1998 NISSAN PATROL clock

SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to
an CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers
will not properly connect to the CFC-12 (R-12) system. However, if
an improper connection is attempted, discharging and contamina-
tion may occur.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and speci-
®ed lubricants have been used with the scale. If the scale controls
refrigerant ¯ow electronically, the hose ®tting must be 1/2²-16
ACME.
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be
vented into air from cylinder's top valve when ®lling the cylinder with
refrigerant. Also, the accuracy of the cylinder is generally less than
that of an electronic scale or of quality recycle/recharge equipment.
RHA273D
RHA274D
PRECAUTIONS AND PREPARATIONMANUAL AND AUTO
Precautions for Service Equipment (Cont'd)
HA-10

Self-diagnosis
INTRODUCTION AND GENERAL DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors,
blower motor, etc. by system line. Refer to applicable sections
(items) for details. Shifting from normal control to the self-diagnos-
tic system is accomplished by starting the engine (turning the igni-
tion switch from ``OFF'' to ``ON'') and pressing ``
'' switch for at
least 5 seconds. The ``
'' switch must be pressed within 5 sec-
onds after starting the engine (ignition switch is turned ``ON''). This
system will be canceled by either pressing
(AUTO) switch or
turning the ignition switch ``OFF''. Shifting from one step to another
is accomplished by means of turning temperature dial clockwise or
counterclockwise, as required.
Additionally shifting from STEP 4 to AUXILIARY MECHANISM is
accomplished by means of pushing
(fan) switch.
(Ignition switch OFF®ON)
Within 5 seconds after starting engine (ignition
switch is turned ``ON''), press
switch for
at least 5 seconds.
STEP 1 Ð LEDs and LCD are checked.
m
Left turnRight turn
STEP 2 Ð Input signals from each sensor are
checked.
m
Left turnRight turn
STEP 3 Ð Mode and intake door motor posi-
tion switch is checked.Ignition switch: OFFc
or(AUTO) switch: ONSelf-diagnostic function is canceled.m
Left turnRight turn
Note
STEP 4 Ð Actuators are checked.
m
AUXILIARY MECHANISM Ð Temperature set-
ting trimmerNote:
For STEP 4, engine must be running for
compressor to operate.
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
HA-63

STEP-BY-STEP PROCEDURE
Turn ignition switch ON.
Set in self-diagnostic mode. Within 5 sec-
onds after starting engine (ignition switch is
turned ``ON''.), press
switch for at
least 5 seconds.
STEP 1 - LEDs AND LCD ARE CHECKED.
Do all LEDs and LCD illuminate?
Ye s
cNo
Malfunctioning
switch, LED or LCD.
Replace A/C auto amp.
Turn temperature dial clockwise.
Advance to self-diagnosis STEP 2?
Ye s
cNo
Malfunctioning temperature
dial.
Replace A/C auto amp.
Turn temperature dial counterclockwise.
Return to self-diagnosis STEP 1?
Ye s
cNo
Malfunctioning temperature
dial.
Replace A/C auto amp.
Turn temperature dial clockwise.
jA
(Go to next page.)
RHA526G
RHA527G
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Self-diagnosis (Cont'd)
HA-64

jA
STEP 2 - SENSOR CIRCUITS ARE
CHECKED FOR OPEN OR SHORT
CIRCUIT.
Does code No.
appear on the dis-
play?
Ye sNo
.
Turn temperature
dial clockwise.Refer to the following chart for malfunctioning code
No.
(If two or more sensors malfunction, corresponding
code Nos. blink respectively two times.)
*1: Conduct self-diagnosis STEP 2 under sunshine.
When conducting indoors, aim a light (more than
60W) at sunload sensor, otherwise Code No.
will indicate despite that sunload sensor is func-
tioning properly. j
B
(Go to next page.)
Code No.Malfunctioning sensor
(including circuits)Reference
page
Ambient sensor HA-103A/C LED
In-vehicle sensor HA-105A/C LED
Sunload sensor*1 HA-107A/C LED
Air mix door motor
(LCU) PBRHA-79
A/C LED
RHA970DA
RHA528G
RHA501A
.
.
.
TROUBLE DIAGNOSESAUTO
Self-diagnosis (Cont'd)
HA-65

jB
STEP 3 - MODE DOOR POSITIONS
ARE CHECKED.
Does code No.
appear on the dis-
play?
Ye sNo
.
Turn temperature
dial clockwise.Mode door motor position switch is malfunctioning.
(If two or more mode doors are out of order, corre-
sponding code numbers blink respectively two
times.)
*1: If mode door motor harness connector is
disconnected, the following display pattern will
appear.
®
®®®®þ
jC
(Go to next page.)
Code
No.*1Mode door positionReference
page
VENT
HA-75
B/L
FOOT
F/D
DEF
RHA869DC
RHA168DA
RHA498A
.
.
.
TROUBLE DIAGNOSESAUTO
Self-diagnosis (Cont'd)
HA-66

AUXILIARY MECHANISM: Temperature setting trimmer
The trimmer compensates for differences in range of  3ÉC between
temperature setting (displayed digitally) and temperature felt by
driver.
Operating procedures for this trimmer are as follows:
+Begin Self-diagnosis STEP 4 mode.
+Press
(fan) switch to set system in auxiliary mode.
+Turn temperature dial clockwise or counterclockwise as
desired. Temperature will change at a rate of 1ÉC each time a
switch is pressed.
When battery cable is disconnected, trimmer operation is can-
celed. Temperature set becomes that of initial condition, i.e.
0ÉC.
RHA581G
TROUBLE DIAGNOSESAUTO
Self-diagnosis (Cont'd)
HA-68

b. Con®rm that discharge air comes out according to the air dis-
tribution table at left.
Refer to ``Discharge Air Flow'' (HA-13).
NOTE:
Con®rm that the compressor clutch is engaged (visualinspec-
tion) and intake door position is at FRESH when the DEF
is selected.
Intake door position is checked in the next step.
4. Check recirculation
a. Press RECswitch.
Recirculation indicator should illuminate.
b. Listen for intake door position change (you should hear blower
sound change slightly).
5. Check temperature dial
a. Turn temperature dial counterclockwise until 18ÉC is displayed.
b. Check for cold air at discharge air outlets.
c. Turn temperature dial clockwise until 32ÉC is displayed.
d. Check for hot air at discharge air outlets.
RHA654FD
RHA521G
RHA522G
TROUBLE DIAGNOSESAUTO
Operational Check (Cont'd)
HA-71

Air mix door control speci®cation
COMPONENT DESCRIPTION
The air mix door motor is attached to the heater unit. It rotates so
that the air mix door is opened or closed to a position set by the
auto ampli®er. Motor rotation is then conveyed through a shaft and
the air mix door position is then fed back to the auto ampli®er by
PBR built-in air mix door motor.
CONTROL LINKAGE ADJUSTMENT
Air mix door (Water cock)
1. Install air mix door motor on heater unit and connect it to main
harness.
2. Set up code No.
in Self-diagnosis STEP 4. Refer to HA-67.
3. Move air mix door lever by hand and hold it in full cold position.
4. Attach air mix door lever to rod holder.
5. Make sure air mix door operates properly when changing from
code No.
toby pushing DEF switch.
Full cold Full hot
6. Set up code No.in Self-diagnosis STEP 4.
7. Attach water cock cable to air mix door linkage and secure with
clip.
8. Rotate and hold water cock lever AND plate in the full cold
position (CLOCKWISE completely).
9. Attach water cock cable to plate and secure with clip (white
mark on cable housing should be centered under the retaining
clip).
10. Check that water cock operates properly when changing from
code No.
toby pushing DEF switch. (After several
cycles, water cock lever should be midpoint of plate opening
when code No.
is set.)
RHA690G
RHA696G
SHA522E
TROUBLE DIAGNOSESAUTO
Air Mix Door Motor (Cont'd)
HA-81