Nissan Primera P11. Instruction — part 469
Electrical Components Inspection
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HA-94
HA-86
Refer
to
EL
section.
HA-87
HA-98
HA-98
HA-1
13
Refer
to
EC
section.
Refer
to
EL
section.
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Blower
motor
Fan
resistor
Control
unit
Air
mix
door
PBR
Intake
door
motor
Auto
amp.
Ambient
sensor
In-vehicle
sensor
Sunload
sensor
Thermal
transmitter
A/C
relay
LO
relay
ML
relay
MH
relay
HI
relay
Thermo
control
amp.
Pressure
switch/sensor
Com-
pressor
ECM
Illumination
system
Harness
A/C
switch
REC
switch
Fan
switch
PTC
Magnetic
clutch
Thermal
protector
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TROUBLE DIAGNOSES
AUTO
Symptom Chart (Cont’d)
HA-29
Checking Resistor
Checking resistors are used for trouble diagnoses of blower
motor operation and air mix door motor operation. Use checking
resistor when inspecting portions with C/R *1, C/R *2 in flow
chart.
CAUTION:
Select checking resistors which have resistance values cor-
responding with those indicated in table below, and connect
to respective sensors.
Checking
resistor
Ambient
sensor
In-vehicle
sensor
Wattage
Blower motor opera-
tion check
C/R
*1
1,000
Ω
1,500
Ω
1/4W
Air mix door motor
operation check
C/R
*2
2,490
Ω
1. Disconnect ambient sensor and in-vehicle sensor harness
connectors.
2. Connect checking resistors to ambient sensor harness con-
nector and in-vehicle sensor harness connector when
inspecting portions with C/R *1, C/R *2 in flow chart in
trouble diagnoses.
3. Turn ignition switch ON.
4. Turn A/C switch ON.
5. Turn VENT mode.
6. Keep sunload sensor away from sunlight by covering it.
Preliminary Check
PRELIMINARY CHECK 1
Intake door is not set at “FRESH”.
Is intake door in “Fresh” position when
REC switch is turned from ON to OFF
with ignition switch at ON?
(Can you hear air moving from the
intake unit?)
Yes
E
No
Go to Diagnostic Pro-
cedure 9 (HA-69).
Is intake door in “REC” position when
REC switch is turned from OFF to ON
with ignition switch at ON?
(Can you hear air moving from the
intake unit?)
Yes
E
No
Go to Diagnostic Pro-
cedure 9 (HA-69).
INSPECTION END
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TROUBLE DIAGNOSES
AUTO
HA-30
PRELIMINARY CHECK 2
A/C does not blow cold air.
DOES AIR FLOW FROM
VENTS?
Condition
●
Engine running at operating
temperature.
●
Ignition switch, A/C switch, and
fan switch are ON.
●
Mode control knob is in VENT
mode and temperature control
knob is in full cold position.
Yes
E
No
IS BLOWER MOTOR OPERAT-
ING NORMALLY?
Yes
No
CHECK
BLOWER
MOTOR
OPERATION.
Go to Diag-
nostic Proce-
dure 1
(HA-52).
CHECK COMPRESSOR BELT
TENSION.
Refer to “Checking Drive Belts” in
MA section.
NG
OK
F
NG
CHECK COMPRESSOR OPERA-
TION.
OK
CHECK FOR EVAPORATOR
COIL FREEZE UP.
Remove intake unit. Check if
evaporator freezes.
NG
(Freezes up.)
OK
(Does not
freeze up.)
Adjust or
replace com-
pressor belt.
Refer to MA
section
(“ENGINE
MAINTE-
NANCE”).
CHECK REFRIGERATION
CYCLE PRESSURE WITH
RECOVERY/RECYCLING
EQUIPMENT CONNECTED.
Refer to Performance Chart.
NG
OK
CHECK VEN-
TILATOR
DUCT FOR
AIR LEAKS.
CHECK AMOUNT OF REFRIGER-
ANT.
Check amount of refrigerant using
refrigerant recovery & recharging
equipment.
OK
NG
Go to Perfor-
mance Test
Diagnoses.
CHECK THERMO CONTROL
AMP. AND A/C RELAY OPERA-
TION.
Go to Diagnos-
tic Procedure
10 (HA-70).
CHECK FOR
REFRIGER-
ANT LEAKS.
CHECK WATER COCK OPERA-
TION.
Warm up engine before checking.
OK
E
NG
Adjust or replace water cock.
CHECK VENTILATOR DUCT FOR
AIR LEAKS.
F
OK
CHECK EVAPORATOR OUTLET
AIR TEMPERATURE.
Refer to Performance Chart.
NG
CHECK AIR MIX DOOR OPERA-
TION.
(Refer to HA-90.)
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TROUBLE DIAGNOSES
AUTO
Preliminary Check (Cont’d)
HA-31
PRELIMINARY CHECK 3
Noise
Check where noise comes from.
Blower motor
Compressor
Expansion valve
Refrigerant line
Belt
Check for noise in
all modes and tem-
perature settings.
Noise is
constant.
Inspect the compres-
sor clutch and pul-
ley and idler pulley.
OK
NG
Replace expan-
sion valve.
The line is
fixed directly
to the body.
The line is
not fixed.
Check blower
motor for for-
eign particles.
Replace com-
pressor clutch
and pulley.
Refer to
HA-111, 114.
Fix the line
with rubber or
some vibration
absorbing
material.
Fix the line
tightly.
Check blower
motor and fan
for wear.
Check disc-to-pulley
clearance.
Refer to HA-113,
116.
OK
Noise is
intermittent.
Check air discharge
ducts for obstruc-
tions, foreign mate-
rials or air leakage.
Check and adjust
lubricant.
OK
The belt vibra-
tion is intense.
Side of belt
is worn out.
Replace compres-
sor and liquid tank.
Readjust belt
tension.
Refer to MA
section
(“Checking
Drive Belts”,
“ENGINE
MAINTE-
NANCE”).
The pulley
center does
not match.
Readjust
the pulley
center.
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TROUBLE DIAGNOSES
AUTO
Preliminary Check (Cont’d)
HA-32
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