low oil pressure TOYOTA AVALON 2001 Service Repair Manual

I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-7
1929 Author
: Date
:
2001 AVALON (RM808U)
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 No air bubbles seen through the
sight glass even when the engine
rpm is lowered Unable to develop sufficient per-
formance due to excessive refrig-
eration system
 Insufficient cooling of condenser Excessive refrigerant in
cycle " refrigerant over charged
 Condenser cooling " condenser
fins clogged of condenser fan
faulty
(1) Clean condenser
(2) Check condenser fan motor
operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
Charge proper amount of refriger-
ant
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 The low pressure piping hot to
touch
 Bubbles seen in sight glass
Air entered in refrigeration system
 Air present in refrigeration sys-
tem
 Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant

AC2810
AC0Y9-02
AC2811
N11084
Wrong Okay
HI LO HILO
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-1
1923 Author
: Date
:
2001 AVALON (RM808U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR WEAR EYE PROTECTION
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin.
(a) Wash the area with lots of cool water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPLY PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERATION SYS-
TEM
If there is not enough refrigerant in the refrigerant system oil lu-
brication will be insufficient and compressor burnout may occur,
so that care to avoid this, necessary care should be taken.
7. DO NOT OPEN PRESSURE MANIFOLD VALVE WHILE
COMPRESSOR IS OPERATE
If the high pressure valve is opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.

AC101-03
I12941
AC-66
- AIR CONDITIONINGPRESSURE SWITCH
1988 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
HINT:

Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O-ring with the compressor oil and install
them to the switch.

AC101-03
I12941
AC-66
- AIR CONDITIONINGPRESSURE SWITCH
1988 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
HINT:

Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O-ring with the compressor oil and install
them to the switch.

I12543
E2 *2
E7 *2
C4
C7 ECU
ODO/TRIP
MODE
RESET/AD
SELECT
ON/OFF
Speed control
Unit
Open door indicator
SRS warning
SRS cut off indicator
(Passenger)
Discharge warning
Washer level warning
Low oil pressure warning
Passenger seat belt warning
VSC warning
CRUISE main indicator
ABS warning
VSC cut off warning
TRAC warning
Brake warning
Rear light indicator
Mulfunction indicator
Driver seat belt warning *1: Hi-Grade
*2: Lo-Grade
F4
F2 F7 G14 G4 F9 G7 F5 F3 F10 G10 F6F1 G8 G6 G2
G12 C11
*1
G13G5G3
G11 C18 BE-46
- BODY ELECTRICALCOMBINATION METER
1650 Author
: Date
:
2001 AVALON (RM808U)

C
No.Wire Connector Side
1
2
3
4
6
7
8
9
10
11
12
13
14
15
16ECU-IG No. 2 Fuse
Injector *
1
F (Panel) Fuse
Outside temperature sensor
ECM *
1
ABS ECU
Fuel sender gauge
Fuel sender gauge
Light control volume
RAD No. 1 Fuse Ground
ECU-ACC Fuse
-
Engine coolant temperature sendoer gauge
EFI
Heater control ECU *
117
18
19
20
21Speed control unit
Fuel sender gauge
-
Sender ground
Ground 22Starter Relay
D1
2
3
4
6
7
8
9
10
11
12
13
14
15
16-
Combination meter
-
-
-
- 17
18 -Low oil pressure warning switch *
2
Compressor lock sensor *2
A/C magnet switch
Evaporator temperature sensor *
2
A/C switch *2
A/C indicator *2
-
*1: Hi GradeECM
*2: Lo Grade 5
5Combination meter
Combination meter
Combination meter
Combination meter
Combination meter Combination meter
Combination meter
Combination meter
Combination meter
Combination meter
Combination meter
E
No.Wire Connector Side
1
2
3
4
6
7
8
9
10
11
12
13
14
15
16
17
18
19
205 1
2Compass sensor *1
Compass sensor *1
Compass sensor *1
-
-
-
-
-
-
-
-
-
- Compass sensor *
1
7
Compass sensor *1
- BODY ELECTRICALCOMBINATION METER
BE-47
1651 Author
: Date
:
2001 AVALON (RM808U)

I07709
35.63 ± 0.1 W
Slide
rheostat
35.63 ±
0.1 W
Z15789
Warning Light
Ignition
Switch
BatteryWire Harness
N06640
BE1217
Warning Light
Ignition
Switch
Battery
- BODY ELECTRICALCOMBINATION METER
BE-59
1663 Author
: Date
:
2001 AVALON (RM808U)
15. INSPECT ENGINE COOLANT TEMPERATURE SEND-
ER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and ad-
just the ammeter pointer to indicate º0º using the slide rheostat,
then read the rheostat indication.
Temperature °C (°F)Resistance (W)
50 (122.0)160 - 240
120 (248.0)17.1 - 21.2
If resistance value is not as specified, replace the engine cool-
ant sender gauge.
16. INSPECT LOW OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
17. INSPECT LOW OIL PRESSURE WARNING SWITCH
OPERATION
(a) Check that continuity exists between the terminal and
ground with the engine stopped.
(b) Check that no continuity exists between the terminal and
ground with the engine running.
HINT:
Oil pressure should be over 29 kPa (0.35 kgf/cm
2, 4.3 psi)
If operation is not as specified, replace the switch.
18. INSPECT BRAKE WARNING LIGHT
(a) Disconnect the connector from the brake fluid warning
switch.
(b) Release the parking brake pedal.
(c) Connect the terminals on the wire harness side of the lev-
el warning switch connector.
(d) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.

I12532
Door Courtesy Switch
Fuel Sender Gauge
Light Failure Sensor Seat Belt Buckle Switch
Engine Coolant Temperature Sender Gauge
Park/Neutral Position Switch Low Oil Pressure Warning Switch
Occupant Detection Sensor
BE-42
- BODY ELECTRICALCOMBINATION METER
1646 Author
: Date
:
2001 AVALON (RM808U)

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
-

BO0XM-03
H12101
150 mm (5.91 in.)
- BODYHOOD SUPPORT
BO-7
1792 Author
: Date
:
2001 AVALON (RM808U)
HOOD SUPPORT
REPLACEMENT
1. REMOVE SUPPORT FROM HOOD
Remove the bolt and support from the hood.
HINT:
While supporting the hood by hand, remove the support.
2. REMOVE SUPPORT FROM BODY
Remove the bolt and support.
3. IF NECESSARY, REPLACE HOOD SUPPORT
NOTICE:
Handling the hood support

Do not disassemble the support because the cylinder
is filled with pressurized gas.

If the support is to be replaced, drill a 2.0 - 3.0 mm
(0.079 - 0.118 in.) hole in the area shown in the il-
lustration to completely discharge the high-pressure
gas before disposing of it.

When drilling, chips may fly out so work carefully.

The gas is colorless, odorless and non-toxic.

When working, handle the support carefully. Never
score or scratch the exposed part of the piston rod,
and allow any paint or oil to get on it.

Do not turn the piston rod and cylinder with the sup-
port fully extended.
4. INSTALL HOOD SUPPORT
(a) Install the bolt and hood support to the body.
Torque: 17 N´m (175 kgf´cm, 13 ft´lbf)
(b) Install the bolts and hood support to the hood.
Torque: 17 N´m (175 kgf´cm, 13 ft´lbf)