Operation
The auto ampli®er receives data from each of the sensors. The ampli®er sends air mix door and mode door
opening angle data to the air mix door motor LCU and mode door motor LCU.
The air mix door motor and mode door motor read their respective signals according to the address signal.
Opening angle indication signals received from the auto ampli®er and each of the motor position sensors are
compared by the LCUs in each motor with the existing decision and opening angles. Subsequently, HOT/
COLD or DEFROST/VENT operation is selected. The new selection data is returned to the auto ampli®er.
Transmission data and transmission order
Ampli®er data is transmitted consecutively to each of the door motors following the form shown in ®gure below.
Start: Initial compulsory signal sent to each of the door motors.
Address: Data sent from the auto ampli®er is selected according to data-based decisions made by the air mix
door motor and mode door motor.
If the addresses are identical, the opening angle data and error check signals are received by the door motor
LCUs. The LCUs then make the appropriate error decision. If the opening angle data is normal, door control
begins.
If an error exists, the received data is rejected and corrected data received. Finally, door control is based upon
the corrected opening angle data.
Opening angle: Data that shows the indicated door opening angle of each door motor.
Error check: Procedure by which sent and received data is checked for errors. Error data is then compiled.
The error check prevents corrupted data from being used by the air mix door motor and mode door motor.
Error data can be related to the following problems.
+Abnormal electrical frequency
+Poor electrical connections
+Signal leakage from transmission lines
+Signal level ¯uctuation
Stop signal: At the end of each transmission, a stop operation, in-operation, or internal problem message is
delivered to the auto ampli®er. This completes one data transmission and control cycle.
RHA441GA
DESCRIPTIONAUTO
Features (Cont'd)
HA-50
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
A/C System
TROUBLE DIAGNOSIS PROCEDURE FOR A/C SYSTEM
SYMPTOM:
+A/C system does not come on.
Inspection ¯ow
*1: HA-74 *2: HA-70
COMPONENT DESCRIPTION
Automatic ampli®er (Auto amp.)
The auto ampli®er has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The auto ampli®er is unitized with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into auto ampli®er.
Self-diagnostic functions are also built into auto ampli®er to provide
quick check of malfunctions in the auto air conditioner system.
Potentio temperature control (PTC)
The PTC is built into the A/C auto amp. It can be set at an interval
of 1ÉC in the 18ÉC to 32ÉC temperature range by turning the tem-
perature dial. The set temperature is digitally displayed.
SHA019F
RHA629G
RHA746G
TROUBLE DIAGNOSESAUTO
HA-73
SYSTEM DESCRIPTION
Component parts
Mode door control system components are:
1) Auto amp.
2) Mode door motor (LCU)
3) In-vehicle sensor
4) Ambient sensor
5) Sunload sensor
6) Intake sensor
System operation
The auto ampli®er receives data from each of the sensors. The ampli®er sends air mix door and mode door
opening angle data to the air mix door motor LCU and mode door motor LCU.
The air mix door motor and mode door motor read their respective signals according to the address signal.
Opening angle indication signals received from the auto ampli®er and each of the motor position sensors are
compared by the LCUs in each motor with the existing decision and opening angles. Subsequently, HOT/
COLD or DEFROST/VENT operation is selected. The new selection data is returned to the auto ampli®er.
SHA006FA
TROUBLE DIAGNOSESAUTO
Mode Door Motor (Cont'd)
HA-76
SYSTEM DESCRIPTION
Component parts
Air mix door control system components are:
1) Auto amp.
2) Air mix door motor (LCU)
3) In-vehicle sensor
4) Ambient sensor
5) Sunload sensor
6) Intake sensor
System operation
The auto ampli®er receives data from each of the sensors. The ampli®er sends air mix door and mode door
opening angle data to the air mix door motor LCU and mode door motor LCU.
The air mix door motor and mode door motor read their respective signals according to the address signal.
Opening angle indication signals received from the auto ampli®er and each of the motor position sensors are
compared by the LCUs in each motor with the existing decision and opening angles. Subsequently, HOT/
COLD or DEFROST/VENT operation is selected. The new selection data is returned to the auto ampli®er.
RHA424GB
TROUBLE DIAGNOSESAUTO
Air Mix Door Motor (Cont'd)
HA-80
SYSTEM DESCRIPTION
Auto ampli®er controls compressor operation by ambient tempera-
ture and signal from ECM (ECCS control module).
Low temperature protection control
Auto ampli®er will turn the compressor ``ON'' or ``OFF'' as deter-
mined by a signal detected by ambient sensor.
When ambient temperatures are greater than 1ÉC, the compressor
turns ``ON''. The compressor turns ``OFF'' when ambient tempera-
tures are less than þ2ÉC.
RHA094GA
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-93
ROOM/L - Wiring diagram ..............................EL-95
Radiator ..........................................................LC-14
Radio - See Audio.........................................EL-168
Rear axle (disc brake type) ..............................RA-6
Rear bumper .....................................................BT-6
Rear case (Transfer) .......................................TF-10
Rear combination lamp removal and
installation ...................................................BT-26
Rear cover packing replacement diff..............PD-11
Rear disc brake ..............................................BR-24
Rear door ........................................................BT-10
Rear fog lamp .................................................EL-80
Rear heater - Wiring diagram ........................HA-14
Rear seat belt ...................................................RS-5
Rear seat ........................................................BT-35
Rear side window ...........................................BT-44
Rear suspension ............................................RA-12
Rear washer..................................................EL-145
Rear window defogger ..................................EL-158
Rear window ...................................................BT-42
Rear wiper.....................................................EL-145
Refrigerant connection precaution ...................HA-2
Refrigerant discharging evacuating
charging ....................................................HA-113
Refrigerant general precaution.........................HA-2
Refrigerant lines ...........................................HA-117
Refrigeration cycle ..........................................HA-11
Release bearing (clutch) .................................CL-11
Removal and installation (Transfer) ..................TF-8
Reverse idler shaft (M/T) ...............................MT-10
Reverse lamp switch (M/T) - See
Back-up lamp switch (M/T)...........................MT-4
Reverse main gear (M/T) ...............................MT-10
Ring gear diff. inspection ...............................PD-19
Road wheel size ..............................................GI-38
Roof trim .........................................................BT-20
Room lamp - See Interior lamp ......................EL-93
Rotor disc (front) .............................................FA-14
S
S/LOCK - Wiring diagram .............................EL-215
S/SIG - Wiring diagram ................................EC-162
SAE J1930 terminology list .............................GI-43
SEAT - Wiring diagram .................................EL-190
SMJ (super multiple junction) .......................EL-317
SROOF - Wiring diagram .............................EL-186
SRS - See Supplemental Restraint
System ..........................................................RS-8
SRS Trouble diagnoses .................................RS-22
STAB - Wiring diagram ..................................RA-18
START - Wiring diagram .................................EL-45
Screw jack .......................................................GI-39
Seal - See Exterior .........................................BT-26
Seat belt inspection .......................................MA-27
Seat belt pre-tensioner disposal ....................RS-17
Seat belt pre-tensioner ...................................RS-12
Seat belt, front ..................................................RS-2
Seat belt, rear...................................................RS-5Seat, front .......................................................BT-32
Seat, rear ........................................................BT-35
Seat, second (2nd) .........................................BT-35
Seat, third (3rd) ...............................................BT-37
Second (2nd) seat ..........................................BT-35
Self-diagnostic results ....................................EC-31
Shift control (Transfer) ....................................TF-12
Shift control components (M/T) ......................MT-12
Shift fork (M/T) ...............................................MT-12
Shift lever .......................................................MT-12
Shock absorber (front) ....................................FA-25
Shock absorber (rear) ....................................RA-14
Side bearing preload (front ®nal drive
4WD)...........................................................PD-27
Side bearing preload diff. ...............................PD-27
Side trim ..........................................................BT-14
Side window - See Rear side window ............BT-44
Speedometer.................................................EL-102
Spiral cable.....................................................RS-13
Stabilizer bar (front) ........................................FA-25
Stabilizer bar (rear) ........................................RA-15
Stabilizer release device - Wiring
diagram .......................................................RA-18
Stabilizer release device ................................RA-16
Standardized relay ............................................EL-3
Start signal ...................................................EC-162
Starter .............................................................EL-51
Starting system ...............................................EL-45
Steering gear and linkage inspection ............MA-26
Steering linkage ..............................................ST-19
Steering switch................................................EL-59
Steering wheel and column ..............................ST-8
Steering wheel play ..........................................ST-4
Steering wheel turning force .............................ST-6
Striking rod (M/T) ...........................................MT-12
Sub-gear (M/T) ...............................................MT-10
Sunload sensor ............................................HA-107
Sunroof, electric ............................................EL-186
Sunroof............................................................BT-39
Super lock .....................................................EL-211
Supplemental Restraint System .......................RS-8
Supplemental restraint system - Wiring
diagram .......................................................RS-27
Symbols and abbreviations ...............................GI-7
Synchronizer (M/T) .........................................MT-10
T
TCV - Wiring diagram ..................................EC-100
Tachometer ...................................................EL-102
Thermometer .................................................EL-116
Thermostat ......................................................LC-12
Third (3rd) seat ...............................................BT-37
Three way catalyst precautions.........................GI-4
Throttle control solenoid valve .....................EC-155
Throttle control solenoid valve .....................EC-161
Throwout bearing - See Clutch release
bearing ........................................................CL-11
Thrust washer selection diff. ..........................PD-27
ALPHABETICAL INDEX
IDX-6
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owners can perform the
checks and inspections themselves or they can have their NISSAN dealers do them.
Item Reference pages
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed from time to time, unless otherwise
speci®ed.
TiresCheck the pressure with a gauge periodically when at a service station, including the
spare, and adjust to the speci®ed pressure if necessary. Check carefully for damage, cuts or
excessive wear.Ð
Windshield wiper bladesCheck for cracks or wear if they do not wipe properly. Ð
Doors and engine hoodCheck that all doors, the engine hood, the trunk lid and back door
operate properly. Also ensure that all latches lock securely. Lubricate hinges, latches, rollers and
links if necessary. Make sure that the secondary latch keeps the hood from opening when the
primary latch is released.
When driving in areas using road salt or other corrosive materials, check for lubrication fre-
quently.MA-27
Tire rotationTires should be rotated every 5,000 km (3,000 miles) for 4WD models. MA-25
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when per-
forming periodic maintenance, cleaning the vehicle, etc.
LightsMake sure that the headlights, stop lights, tail lights, turn signal lights, and other lights
are all operating properly and installed securely. Also check headlight aim.Ð
Warning lights and chimesMake sure that all warning lights and chimes are operating prop-
erly.Ð
Steering wheelCheck for change in the steering conditions, such as excessive free play, hard
steering or strange noises.
Free play: Less than 35 mm (1.38 in)Ð
Seat beltsCheck that all parts of the seat belt system (e.g. buckles, anchors, adjusters and
retractors) operate properly and smoothly, and are installed securely. Check the belt webbing for
cuts, fraying, wear or damage.MA-27
UNDER THE HOOD AND VEHICLE
The maintenance items listed here should be checked periodically e.g. each time you check the
engine oil or refuel.
Windshield washer ¯uidCheck that there is adequate ¯uid in the tank. Ð
Engine coolant levelCheck the coolant level when the engine is cold. MA-14, 15
Engine oil levelCheck the level after parking the vehicle on a level spot and turning off the
engine.MA-13, 14
Brake and clutch ¯uid levelMake sure that the brake and clutch ¯uid levels are between the
``MAX'' and ``MIN'' lines on the reservoir.MA-20, 23
BatteryCheck the ¯uid level in each cell. It should be between the ``MAX'' and ``MIN'' lines. Ð
GENERAL MAINTENANCE
MA-3