Page 571 of 1500
FLOOR, SEAT AND ROOF
CONFIGURATION DIAGRAMS80-22
D-26 (20-Y) SRS-ECU (FLOOR HARNESS)
D-27 (20-Y) SRS-ECU (FLOOR HARNESS)
D-28 (5-B) SEAT BELT BUCKLE SWITCH
(DRIVER’S SIDE)
D-30 (2) WHEEL SPEED SENSOR (REAR:
RH)
D-31 (2) WHEEL SPEED SENSOR (REAR:
LH)
D-32 (2-R) SIDE AIR BAG MODULE (SQUIB)
(RH)
D-33 (2-B) SEAT BELT PRETENSIONER (RH)
D-34 (3) FRONT DOOR SWITCH (RH)D-35 (2) SIDE IMPACT SENSOR (RH)
D-36 (10) FLOOR WIRING HARNESS AND
REAR DOOR WIRING HARNESS
(RH) COMBINATION
D-38 (8) POWER SEAT (MEMORY) (RH)
D-39 (2) POWER SEAT ASSEMBLY (LH)
D-39-1 (5-W) FRONT HEIGHT MOTOR
D-39-2 (5-B) REAR HEIGHT MOTOR
D-39-3 (4) SEAT SLIDE MOTOR
D-39-4 (8) SEAT ADJUST SWITCH (LH)
D-40 (1-B) CAPACITOR
Page 579 of 1500

CIRCUIT DIAGRAMS90-2
AUTOMATIC AIR CONDITIONING
SYSTEM . . . . . . . . . . . . . . . . . . . . . . .90-71
WINDSHIELD WIPER AND WASHER90-75
REAR WINDOW DEFOGGER . . . . . .90-78
REMOTE CONTROLLED MIRROR . .90-79
AUDIO SYSTEM . . . . . . . . . . . . . . . .90-80
ACCESSORY SOCKET . . . . . . . . . . .90-82
CLOCK DISPLAY . . . . . . . . . . . . . . .90-83
MULTI-CENTER DISPLAY . . . . . . . .90-84
SUNROOF . . . . . . . . . . . . . . . . . . . . .90-87
AUTO-CRUISE CONTROL SYSTEM90-89
ANTI-LOCK BRAKING SYSTEM (ABS)
CONTROL (TCL)> . . . . . . . . . . . . . . .90-93
ANTI-LOCK BRAKING SYSTEM (ABS)
CONTROL (TCL)> . . . . . . . . . . . . . . .90-96SUPPLEMENTAL RESTRAINT
SYSTEM (SRS) . . . . . . . . . . . . . . . . . .90-99
ENGINE IMMOBILISER SYSTEM . . .90-103
POWER SEAT WITH MEMORY
(DRIVER). . . . . . . . . . . . . . . . . . . . . . .90-104
POWER SEAT (8-WAY)
(DRIVER AND PASSENGER) . . . . . .90-106
POWER SEAT [(6-WAY) DRIVER] . .90-108
FORGOTTEN KEY PREVENTION
FUNCTION . . . . . . . . . . . . . . . . . . . . .90-109
LIGHTING MONITOR TONE ALARM90-111
IGNITION KEY REMINDER TONE
ALARM . . . . . . . . . . . . . . . . . . . . . . . .90-112
SEAT BELT WARNING TONE
ALARM . . . . . . . . . . . . . . . . . . . . . . . .90-113
DOOR AJAR WARNING TONE
ALARM . . . . . . . . . . . . . . . . . . . . . . . .90-115
RHEOSTAT . . . . . . . . . . . . . . . . . . . . .90-118
CONTROLLER AREA NETWORK
(CAN) . . . . . . . . . . . . . . . . . . . . . . . . .90-119
Page 690 of 1500
SEAT BELT WARNING TONE ALARM
CIRCUIT DIAGRAMS90-113
SEAT BELT WARNING TONE ALARMM1901011200749
Page 691 of 1500
SEAT BELT WARNING TONE ALARM
CIRCUIT DIAGRAMS90-114
Page 702 of 1500

HEATER, AIR CONDITIONING AND VENTILATION55-1
GROUP 55
HEATER, AIR
CONDITIONING AND
VENTILATION
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .55-3
AUTO A/C DIAGNOSIS . . . . . . . . . . .55-5
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . 55-5
AUTOMATIC AIR CONDITIONING
TROUBLESHOOTING STRATEGY . . . . . . 55-5
DIAGNOSTIC FUNCTION . . . . . . . . . . . . . 55-5
DIAGNOSTIC TROUBLE CODE CHART . 55-9
DIAGNOSTIC TROUBLE CODE
PROCEDURES . . . . . . . . . . . . . . . . . . . . . . 55-10
SYMPTOM CHART . . . . . . . . . . . . . . . . . . 55-68
SYMPTOM PROCEDURES . . . . . . . . . . . . 55-69
DATA LIST REFERENCE TABLE . . . . . . . 55-133
ACTUATOR TEST REFERENCE . . . . . . . . 55-136
CHECK AT A/C-ECU TERMINAL . . . . . . . . 55-137
SPECIAL TOOLS . . . . . . . . . . . . . . . .55-139
ON-VEHICLE SERVICE . . . . . . . . . . .55-141
REFRIGERANT LEVEL TEST . . . . . . . . . . 55-141
A/C COMPRESSOR CLUTCH TEST . . . . . 55-141
SIMPLE INSPECTION OF THE A/C
PRESSURE SENSOR . . . . . . . . . . . . . . . . 55-141
COMPRESSOR DRIVE BELT
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 55-142
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . 55-142
PERFORMANCE TEST . . . . . . . . . . . . . . . 55-143
REFRIGERANT LEAK INSPECTION
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . 55-144A/C NOISE TEST . . . . . . . . . . . . . . . . . . . . 55-146
POWER RELAY CHECK . . . . . . . . . . . . . . . 55-148
IDLE-UP OPERATION CHECK . . . . . . . . . . 55-149
HEATER CONTROL ASSEMBLY AND
A/C SWITCH . . . . . . . . . . . . . . . . . . . .55-150
REMOVAL AND INSTALLATION . . . . . . . . 55-150
HEATER UNIT, HEATER CORE,
BLOWER ASSEMBLY AND
EVAPORATOR UNIT . . . . . . . . . . . . .55-151
REMOVAL AND INSTALLATION . . . . . . . . 55-151
REMOVAL AND INSTALLATION . . . . . . . . 55-153
DISASSEMBLY AND ASSEMBLY . . . . . . . 55-154
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 55-155
BLOWER ASSEMBLY DISASSEMBLY
AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . 55-156
MOTORS AND TRANSISTOR . . . . . .55-157
REMOVAL AND INSTALLATION . . . . . . . . 55-157
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 55-158
SENSORS . . . . . . . . . . . . . . . . . . . . . .55-160
REMOVAL AND INSTALLATION . . . . . . . . 55-160
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 55-161
Continued on next page
Page 703 of 1500

HEATER, AIR CONDITIONING AND VENTILATION55-2
AMBIENT TEMPERATURE
SENSOR. . . . . . . . . . . . . . . . . . . . . . .55-162
REMOVAL AND INSTALLATION . . . . . . . . 55-162
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 55-163
COMPRESSOR ASSEMBLY AND
DRIVE BELT . . . . . . . . . . . . . . . . . . .55-164
REMOVAL AND INSTALLATION . . . . . . . . 55-164
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 55-166
AIR GAP CHECK . . . . . . . . . . . . . . . . . . . . 55-166
CONDENSER AND CONDENSER
FAN . . . . . . . . . . . . . . . . . . . . . . . . . .55-167
REMOVAL AND INSTALLATION . . . . . . . . 55-167
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 55-168
DRYER REPLACEMENT . . . . . . . . . . . . . . 55-168
REFRIGERANT LINE . . . . . . . . . . . . .55-170
REMOVAL AND INSTALLATION . . . . . . . . 55-170
O-RING AND PIPE INSTALLATION . . . . . . 55-172
DUCTS . . . . . . . . . . . . . . . . . . . . . . . .55-175
REMOVAL AND INSTALLATION . . . . . . . . 55-175
VENTILATORS . . . . . . . . . . . . . . . . . .55-177
REMOVAL AND INSTALLATION . . . . . . . . 55-177
SPECIFICATIONS . . . . . . . . . . . . . . .55-178
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 55-178
GENERAL SPECIFICATIONS . . . . . . . . . . 55-178
SERVICE SPECIFICATIONS . . . . . . . . . . . 55-178
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . 55-178
Page 843 of 1500

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-142
4. At this time, check to see that the voltage of A/C pressure
sensor terminal No. 2 reflects the specifications of the fig-
ure.
NOTE: The allowance shall be defined as
5%.
COMPRESSOR DRIVE BELT ADJUSTMENTM1552001000357
Refer to GROUP 00, Maintenance Service Drive Belts
P.00-39.
CHARGING M1552001200403
Use the refrigerant recovery station to charge the refrigerant.
METHOD BY USING REFRIGERANT RECOVERY
AND RECYCLING UNIT
Using the refrigerant recovery and recycling unit, refill the
refrigerant.
NOTE: Refer to the Refrigerant Recovery and Recycling Unit’s
Instruction Manual for operation of the unit.
DISCHARGING SYSTEM
Use the refrigerant recovery unit to discharge refrigerant gas
from the system.
NOTE: Refer to the Refrigerant Recovery and Recycling Unit’s
Instruction Manual for operation of the unit.
REFILLING OF OIL IN THE A/C SYSTEM
Too little oil will provide inadequate compressor lubrication and
cause a compressor failure. Too much oil will increase dis-
charge air temperature.
When a compressor is installed at the factory, it contains 140
ml of refrigerant oil. While the A/C system is in operation, the oil
is carried through the entire system by the refrigerant. Some of
this oil will be trapped and retained in various parts of the sys-
tem.
When the following system components are changed, it is nec-
essary to add oil to the system to replace the oil being removed
with the component.
Compressor oil: ND Oil 8
Quantity:
Evaporator: 40 ml
Condenser: 40 ml
Page 847 of 1500

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-146
Sharper bends will reduce the flow of refrigerant. The flexible
hose lines should be routed so that they are at least 80 mm
(3.1 inches) from the exhaust manifold. It is good practice to
inspect all flexible hose lines at least once a year to make sure
they are in good condition and properly routed.
On standard plumbing fittings with O-rings, these O-rings are
not reusable.
AIR CONDITIONING NOISE TEST
You must first know the conditions when the noise occurs.
These conditions are: weather, vehicle speed, in gear or neu-
tral, engine temperature or any other special conditions.
Noises that develop during A/C operation can often be mislead-
ing. For example: what sounds like a failed front bearing or
connecting rod, may be caused by loose bolts, nuts, mounting
brackets, or a loose clutch assembly. Verify accessory drive
belt tension (power steering or generator).
Improper accessory drive belt tension can cause a misleading
noise when the compressor is engaged and little or no noise
when the compressor is disengaged.
Drive belts are speed-sensitive. That is, at different engine
speeds, and depending upon belt tension, belts can develop
unusual noises that are often mistaken for mechanical prob-
lems within the compressor.
Normal air conditioning operation will generate some level of
operational noise. To judge what is normal and abnormal,
requires an understanding of the air conditioning system. This
test is to detail the most common noise complaints and the
repair methods.
VEHICLE CONDITION
1. Ensure the system is not over or under charged.(Refer to
P.55-142).
2. Tighten all compressor mounting bolts, clutch mounting
bolts and compressor drive belt.
3. Inspect layout of the system is correct, ie no interference
between hoses and all retaining clamps are in place.