Page 21 of 2543
AC±28
AC±30
AC±32
AC±34
AC±36
AC±38
AC±40
AC±42
AC±48
AC±42
AC±44
AC±48
AC±50
Trouble AreaMemory*5See page
(8.5 min. or more)
(8.5 min. or more)
(8.5 min. or more)
(8.5 min. or more)
(8.5 min. or more)
(1 min. or more)
(1 min. or more)
(15 secs. or more)
(15 secs. or more)
Room temp. sensorHarness or connector between room temp. sensor and A/C amplifier
A/C amplifier
Ambient temp. sensorHarness or connector between ambient temp. sensor and A/C amplifier
A/C amplifier
Evaporator temp. sensorHarness or connector between evaporator temp. sensor and A/C amplifier
A/C amplifier
Engine coolant temp. sensorHarness or connector between coolant temp. sensor and A/C amplifier
A/C amplifier
Solar sensorHarness or connector between sensor and A/C amplifier
A/C amplifier
Compressor drive beltCompressor lock sensorCompressorHarness and connector between A/C amplifier and compressor, compressor
lock sensor
A/C amplifier
Pressure switchHarness or connector between pressure switch and A/C amplifier
Refrigerant pipe lineA/C amplifier
Air mix damper position sensor A/C amplifierHarness or connector between air mix damper position sensor and A/C amplifier
Air outlet damper position sensor A/C amplifierHarness or connector between max cool damper position sensor and A/C amplifi-
er
Air mix damper control servo motorAir mix damper position sensorHarness and connector between A/C amplifier and air mix position sensor
Harness and connector between A/C amplifier and air mix damper controlservo motorA/C amplifier
Air outlet damper control servo motor Air outlet damper position sensorHarness and connector between A/C amplifier and air outlet position sensor
Harness and connector between A/C amplifier and air outlet damper motorA/C amplifier
HINT: *4Compressor lock (A/C light blink) is indicated only for a current malfunction. (See page AC±38)
To confirm the trouble indication, perform the following steps.
(1) With the engine ON, enter the trouble code check mode.
(2) Press the R/F switch to enter actuator check mode, and set the operation to Step No. 3.
(3) Press the AUTO switch to return to diagnostic sensor check mode.
(4) The A/C light starts to blink after approx. 3 secs.
*
5The A/C amplifier memorizes the trouble code of the respective malfunction when it occurs
for period of time indicated in the brackets.
± AIR CONDITIONING SYSTEMTROUBLESHOOTINGAC±21
Page 27 of 2543
HINT:
wIf the instruction ºProceed to next circuit inspection shown on matrix chart is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
wIf the trouble still reappears even though there are no abnormalities in any of the other circuits, then
check or replace the A/C amplifier.
AC±52
AC±54
AC±56
AC±58
AC±60
AC±62
AC±66
AC±69
IN±35
AC±71
AC±76
AC±77
AC±107
AC±92
AC±91
AC±95
AC±96
AC±98
AC±97
IG power source circuitBackup power source
circuitACC power source circuitHeater relay circuitCompressor circuitBlower motor circuitA/C amplifierTemperature set dial circuitA/C control assembly circuitRefrigeration system inspection
with manifold gauge setElectric cooling fanWater valveDrive belt tensionRefrigerant volumeCondenserExpansion valveEvaporatorHeater radiatorReceiver
± AIR CONDITIONING SYSTEMTROUBLESHOOTINGAC±27
Page 38 of 2543
Blinking Light A C Compressor Lock Sensor Circuit
CIRCUIT DESCRIPTION
This sensor sends 1 pulse per engine revolution to the A/C amplifier. If the number ratio of the compres-
sor speed divided by the engine speed is smaller than a predetermined value, the A/C amplifier turns
the compressor off. And, the indicator flashes at about 1 second intervals.
Diagnostic Sensor Check Detecting ConditionTrouble Area
CompressorCompressor drive belt
Compressor lock sensor
Harness and connector between compressor and
A/C amplifier
A/C amplifierAll conditions below are detected for 3 secs. or more
(a) Engine speed: 450 rpm or more
(b) Ratio between engine and compressor speed
deviates 20% or more in comparison to normal
operation.
AC±38± AIR CONDITIONING SYSTEMTROUBLESHOOTING
Page 39 of 2543
INSPECTION PROCEDURE
(See page AC±26).
(See page IN±30).
Repair or replace harness or connector.
Replace compressor lock sensor.
Check for open and short harness and connector between A/C amplifier
and room temperature sensor (See page
IN±30).
Check compressor lock sensor.
Check compressor.
Adjust drive belt tension or repair compressor.
Proceed to next circuit inspection shown on matrix
chart (See page AC±26). However, if the light is still
blinking, check and replace A/C amplifier.
Disconnect compressor lock sensor connector
Measure resistance between terminals 1 and 2 of
compressor lock sensor connector.
Resistance: at 20°C (68°F): 160 ~ 210
(1) Check compressor drive belt tension.
(2) Check the compressor does not lock during operation with engine started and blower
switch
and A/C switch ON.
± AIR CONDITIONING SYSTEMTROUBLESHOOTINGAC±39
Page 77 of 2543
DRIVE BELT TENSION
DRIVE BELT TENSION INSPECTION
1. INSPECT DRIVE BELT'S INSTALLATION CONDITION
Check that drive belt fits properly in the ribbed grooves.
2. INSPECT DRIVE BELT TENSION
Check that the tension is within A range on the auto tensioner
scale.
If the tension is not within the A range on the scale, replace
the belt with a new one.
HINT: When replacing the drive belt with a new one, the belt's
tension should be within the B range on the belt tensioner
scale.
IDLE±UP SPEED
IDLE UP SPEED INSPECTION
1. WARM UP ENGINE
2. INSPECT IDLE SPEED
Put gear shift in neutral.
2JZ±GE (M/T)
Magnetic clutch condition
Standard idle speed (RPM)
Not engaged Approx. 700
Engaged Approx. 900
2JZ±GE (A/T)
Magnetic clutch condition Standard idle speed (RPM) Not engaged Approx. 700
Engaged
Approx. 800
2JZ±GTE
Magnetic clutch condition Standard idle speed (RPM)
Not engaged Approx. 650 Engaged Approx. 800
± AIR CONDITIONING SYSTEMDRIVE BELT TENSIONAC±77
Page 86 of 2543
COMPRESSOR REMOVAL
1. RUN ENGINE AT IDLE SPEED WITH A/C ON FOR
APPROX. 10 MINUTES
2. STOP ENGINE
3. REMOVE BATTERY
4. DISCHARGE REFRIGERANT IN REFRIGERATION
SYSTEM
5. REMOVE DRIVE BELT
Loosen the drive belt tension by turning the drive belt tension-
er clockwise, and remove the drive belt.
6. REMOVE POWER STEERING PUMP
7. DISCONNECT DISCHARGE HOSE AND SUCTION HOSE
FROM COMPRESSOR
NOTICE: Cap the open fittings immediately to keep mois-
ture out of the system.
8. REMOVE COMPRESSOR
(a) Disconnect connector from compressor.
(b) Remove engine under cover.
(d) Remove the 4 bolts, nut and stud bolt.
(d) Remove the compressor. AC±86
± AIR CONDITIONING SYSTEMCOMPRESSOR
Page 90 of 2543
(c) Check the clearance between the pressure plate and rotor,
then connect the negative (±) terminal of the battery.
Standard clearance:
0.5 + 0.15 mm (0.020 + 0.0059 in.)
If the clearance is not within specification, adjust the clear-
ance using shims to obtain the standard clearance.
Shim Thickness:
0.1 mm (0.004 in.)
0.3 mm (0.012 in.)
0.5 mm (0.020 in.)
COMPRESSOR INSTALLATION
1. INSTALL COMPRESSOR
(a) Install the stud bolt.
Torque: 26 NVm (265 kgfVcm, 19 ftVlbf)
(b) Install the compressor with 4 bolts and nut.
Torque: 52 NVm (530 kgfVcm, 38 ftVlbf)
(c) Connect the magnetic clutch connector.
(d) Install the engine under cover.
2. CONNECT DISCHARGE HOSE AND SUCTION HOSE TO
COMPRESSOR
NOTICE: Hoses should be connected immediately after
the caps have been removed.
Torque: 10 NVm (100 kgfVcm, 7 ftVlbf)
3. INSTALL POWER STEERING PUMP
Install the power steering pump with 2 bolts.
Torque: 58 NVm (590 kgfVcm, 43 ftVlbf)
4. INSTALL DRIVE BELT
5. INSTALL BATTERY
6. EVACUATE AIR IN REFRIGERATION SYSTEM AND
CHARGE WITREFRIGERANT
Specified amount:
700 + 50 g (24.96 + 1.76 oz.)
7. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak tester, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
8. INSPECT A/C OPERATION AC±90
± AIR CONDITIONING SYSTEMCOMPRESSOR
Page 605 of 2543
PREPARATION
SST (SPECIAL SERVICE TOOLS)
09843±18020Diagnosis Check Wire
09808±14010Fuel Sender Gauge Tool Assy
09950±50010Puller C Set
RECOMMENDED TOOLS
09082±00050TOYOTA Electrical Tester Set
EQUIPMENT
Voltmeter
Ammeter
Ohmmeter
Test lead
Thermometer Engine oil level warning switch, Seat heater
Syphon Brake fluid level warning switch
Oil bath Engine oil level warning switch
Bulb (3.4 W) Fuel sender gauge, Seat belt warning relay Bulb (21 W) Turn signal flasher relay Dry cell battery Fuel sender gauge
Heat light
Seat heater
Torque wrench
Masking tape Rear window defogger wire
Tin foil Rear window defogger wire
SSM (SPECIAL SERVICE MATERIAL)
DuPont Paste No. 4817 or
equivalent
Rear window defogger
equivalent
± BODY ELECTRICAL SYSTEMPREPARATIONBE±3
