with the evaporator anti-freeze mechanism using the
evaporation sensor. And, when outside air is detected to
be low through the outside air temperature sensor signal,
the control unit turns off the compressor using the
compressor control function.
Manual Control

In the automatic control mode, pressing the A/C (air
conditioning) switch turns off the compressor.

Pressing the DEF mode switch automatically turns on
the compressor.
C01R200002
Heater Start-up Control
Heater start-up control occurs when the air discharge
mode is in the BI=LEVEL, FOOT, or DEF/FOOT position
and the heater core temperature is less than 14
C (58
F).
Air discharge volume remains in the AUTO LO mode until
the engine coolant temperature rises above 14
C (58
F).
The volume then increases in linear increments to the
pre-set level.
840R200010
Cooler Start-up Control
When cooler operation is started with the air discharge
mode is in the VENT or B/L position and the in-car
temperature higher than 26
C (78
F) (detected by the
in-car sensor), cooler start-up control occurs.
For the first 7 seconds of cooler operation, the fan
remains OFF. It then switches to AUTO LO. Air discharge
volume then increases in linear increments to the pre-set
level.
Cooler start-up control occurs the first time the engine is
started or the cooler switch is moved from OFF to AUTO.
It will not occur during subsequent switch movements.
C06R200001

POWER±ASSISTED STEERING SYSTEM2A±7
Turn Signal Switch
This diagnosis covers mechanical problems only. Refer
to
Turn Signal Switch in Electrical section for electrical
diagnosis.
ConditionPossible causeCorrection
Turn Signal Will Not Stay In Turn
PositionForeign material or loose parts
preventing movement of yoke.Repair or replace signal switch.
Broken or missing detent or
canceling spring.Replace signal switch.
Turn Signal Will Not CancelLoose switch mounting screws.Tighten mounting screws.
Switch or anchor bosses broken.Replace turn signal switch.
Broken, missing or out of position
detent, return or canceling spring.Replace turn signal switch.
Worn canceling cam.Replace turn signal switch.
Turn Signal Difficult To OperateTurn signal switch arm loose.Tighten arm screw.
Broken or distorted yoke.Replace turn signal switch.
Loose or misplaced springs.Replace turn signal switch.
Foreign parts and/or material.Repair turn signal switch.
Loose turn signal switch mounting
screws.Tighten mounting screws.
Turn Signal Will Not Indicate Lane
ChangeBroken lane change pressure pad or
spring hanger.Replace turn signal switch.
Broken, missing or misplaced lane
change spring.Replace turn signal switch.
Base of wire damaged.Replace turn signal switch.
Hazard Switch Cannot Be Turned OffForeign material between hazard
switch to turn signal switch body.Repair or replace hazard switch.
No Turn Signal LightsElectrical failure in chassis harness.Refer to Electrical section.
Inoperative turn signal flasher unit.Replace flasher unit.
Loose chassis harness connector.Repair loose connector.
Front or Rear Turn Signal Lights Not
FlashingBurned-out or damaged turn signal
bulb.Replace bulb.
High resistance connection to
ground at bulb socket.Repair bulb socket.
Loose chassis harness connector.Repair loose connector.