Nissan Primera P11. Instruction — part 482
INTAKE DOOR MOTOR
The intake door motor is installed on the intake unit. When the
door position is determined by pushing the “REC” switch on the
control panel, the motor rotates and the air inlet is changed.
Removal and Installation
Refer to “INSTRUMENT PANEL” in BT section for details.
NOTE:
When removing the control panel, the Mode control cable should
be disconnected from the control panel rather than from the
heater.
Removal of the mode cable will result in breakage of the ferrule
retaining clips. On reassembly, the cable is retained by a snap
ring (Part number: 9-22504-1) which is pushed into a slot in the
control base plate which aligns with a groove in the cable sleeve.
NHA293
YHA294
Ignition switch
ON
Intake
door
motor
To A/C
control
KHA125
Snap ring
Control panel
Mode
cable
TROUBLE DIAGNOSES
AUTO
Control Panel System (Cont’d)
HA-81
Control Linkage Adjustment
MODE CONTROL CABLE
1. For RHD models, turn the mode control knob to the VENT
position.
For LHD models, turn the mode control knob to the DEF
position.
2. For RHD models, set the side link in the VENT position by
hand.
For LHD models, set the side link in the DEF position by
hand.
3. Pull on the cable cover in the direction of the arrow, then
clamp it.
After positioning control cable, check that it operates cor-
rectly.
WATER COCK CONTROL ROD
●
When adjusting water cock control rod, first disconnect
temperature control cable from air mix door lever and
then adjust control rod. Reconnect temperature control
cable and readjust it. (Refer to TEMPERATURE CON-
TROL CABLE.)
1. Push air mix door lever in direction of arrow.
2. Pull control rod of water cock in direction of arrow so as to
make clearance of about 2 mm (0.08 in) between ends of rod
and link lever and connect the rod to door lever.
After connecting control rod, check it operates correctly.
ZHA176A
.
ZHA176A
RHA630E
SHA522E
TROUBLE DIAGNOSES
AUTO
HA-82
AIR MIX DOOR
1. Install air mix door motor on heater unit.
Ensure that the air mix door motor lever is fitted into slit por-
tion of air mix door link.
2. Connect the air mix door motor harness connector.
3. Turn ignition switch to “ON” position.
4. Check that air mix door operates properly when PTC is
moved from 18 to 32°C (64 to 90°F).
After positioning control cable, check that it operates cor-
rectly.
FRESH VENT CONTROL CABLE
1. Turn the fresh vent control knob to the shut position.
2. Set the fresh vent door lever in shut position.
3. Adjust the position of the cable cover for proper operation,
then secure to the clamps.
After positioning control cables, check that it operates
correctly.
INTAKE DOOR MOTOR
1. Install intake door motor on intake unit.
Ensure that the intake door motor lever is fitted into the slit
portion of intake door link.
2. Connect the intake door motor harness connector.
3. Turn ignition switch to “ON” position.
4. Check that intake door operates properly when REC switch
is turned ON and OFF.
KHA127
Air mix door link
Air mix door lever
Air mix door motor
Heater unit
KHA126
Clamp
Pull
Clamp
Cable cover
ZHA178A
TROUBLE DIAGNOSES
AUTO
Control Linkage Adjustment (Cont’d)
HA-83
Overview of Control System
The control system consists of a) input sensors and switches, b)
the automatic amplifier (microcomputer), and c) outputs. The
relationship of these components is shown in the diagram below.
Control System Input Components
POTENTIO TEMPERATURE CONTROL (PTC)
The PTC is built into the control panel. It can be set at an inter-
val of 1°C in the 18°C to 32°C temperature range by pushing the
temperature button. The set temperature is digitally displayed.
Measure voltage between auto amp. terminal
p
4
and body
ground.
YHA295
A/C control panel
PTC
(Potentio temperature Con-
trol)
A/C switch
Autoswitch
Fan switch
Ambient sensor
In-vehicle sensor
sunload sensor
Thermal transmitter
Automatic ampli-
fier
(Micro-computer)
Air mix door motor
PBR (Potentio Balance Resistor-
)built-into air mix door motor
LOW, MED, HIGH and AUTO
Air mix door
Blower motor
NHA294
Temperature
button
NHA315
Auto amp. connector
SYSTEM DESCRIPTION
AUTO
HA-84
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