2001 TOYOTA AVALON relay

AC0YE-02
I12953I12946
I12964
Auto A/C:
Ambient Temperature
Sensor
Pressure Switch
Compressor
Relay Block No. 8

No. 2 Cooling Fan Relay

No. 3 Cooling Fan RelayJunction Block No. 8

Heater Main Relay

Magnetic Clutch Relay
Condenser Fan
Condenser
Auto A/C:
Solar Sensor
A/C Control Assembly

Auto A/C:
A/C Amplifier

Manual A/C:
A/C Switch
Manual A/C:
Blower Speed Control Switch

Manual A/C:
Mode Control Switch
Auto A/C:
Room Temperature Sensor
A/C Unit

Heater Radiator

Evaporator

Expansion Valve

Evaporator Temp. Sensor

Auto A/C
Air Mix Servomotor

Air Outlet Servomotor
Blower Unit

Blower Motor

Manual A/C:
Blower Resistor

Auto A/C:
Blower Motor Linear Controller

Air inlet Servomotor
Manual A/C:
Multi Display (Built
into the A/C amplifier)
AC-14
- AIR CONDITIONINGAIR CONDITIONING SYSTEM
1936 Author
: Date
:
2001 AVALON (RM808U)
LOCATION

I12944
No. 2 Cooling
Fan Relay
AC20V-02
I12945
No. 3 Cooling
Fan Relay
N23635
35
4 1 2
I05027
5
12
3
1 3
2 5
AC-70
- AIR CONDITIONINGCOOLING FAN RELAY
1992 Author
: Date
:
2001 AVALON (RM808U)
COOLING FAN RELAY
INSPECTION
1. REMOVE NO. 2 COOLING FAN RELAY FROM RELAY
BLOCK NO. 8
2. REMOVE NO. 3 COOLING FAN RELAY FROM RELAY
BLOCK NO. 8
3. INSPECT NO. 2 COOLING FAN RELAY
(Marking: A.C FAN NO. 2) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2
3 - 4Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
4. INSPECT NO. 3 COOLING FAN RELAY
(Marking: A.C FAN NO. 3) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.

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.

I12918
Heater Main
RelayAC20T-02
Z19533
34 5
12123 4 5 AC-68
- AIR CONDITIONINGHEATER MAIN RELAY
1990 Author
: Date
:
2001 AVALON (RM808U)
HEATER MAIN RELAY
INSPECTION
1. REMOVE HEATER MAIN RELAY FROM NO. 2 J/B
2. INSPECT HEATER MAIN RELAY
(Marking: HTR) CONTINUITY
ConditionTester connectionSpecified condition
Constant2 - 4
3 - 5Continuity
Apply B+ between
terminals 3 and 5.1 - 2Continuity
If continuity is not as specified, replace the relay.

I12919
Magnetic
Clutch Relay
AC20U-03
Z18060
13
2 5
5 2
3
1
- AIR CONDITIONINGMAGNETIC CLUTCH RELAY
AC-69
1991 Author
: Date
:
2001 AVALON (RM808U)
MAGNETIC CLUTCH RELAY
INSPECTION
1. REMOVE MAGNETIC CLUTCH RELAY FROM NO. 2
J/B
2. INSPECT MAGNETIC CLUTCH RELAY
(Marking: MG CLT) CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.

AC2FV-01
- AIR CONDITIONINGTROUBLESHOOTING (Manual A/C)
AC-15
1937 Author
: Date
:
2001 AVALON (RM808U)
TROUBLESHOOTING (Manual A/C)
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order If necessary , replace these parts.
SymptomSuspect AreaSee page
No blower operation
2. HTR Fuse
3. Heater main relay
4. Blower motor
5. Blower resistor
6. Blower speed control switch
7. Wire harness-
AC-68
AC-56
AC-57
AC-83
-
No blower control
1. Blower motor
2. Blower resistor
3. Blower speed control switch
4. Wire harnessAC-56
AC-57
AC-83
-
No air temperature control1. Engine coolant volume
2. Heater control assembly-
AC-80
No compressor operation
1. Refrigerant volume
2. A.C Fuse
3. Magnetic clutch
4. Compressor lock sensor
5. Compressor
6. Pressure switch
7. Heater main relay
8. Blower speed control switch
9. A/C switch
10.A/C amplifier
11. Evaporator temp. sensor
12.Wire harnessAC-3
-
AC-42
AC-42
AC-42
AC-65
AC-68
AC-83
AC-83
AC-77
AC-64
-
No cool air comes out
1. Refrigerant volume
2. Refrigerant pressure
3. Drive belt
4. Magnetic clutch
5. Compressor lock sensor
6. Pressure switch
7. Evaporator temp. sensor
8. A/C switch
9. A/C amplifier
10.Heater control assembly
11. Wire harnessAC-3
AC-3
AC-17
AC-42
AC-42
AC-65
AC-64
AC-83
AC-77
AC-80
-
No engine idle-up when A/C switch ON
1. A/C amplifier
2. Idle control system
3. Wire harnessAC-77
DI-102
-
No air inlet control
1. Air inlet servomotor
2. Heater control assembly
3. Wire harnessAC-39
AC-80
-
No mode control
1. Air outlet servomotor
2. Heater control assembly
3. Wire harnessAC-60
AC-80
-

BE0I5-03
I0502712
3 5
1
2 3
5
BE-34
- BODY ELECTRICALBACK-UP LIGHT SYSTEM
1638 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
INSPECT BACK-UP LIGHT RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.

BE0I4-04
I12528
Ignition Switch
Back-Up Light Relay
Back-Up Light
Driver Side Junction Block

ECU-ACC Fuse
- BODY ELECTRICALBACK-UP LIGHT SYSTEM
BE-33
1637 Author
: Date
:
2001 AVALON (RM808U)
BACK-UP LIGHT SYSTEM
LOCATION