TOYOTA AVALON 2001 Service Repair Manual

AC2GH-01
I12960
I12956
I12969
Instrument Panel Register
Bracket
Radio
Bucket seat type:
Flash Receptacle
Bracket
A/C Control AssemblyBench seat type:
Instrument Lower Cover
A/C Amplifier
A/C Control Panel
Bulb (LCD Lighting)Bulb (Panel Lighting) Bulb (Panel Lighting)
HolderA/C Control Panel Case
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Auto A/C)
AC-73
1995 Author
: Date
:
2001 AVALON (RM808U)
AIR CONDITIONING CONTROL ASSEMBLY (Auto A/C)
COMPONENTS

I12931
AC2GI-01
I14061
I12932
AC-74
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Auto A/C)
1996 Author
: Date
:
2001 AVALON (RM808U)
DISASSEMBLY
1. REMOVE A/C CONTROL PANEL
(a) Remove the 4 screws.
(b) Using a screwdriver, release the 4 claws.
HINT:
Tape the screwdriver tip before use.
(c) Unlock the connector's lock and pull out the flat harness
from the A/C control panel.
2. REMOVE A/C AMPLIFIER
(a) Release the 2 claws and remove the holder.
(b) Hold the connector of amplifier and pull out the amplifier.
3. REMOVE BULB
Using a screwdriver, turn the bulb to the left and pull out the
bulb.

AC2GJ-01
I12984
3931: Bulb
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Auto A/C)
AC-75
1997 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. INSPECT ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal 31 and
the negative (-) lead to terminal 39, then check that the illumina-
tion lights up.
If there is bulb not light up, replace the bulb only. If all bulbs do
not light up, replace the A/C control panel.
2. INSPECT A/C CONTROL AMPLIFIER CIRCUIT
(See page DI-759)

AC2GK-01
I12932
I14062
I12931
AC-76
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Auto A/C)
1998 Author
: Date
:
2001 AVALON (RM808U)
REASSEMBLY
1. INSTALL BULB
(a) Install the bulb to the A/C control panel.
(b) Using a screwdriver, turn the bulb to the right and lock the
bulb.
2. INSTALL A/C AMPLIFIER
(a) Hold the connector of supply parts amplifier and pull out
the amplifier from electrostatic prevention bag.
(b) Hold the connector of amplifier and install the amplifier to
the A/C control panel case.
(c) Install the holder.
(d) Check the fitting for connector of amplifier.
3. INSTALL A/C CONTROL PANEL
(a) Unlock the connector's lock and push into the flat cable.
(b) INstall the A/C control panel.
(c) Check the fitting for 4 claws.
(d) INstall the 4 screws.

AC10F-02
- AIR CONDITIONINGAIR CONDITIONING AMPLIFIER (Manual A/C)
AC-79
2001 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page AC-78).

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.

AC2GM-01
AC-78
- AIR CONDITIONINGAIR CONDITIONING AMPLIFIER (Manual A/C)
2000 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
REMOVE MULTI DISPLAY (Built into the A/C amplifier) (See page BO-90)

AC20C-02
N13793
Charging Cylinder High Pressure
Service Valve Low Pressure
Service ValvePush
Air
N13792
Gas Leak
Detector AC-12
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
1934 Author
: Date
:
2001 AVALON (RM808U)
CHARGING
1. INSTALL CHARGING CYLINDER
HINT:
When handling the charging cylinder, always follow the direc-
tions given in the instruction manual.
(a) Charge the proper amount of refrigerant into the charging
cylinder.
(b) Connect the center hose to the charging cylinder.
CAUTION:
Do not open both high and low hand valves of manifold
gauge set.
(c) Open the valve of charging cylinder.
(d) Press the valve core on the side of manifold gauge and
expel the air inside of the center hose.
2. INSPECT REFRIGERATION SYSTEM FOR LEAKS
(a) Open the high pressure hand valve and charge refriger-
ant.
(b) When the low pressure gauge indicates 98 kPa
(1 kgf/cm
2, 14 psi) close the high pressure hand valve.
(c) Using a gas leak detector, check the system for leakage.
If leak is found, repair the faulty component or connection.
CAUTION:
Use the refrigerant recovery/ recycling machine to recover
the refrigerant whenever replacing parts.

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.

AC0YC-02
N13795
Quick Disconnect
Adapter
Charging
Service ValveHose
N13794
Vacuum Pump
Vacuum Pump Adapter
N13791
Low Pressure
Service Valve
Vacuum Pump Adapter High Pressure
Service ValveManifold
Gauge
Set
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC-1 1
1933 Author
: Date
:
2001 AVALON (RM808U)
EVACUATING
1. CONNECT QUICK DISCONNECT ADAPTER TO
CHARGING HOSES
2. REMOVE CAPS FROM SERVICE VALVES ON RE-
FRIGERANT LINES
3. SET ON MANIFOLD GAUGE SET
(a) Close both hand valves of manifold gauge set.
(b) Connect the quick disconnect adapters to the service
valves.
4. EVACUATE AIR FROM REFRIGERATION SYSTEM
(a) Connect the vacuum pump adapter to the vacuum pump.
(b) Connect the center hose of the manifold gauge set to the
vacuum pump adapter.
(c) Open both the high and low hand valves and run the vacu-
um pump.
(d) After 10 minutes or more, check that the low pressure
gauge indicates 750 mmHg (30 in. Hg) or more.
HINT:
If the reading is 750 mmHg (30 in. Hg) or more, close both hand
valves of manifold gauge set and stop the vacuum pump.
Check the system for leaks and repair if necessary.
(e) Close both the high and low hand valves and stop the vac-
uum pump.
(f) Leave the system in this condition for 5 minutes or more
and check that there is no gauge indicator.