2001 TOYOTA AVALON check engine

I12940
1
23 4
AC100-03
Z13470
Magnetic clutch control
Low pressure side
ON (Continuity)
196 kpa
(2.0 kgf/cm
2, 28 psi)
OFF (No Continuity)High pressure side
3,140 kpa
(32.0 kgf/cm2, 455 psi)
OFF (No Continuity)
Z13471
Cooling fan control
ON1,520 kpa
(15.5 kgf/cm
2, 220 psi)
(No Continuity) (Continuity)
OFF
1,226 kpa
(12.5 kgf/cm
2, 178 psi)
- AIR CONDITIONINGPRESSURE SWITCH
AC-65
1987 Author
: Date
:
2001 AVALON (RM808U)
PRESSURE SWITCH
ON-VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET (See page AC-20)
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 1,500 RPM
4. Magnetic clutch control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (-) lead to terminal 1.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. Cooling fan control:
INSPECT PRESSURE SWITCH OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (-) lead to terminal 3.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET
7. CONNECT CONNECTOR TO PRESSURE SWITCH

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
-

Q06496
- AUTOMATIC TRANSAXLEPARK/NEUTRAL POSITION (PNP) SWITCH
AX-5
1295 Author
: Date
:
2001 AVALON (RM808U)
(f) Install the control cable and nut.
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
(g) Install the clip to the shift control cable.
5. CONNECT PARK/NEUTRAL POSITION SWITCH CON-
NECTOR
6. CHECK PARK/NEUTRAL POSITION SWITCH OPERA-
TION
Check that the engine can be started with the shift lever only in
the N or P position, but not in other positions.
If not as started above, carry out the adjustment procedure
(See page DI-160).
7. TEST DRIVE VEHICLE
8. INSTALL ENGINE UNDER COVER

BE-136
- BODY ELECTRICALAUDIO SYSTEM
1740 Author
: Date
:
2001 AVALON (RM808U)
3. Europe models:
DIAGNOSIS CODE LIST
TermsMeaning
Physical addressThree-digit code (shown in hexadecimal) which is given to each component com-
prising the AVC-LAN.
Corresponding to the function, individual symbols are specified.
Logical addressTwo-digit code (shown in hexadecimal) which is given to each function comprising
the inner system of the AVC-LAN.
(a) Physical address 190: Radio receiver assembly
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for
starting an engine.
*2: It is stored when 180 sec. has passed after the power supply connector is pulled out after engine
start.
*3: It may be stored when the engine key is turned 1 min. again after engine start.
*4: It may be stored when the engine key is turned again after engine start.
*5: When 210 sec. has passed after pulling out the power supply connector of the master component
with the ignition switch in ACC or ON, this code is stored.
(1) Logical address: 01 (Communication control)
DTCDiagnosis itemDiagnosis contentCountermeasure and inspected parts
D6
*1Absence of MasterComponent in which this code is recorded
has been disconnected from system with
ignition in ACC or ON. Or, when this code
was recorded, multi-display assembly was
disconnected.Check harness for power supply system of
multi-display.
Check harness for communication system
of multi-display.
Check harness for power supply system of
radio and player.
Check harness for communication system
of radio and player.
D8
*2No Response to Connection CheckComponent shown by auxiliary code is or
had been disconnected from system after
engine is start.
D9Check harness for power supply system of
component shown by auxiliary code.
Check harness for communication system
of component shown by auxiliary code.
D9
*1Last Mode ErrorComponent operated (sounds and/or
images were provided) before engine stop is
or has been disconnected with ignition
switch in ACC or ON.Check harness for power supply system of
component shown by auxiliary code.
Check harness for communication system
of component shown by auxiliary code.
DANo Response to ON/OFF InstructionNo response is identified when changing
mode (audio and visual mode change).
Detected when sound and picture does not
change by button operation.Check harness for power supply system of
component shown by auxiliary code.
Check harness for communication system
of component shown by auxiliary code.
If error occurs again, replace component
shown by auxiliary code.
DB
*1Mode Status ErrorDual alarm is detected.Check harness for power supply of compo-
nent shown by auxiliary code.
Check harness for communication system
of component shown by auxiliary code.
DC
*3Transmission ErrorTransmission to component shown by auxil-
iary code has been failed.
(Detecting this DTC does not necessarily
mean actual failure.)If same auxiliary code is recorded in order
component, check harness for power supply
and communication system of all compo-
nents shown by code.

- BODY ELECTRICALAUDIO SYSTEM
BE-137
1741 Author
: Date
:
2001 AVALON (RM808U) DD
*4
Master Reset (Momentary Interruption)After engine is started, multi-display assem-
bly was disconnected from system.Check harness for power supply system of
multi-display.
Check harness for communication system
of multi-display.
Check harness for power supply system of
radio and player.
Check harness for communication system
of radio and player.
If this error occurs frequently, replace mul-
ti-display assembly.
DE
*4Slave Reset (Momentary Interruption)After engine is started, slave component
was disconnected from system.Check harness for power supply of compo-
nent shown by auxiliary code.
Check harness for communication system
of component shown by auxiliary code.
DF
*5Master ErrorDue to defective condition of component
with a display, master function is switched to
audio equipment.
Error occurs in communication between
sub-master (audio) and master component.Check harness for power supply of multi-
display assembly.
Check harness for communication system
of multi-display assembly.
Check harness for communication system
between multi-display assembly and sub-
master component.
E0
*1Registration Completion Instruction ErrorºRegistration Completion Instructionº com-
mand from master cannot be received.Since this DTC is provided for engineering
purpose, it may be detected when no actual
failure exists.
E1
*1Audio processor ON errorWhile source equipment is operating, AMP
output is stopped.Check harness for power supply of multi-
display assembly.
Check harness for communication system
of multi-display assembly.
E2ON/OFF Instruction Parameter ErrorError occurs in ON/OFF controlling com-
mand from multi-display assembly.Replace multi-display assembly.
E3
*1Registration Request TransmissionRegistration Request command is output
from slave component.
Receiving Connection Check Instruction,
Registration Request command is output
from sub-master component.Since this DTC is provided for engineering
purpose, it may be detected when no actual
failure exists.
E4
*1Multiple Frame AbortMultiple frame transmission is aborted.Since this DTC is provided for engineering
purpose, it may be detected when no actual
failure exists.
(2) Logical address: 61 (Cassette switch)
DTCDiagnosis itemDiagnosis contentCountermeasure and inspected parts
40Mechanical of Media ErrorMalfunction due to mechanical failure is
identified.
Or cassette tape is cut or entangled.Inspect cassette tape.
Replace radio and player.
(b) Physical address: 440 Stereo component amplifier
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for
starting an engine.
*2: It may be stored when the engine key is turned 1 min. again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*4: When 210 sec. has passed after pulling out the power supply connector of the master component
with the ignition switch in ACC or ON, this code is stored.

BE-138
- BODY ELECTRICALAUDIO SYSTEM
1742 Author
: Date
:
2001 AVALON (RM808U)
Logical address: 01 (Communication control)
DTCDiagnosis itemDiagnosis contentCountermeasure and inspected parts
D6
*1Absence of MasterComponent in which this code is recorded
has been disconnected from system with
ignition in ACC or ON. Or, when this code
was recorded, multi-display assembly was
disconnected.Check harness for power supply of radio
and player.
Check harness for communication system
of radio and player.
Check harness for power supply of stereo
component amplifier.
Check harness for communication system
of stereo component amplifier.
D4Communication Check ErrorComponent in which this code is recorded is
or was disconnected from system after en-
gine start. Or, when recording this code,
multi-display assembly was disconnected.Check harness for power supply of radio
and player.
Check harness for communication system
of radio and player.
Check harness for power supply of stereo
component amplifier.
Check harness for communication system
of stereo component amplifier.
D1
*2Transmission ErrorTransmission to component shown by auxil-
iary code has been failed.
(Detecting this DTC does not necessarily
mean actual failure.)If same auxiliary code is recorded in order
component, check harness for power supply
and communication system of all compo-
nents shown by code.
(c) Physical address: 240 CD Auto Changer
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for
starting an engine.
*2: It may be stored when the engine key is turned 1 min. again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*4: It may be stored when the engine key is turned again after engine start.
*5: When 210 sec. has passed after pulling out the power supply connector of the master component
with the ignition switch in ACC or ON, this code is stored.
(1) Logical address: 01 (Communication control)
DTCDiagnosis itemDiagnosis contentCountermeasure and inspected parts
DITransmission ErrorTransmission to component shown by auxil-
iary code has been failed.
(This code does not necessarily mean actu-
al failure.)If same auxiliary code is recorded in other
component(s), check harness for power
supply and communication system of com-
ponents shown sub code.
D4
*5Connection check Error
Component in which this code is recorded is
or was disconnected from system after en-
gine start. Or, when recording this code,
multi-display assembly was disconnected.Check harness for power supply of multi-
display.
Check harness for communication system
of multi-display.
Check harness for power supply of CD
auto changer.
Check harness for communication system
of CD auto changer.
(2) Logical address: 63 (CD Auto Changer)
DTCDiagnosis itemDiagnosis contentCountermeasure and inspected parts
60CD ErrorError is detected in CD auto changer.Replace CD auto changer
61EJECT ErrorMagazine cannot be ejected.Replace CD auto changer
62No Disc ReadoutDisc cannot be read.Inspect CD

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.

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