Vehicle Speed TOYOTA AVALON 2001 Service Repair Manual
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Page 6 of 1897
I12987
AC2GL-01
- AIR CONDITIONINGAIR CONDITIONING AMPLIFIER (Manual A/C)
AC-77
1999 Author: Date:
2001 AVALON (RM808U)
AIR CONDITIONING AMPLIFIER
(Manual A/C)
ON-VEHICLE INSPECTION
INSPECT A/C AMPLIFIER CIRCUIT
(a) Remove the multi display with connectors still connected.
(b) Inspect wire harness side connector from the back side,
as shown in the chart below.
Test conditions:
Running engine at idle speed
A/C switch ON
Temperature control dial ºMAX COOLº position
Blower speed control switch at ºHIº position
Set on manifold gauge set
Tester connectionConditionSpecified condition
Refrigerant pressure at 196 - 3,140 kPaBelow 1.0 V
1 - GroundRefrigerant pressure less than 196 kPa or more
than 3,140 kPaBattery positive voltage
2 - GroundConstantPulse generation
5 - GroundA/C switch ONBattery positive voltage
7 - GroundEvaporator temperature at 25 °C (77 °F)Approx. 1.5 kW
8G dA/C switch ONBattery positive voltage8 - GroundA/C switch OFFBelow 1.0 V
9G dA/C switch ONBelow 2.0 V9 - GroundA/C switch OFFNo voltage
10 G dConstantBattery positive voltage10 - GroundEngine speed at idle-up speedBelow 1.0 V
11 G dA/C switch OFFBattery positive voltage11 - GroundA/C switch ONBelow 0.7 V
11 G dMagnetic clutch is engagedBelow 1.0 V11 - GroundMagnetic clutch is not engagedBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
Page 9 of 1897
N13790
Low Pressure
Service Valve
High Pressure
Service Valve
I12287
Properly
Charged
Insufficiently
Charged
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-13
1935 Author: Date:
2001 AVALON (RM808U)
3. CHARGE REFRIGERANT INTO REFRIGERANT SYS-
TEM
If there is no leak after refrigerant leak check, charge the proper
amount of refrigerant into refrigeration system.
CAUTION:
Never run the engine when charging the system
through the high pressure side.
Do not open the low pressure hand a valve when the
system is being charged with liquid refrigerant.
(a) Open the high pressure hand valve fully.
(b) Charge specified amount of refrigerant, then close the
high pressure hand valve.
HINT:
A fully charged system is indicated by the sight glass being free
of any bubbles.
(c) Charge partially refrigeration system with refrigerant.
(1) Set vehicle in these conditions:
Running engine at 1,500 rpm
Blower speed control set at ºHIº
Temperature control set at ºMAX. COOLº
Air inlet control set at ºRECIRCº
Fully open doors (Sliding roof: closed)
(2) Open the low pressure hand valve.
CAUTION:
Do not open the high pressure hand valve.
(d) Charge refrigerant until bubbles disappear and check the
pressure on the gauge through the sight glass.
(e) Replenishment to be 100 ± 50 g after bubbles disapper.
Page 12 of 1897
AC0YB-02
I12286
ight Glass
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-3
1925 Author: Date:
2001 AVALON (RM808U)
ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
Observe the sight glass on the liquid tube.
Test conditions:
Running engine at 1,500 rpm
Blower speed control switch at ºHIº position
A/C switch ON
Temperature control dial at ºCOOLº position
Fully open the doors
ItemSymptomAmount of refrigerantRemedy
1Bubbles present in sight glassInsufficient*
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
2No bubbles present in sight glassNone, sufficient or too muchRefer item 3 and 4
3No temperature difference between com-
pressor inlet and outletEmpty or nearly empty
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
4Temperature between compressor inlet and
outlet is noticeably differentCorrect or too muchRefer to items 5 and 6
5Immediately after air conditioning is turned
off, refrigerant in sight glass stays clearToo much
(1) Discharge refrigerant
(2) Evacuate air and charge proper amount
of purified refrigerant
6When air conditioning is turned off, refriger-
ant foams and then stays clearCorrect-
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.
Page 62 of 1897
AC104-03
I12942
1 2
- AIR CONDITIONINGCONDENSER FAN
AC-71
1993 Author: Date:
2001 AVALON (RM808U)
CONDENSER FAN
ON-VEHICLE INSPECTION
1. INSPECT CONDENSER FAN OPERATION
Inspect the fan operation at these conditions, as shown in the
chart.
Test conditions:
Start engine
Blower speed control switch position ºHIº
Temperature control dial at ºCOOLº position
Set on manifold gauge set
A/C switch ON
ConditionFan operation (Fan speed)
Engine coolant temperature
88 °C (190 °F) or belowRotate (Low speed)
Engine coolant temperature
98 °C (208 °F) or aboveRotate (High speed)
Refrigerant pressure is less than
1,520 kPa (15.5 kgf/cm2, 220 psi)Rotate (Low speed)
Refrigerant pressure is 1,520 kPa
(15.5 kgf/cm2, 220 psi) or aboveRotate (High speed)
If operation is not as specified, proceed to the next inspection.
2. INSPECT CONDENSER FAN MOTOR OPERATION
(a) Disconnect the fan connector.
(b) Connect battery and ammeter.
(c) Check that the fan rotates smoothly, and then check the
reading on the ammeter.
Specified amperage: 9.2 - 11.0 A at 20 °C (68 °F)
If operation is not as specified, replace the fan motor.
If operation is as specified, check the pressure switch, cooling
fan relays and water temp. switch.
Page 105 of 1897
Q05726
AX03O-04
Q04733
O-Ring
- AUTOMATIC TRANSAXLEDIRECT CLUTCH SPEED SENSOR
AX-3
1293 Author: Date:
2001 AVALON (RM808U)
DIRECT CLUTCH SPEED SENSOR
ON-VEHICLE REPAIR
1. REMOVE AIR CLEANER ASSEMBLY
2. DISCONNECT DIRECT CLUTCH SPEED SENSOR
CONNECTOR
3. REMOVE DIRECT CLUTCH SPEED SENSOR
(a) Remove the bolt and direct clutch speed sensor.
(b) Remove the O-ring from the direct clutch speed sensor.
4. INSTALL DIRECT CLUTCH SPEED SENSOR
(a) Coat a new O-ring with ATF and install it to the direct
clutch speed sensor.
(b) Install the direct clutch speed sensor with the bolt.
Torque: 11 N´m (110 kgf´cm, 8 ft´lbf)
5. CONNECT DIRECT CLUTCH SPEED SENSOR CON-
NECTOR
6. INSTALL AIR CLEANER ASSEMBLY
Page 170 of 1897
- BODY ELECTRICALAUDIO SYSTEM
BE-141
1745 Author: Date:
2001 AVALON (RM808U)
5. PROBLEM SYSMPTOMS TABLE
NOTICE:
When replacing the internal mechanism (computer part) of the audio system, be careful that no part
of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the re-
placement part (spare part).
HINT:
This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during sys-
tem operation and was prepared on the assumption of system component troubles (except for the wires and
connectors, etc.).
Always inspect the trouble taking the following items into consideration.
Open or short circuit of the wire harness
Connector or terminal connection fault
ProblemFlow chart No.
RadioRadio not operating when power switch turned to 'ON'.1
Display indicates when power switch turned to 'ON', but no sound (including
'noise') is produced.2
Noise present, but AM - FM not operating.3
Any speaker does not work.4
Any AM or FM does not work.5
Few preset turning bands.5
Reception poor.6
Sound quality poor.7
Preset memory disappears.8
Tape PlayerCassette tape cannot be inserted.9
Cassette tape inserted, but no power.10
Power coming in, but tape player not operating.11
Any speaker does not work.12
Sound quality poor.13
Tape jammed, malfunction with tape speed or auto-reverse.14
Cassette tape will not eject.15
CD Auto ChengerCD magazine cannot be inserted.16
CD magazine inserted, but no power.17
Power coming in, but CD player not operating.18
Sound jumps.19
Sound quality poor (Volume faint).20
Any speaker does not work.21
CD magazine will not be ejected.22
Power AmplifierNo power coming in.23
Power coming in, but power amplifier not operating.24
Any speaker does not work.25
NoiseNoise occurs26
Noise produced by vibration or shock while driving.27
Noise produced when engine starts.28
The term ºAMº includes LW,MW and SW, and the term ºFWº includes UKW.
Page 205 of 1897
I12784
Connector ºDº
Connector ºBº
- BODY ELECTRICALCOMBINATION METER
BE-55
1659 Author: Date:
2001 AVALON (RM808U)
G11 G dIgnition switch ONBattery positive voltageG11 - GroundIgnition switch OFF or ACCNo voltage
G12 - GroundEngine runningBattery positive voltage
If circuit is not as specified, wiring diagram and inspect the cir-
cuits connected to other parts.
3. INSPECT BETWEEN COMBINATION METER AND
MULTI INFORMATION DISPLAY CIRCUIT
Disconnect connector ºBº, ºDº from the multi information display
and combination meter inspect the connectors on the wire har-
ness side as shown in the table.
Tester connectionSpecified condition
B2 - D2Continuity
B3 - D3Continuity
B4 - D4Continuity
B5 - D5Continuity
B6 - D6Continuity
B8 - D8Continuity
B9 - D9Continuity
B10 - D10Continuity
B11 - D11Continuity
B12 - D12Continuity
B13 - D13Continuity
B14 - D14Continuity
If circuit is not as specified, wiring diagram and inspect the cir-
cuits connected to other parts.
4. INSPECT SPEEDOMETER ON-VEHICLE
Using a speedometer tester, inspect the speedometer for allow-
able indication error and check the operation of the odometer.
HINT:
Tire wear and tire over or under inflation will increase the indica-
tion error.
USA (mph)CANADA TAIWAN (km/h)
Standard indication Allowable range Standard indication Allowable range
20 18 - 24 20 17 - 24
40 38 - 44 40 38 - 46
60 58 - 66 60 57.5 - 67
80 78 - 88 80 77 - 88
100 98 - 110 100 96 - 109
120 118 - 132 120 115 - 130
140 134 - 151.5
160 153 - 173
If error is excessive, replace the speedometer.
Page 206 of 1897
N02332
1
2 3
I13320
A
DC
B BE-56
- BODY ELECTRICALCOMBINATION METER
1660 Author: Date:
2001 AVALON (RM808U)
5. INSPECT VEHICLE SPEED SENSOR OPERATION
(a) Connect the positive (+) lead from battery to terminal 1
and negative (-) lead to terminal 2.
(b) Connect the positive (+) lead from tester to terminal 3 and
the negative (-) lead to terminal 2.
(c) Rotate the shaft.
(d) Check that there is voltage change from approx. 0 V to 11
V or more between terminals 2 and 3.
HINT:
The voltage change should be 4 times for every revolution of
the speed sensor shaft.
If operation is not as specified, replace the sensor.
6. INSPECT SPEEDOMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to
the stopper.
Tester connectionResistance (W)
A - B250
C - D250
If resistance value is not as the specified, replace the meter.
7. INSPECT TACHOMETER/ON-VEHICLE
(a) Connect a tune-up test tachometer, and start the engine.
NOTICE:
Reversing the connection of the tachometer will dam-
age the transistors and diodes inside.
When removing or installing the tachometer, be care-
ful not to drop or subject it to heavy shocks.
(b) Compare the tester and tachometer indications.
DC 13.5 V 25 °C at (77°F)
Standard indicationAllowable range
700630 - 770
1,000900 - 1,100
2,0001,850 - 2,150
3,0002,800 - 3,200
4,0003,800 - 4,200
5,0004,800 - 5,200
6,0005,750 - 6,250
7,0006,700 - 7,300
Page 308 of 1897
BE-4
- BODY ELECTRICALTROUBLESHOOTING
1608 Author: Date:
2001 AVALON (RM808U)
COMBINATION METER (Meter, Gauges and Illumination):
SymptomSuspect AreaSee page
Tachometer, Fuel Gauge and Engine Coolant Temperature Gauge
do not operate.
1. ECU-B Fuse
2. ECU-IG No. 2 Fuse
3. Meter Circuit Plate
4. Wire Harness
5. Multi Display-
-
BE-43
-
-
Speedometer does not operate.
1. Vehicle Speed Sensor (ABS - ECU)
2. Meter Circuit Plate
3. Wire Harness
4. Multi DisplayBE-53
BE-43
-
-
Tachometer does not operate.
1. EFI - ECU
2. Meter Circuit Plate
3. Wire Harness
4. Multi Display-
BE-43
-
-
Fuel Gauge does not operate or abnormal operation.
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Meter Circuit Plate
4. Wire HarnessBE-53
BE-53
BE-43
-
Engine Coolant Temperature Gauge does not operate or abnormal
operation.
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Meter Circuit Plate
4. Wire HarnessBE-53
BE-53
BE-43
-
All illumination lights do not light up.
1. Bulb
2. PANEL Fuse
3. Light Control Rheostat
4. Wire Harness-
-
BE-53
-
Brightness does not change even when rheostat turned.
1. Bulb
2. Rheostat
3. Wire Harness-
-
-
Only one illumination light does not light up.1. Bulb
2. Wire Harness-
-
COMBINATION METER (Warning Lights):
SymptomSuspect AreaSee page
Warning lights do not light up. (Except Discharge, Open Door and
SRS)
1. Bulb
2. GAUGE No. 1 Fuse
3. Meter Circuit Plate
4. Wire Harness-
-
BE-53
-
Low Oil Pressure warning light does not light up.
1. Multi Display
2. Bulb
3. Low Oil Pressure Warning Switch
4. Meter Circuit Plate
5. Wire Harness-
-
BE-53
BE-43
-
Fuel Level warning light does not light up.
1. Multi Display
2. Bulb
3. Fuel Sender Gause
4. Meter Circuit Plate
5. Wire Harness-
-
BE-53
BE-43
-
ABS warning light does not light up.
1. Bulb
2. ABS ECU
3. Wire Harness-
DI-210
-
Page 573 of 1897
B09054
CO0WU-01
B09056
B09434
B09432
B09435
- COOLINGELECTRIC COOLING FAN
CO-23
1216 Author: Date:
2001 AVALON (RM808U)
ELECTRIC COOLING FAN
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION WITH LOW TEM-
PERATURE (Below 83°C (181°F))
(a) Turn the ignition switch ON.
(b) Check that the cooling fans stop.
If not, check the cooling fan relays and ECT switches.
(c) Disconnect the No.1 ECT switch wire connector.
(d) Connect terminals on the No.1 ECT switch wire connec-
tor.
(e) Check that the No.1 cooling fan rotates at high speed.
If not, check the No.1 cooling fan relay and No.1 cooling fan.
(f) Reconnect the No.1 ECT switch connector.
(g) Disconnect the No.2 ECT switch connector.
(h) Ground terminal on the No.2 ECT switch wire harness
side connector.
(i) Check that the No.1 and No.2 cooling fans rotate at low
speed.
If not, check the No.2 cooling fan relay, No.3 cooling fan relay
and No.2 cooling fan.
(j) Reconnect the No.2 ECT switch connector.