2001 TOYOTA AVALON cruise control

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-559
715 Author
: Date
:
2001 AVALON (RM808U) CAN e GND
WLWB
Ignition switch ON
Cancel switch OFF10 - 16 VCAN e GND
(C15-1 e C15-16)W-L e W-BIgnition switch ON
Cancel switch ONBelow 1 V
SPD e GND
(C15 12C15 16)V-W e W-B
Engine start
Car stoppage.Below 1.5 V or
4.7 - 16 V
(C15-12 e C15-16)VW e WB
During driving (Pulse generated).3 - 7 V
IDL e GND YWB
Ignition switch ON
Throttle valve fully opened.10 - 16 VIDL e GND
(C15-13 e C15-16)Y e W-BIgnition switch ON
Throttle valve fully closed.Below 1.5 V
OD e GNDGRWB
During cruise control driving
OD switch ON.10 - 16 VOD e GND
(C15-14 e C15-16)GR e W-BDuring cruise control driving
OD switch OFF (3rd driving)Below 1 V
MO e GND PWB
During cruise control driving
ACC switch hold ON9 - 15 VMO e GND
(C15-15 e C15-16)P e W-BDuring cruise control driving
COAST switch hold ONBelow 1 V
GND e Body Ground
(C15-16 e Body Ground)W-B e Body
GroundConstantBelow 1 V

EM0ZK-02
A10837
No.2 Cooling Fan Connector
Upper Radiator
Support
Radiator
Assembly RH Fender
Apron
Seal
Generator
Drive
Belt
A/C Compressor
Connector
Battery
Insulator
Battery
Battery
Tray Generator Drive
Belt Adjusting
Bar Bracket
LH Fender
Apron Seal

Gasket A/C Compressor
43 (440, 32)
25 (250, 18)

Non-reusable partStay
N´m (kgf´cm, ft´lbf) Front Exhaust Pipe: Specified torque
Gasket
62 (630, 46)
33 (330, 24)


62 (630, 46)
43 (430, 32)

Gasket
Actuator Cover No.3 Engine Room
Relay BlockHood
Hold-Down
Clamp
Washer
Hose for
Windshield
Air Filter
Air Cleaner Case
O-Ring
Drain Plug Lower Radiator
SupportAir Cleaner
Cap Assembly Radiator Upper Hose
Cruise Control
Actuator
Cruise Control
Actuator
ConnectorAccelerator Cable
PS Pump

PS Pump
Drive Belt
Compression Spring
V-Bank Cover
A/T Oil Cooler Hose
Radiator Lower
HoseEVAP Hose
Assembly
MAF Meter Connector
VSV for Active
Control Engine
Mount
No.1 ECT Switch Wire Connector
No.1 Cooling Fan Connector
Vacuum Hose
Air Hose
EM-70
- ENGINE MECHANICALENGINE UNIT
1054 Author
: Date
:
2001 AVALON (RM808U)
ENGINE UNIT
COMPONENTS

EM-80
- ENGINE MECHANICALENGINE UNIT
1064 Author
: Date
:
2001 AVALON (RM808U)
(d) Install the support stay with the 2 bolts.
Torque: 33 N´m (330 kgf´cm, 24 ft´lbf)
18. INSTALL RADIATOR (See page CO-22)
19. INSTALL CRUISE CONTROL ACTUATOR
20. INSTALL AIR CLEANER CAP ASSEMBLY AND AIR
CLEANER CASE
21. CONNECT ACCELERATOR CABLE
22. INSTALL V-BANK COVER
(a) Using a 5 mm hexagon wrench, install the V-bank cover
with the 3 cap nuts.
(b) Press down the V-bank cover fastener.
23. INSTALL ENGINE FENDER APRON SEALS
24. INSTALL BATTERY TRAY AND BATTERY
25. INSTALL HOOD
26. FILL ENGINE WITH OIL
27. FILL WITH ENGINE COOLANT
28. START ENGINE AND CHECK FOR LEAKS
29. PERFORM ROAD TEST
Check for abnormal noise, shock, slippage, correct shift points
and smooth operation.
30. RECHECK ENGINE COOLANT AND OIL LEVELS

EM0ZL-02
A10518
5 mm
Hexagon
Wrench
A07300
EM-72
- ENGINE MECHANICALENGINE UNIT
1056 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. REMOVE BATTERY AND TRAY
2. REMOVE HOOD
3. REMOVE ENGINE FENDER APRON SEALS
4. DRAIN ENGINE COOLANT
5. DRAIN ENGINE OIL
6. REMOVE V-BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 3 cap nuts.
(b) Loosen the V-bank cover fastener counterclockwise.
(c) Remove the V-bank cover.
7. DISCONNECT ACCELERATOR CABLE
8. REMOVE AIR CLEANER CAP ASSEMBLY AND AIR
CLEANER CASE
9. REMOVE CRUISE CONTROL ACTUATOR
10. REMOVE RADIATOR (See page CO-17)
11. REMOVE FRONT EXHAUST PIPE
(a) Remove the 2 bolts holding the support stay to the sup-
port bracket.
(b) Remove the 2 bolts and 2 compression springs holding
the front exhaust pipe to the center exhaust pipe.
(c) Remove the 4 nuts holding the front exhaust pipe to the
exhaust manifolds.
(d) Remove the front exhaust pipe and 3 gaskets.
12. DISCONNECT CONNECTORS, CABLE, CLAMPS AND
HOSES
(a) Remove the bolt and disconnect the ground strap from
the LH fender apron.
(b) Disconnect the 2 ground strap connectors from the RH
fender apron.
(c) Disconnect the ground cable from the A/T.
(d) Disconnect the engine wire protector clamp from the bat-
tery body bracket.
(e) Disconnect the engine wire clamp from the bracket on the
RH fender apron.
(f) Disconnect the brake booster vacuum hose from the
throttle body.
(g) Disconnect the engine coolant reservoir hose from the
water outlet.
(h) Disconnect the heater hose from the intake manifold.
(i) Disconnect the heater hose from the water inlet housing.

IN05Y-17
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN-19
19 Author
: Date
:
2001 AVALON (RM808U)
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
A large number of ECU controlled systems are used in the AVALON. In general, the ECU controlled system
is considered to be a very intricate system requiring a high level of technical knowledge and expert skill to
troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, troubleshooting of
these systems is not complex. If you have adequate understanding of the system and a basic knowledge
of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. This
manual is designed through emphasis of the above standpoint to help service technicians perform accurate
and effective troubleshooting, and is compiled for the following major ECU controlled systems:
The troubleshooting procedure and how to make use of it are described on the following pages.
SystemPage
1. EngineDI-1
2. Automatic TransaxleDI-158
3. Anti-Lock Brake System With Electronic Brake Force Distribution (EBD)DI-210
4. ABS With EBD & BA & TRAC & VSC SystemDI-250
5. Supplemental Restraint SystemDI-347
6. Power Seat Control System (w/ Driving position memory)DI-488
7. Theft Deterrent SystemDI-517
8. Cruise Control SystemDI-549
9. Engine Immobilizer SystemDI-597
10.Body Control SystemDI-615
11. Driver Door Control SystemDI-676
12.Passenger Door Control SystemDI-700
13.Multiplex Communication SystemDI-718
14.Air Conditioning SystemDI-752
FOR USING OBD II SCAN TOOL OR TOYOTA HAND-HELD TESTER

Before using the scan tool or tester, the scan tool's instruction book or tester's operator manual should
be read thoroughly.

If the scan tool or tester cannot communicate with ECU controlled systems when you have connected
the cable of the scan tool or tester to DLC3, turned the ignition switch ON and operated the scan tool,
there is a problem on the vehicle side or tool side.
(1) If communication is normal when the tool is connected to another vehicle, inspect the diagnosis
data link line (Bus
line) or ECU power circuit of the vehicle.
(2) If communication is still not possible when the tool is connected to another vehicle, the problem
is probably in the tool itself, so perform the Self Test procedures outline in the Tester Operator's
Manual.

DIAGNOSTIC TROUBLE CODE CHECK PROCEDURE
Diagnostic Trouble
Code Check (Make a
note of and then clear)Confirmation
of SymptomsDiagnostic Trouble
Code CheckProblem Condition
Diagnostic Trouble
Code DisplayProblem symptoms
existSame diagnostic
trouble code is
displayedProblem is still occurring in the diagnostic
circuit
Normal code is
displayedThe problem is still occurring in a place
other than in the diagnostic circuit
(The diagnostic trouble code displayed
first is either for a past problem or it is a
secondary problem)
No problem
symptoms existThe problem occurred in the diagnostic
circuit in the past
Normal Code DisplayProblem symptoms
existNormal code is
displayedThe problem is still occurring in a place
other than in the diagnostic circuit
No problem
symptoms existNormal code is
displayedThe problem occurred in a place other
than in the diagnostic circuit in the past
IN-22- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
22 Author
: Date
:
2001 AVALON (RM808U)
2. SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE CHECK
The diagnostic system in the AVALON fulfills various functions. The first function is the Diagnostic Trouble
Code Check in which a malfunction in the signal circuits to the ECU is stored in code in the ECU memory
at the time of occurrence, to be output by the technician during troubleshooting. Another function is the Input
Signal Check which checks if the signals from various switches are sent to the ECU correctly.
By using these check functions, the problem areas can be narrowed down quickly and troubleshooting can
be performed effectively. Diagnostic functions are incorporated in the following systems in the AVALON.
SystemDiagnostic Trouble
Code CheckInput Signal Check
(Sensor Check)Diagnostic Test
Mode (Active Test)
Engine
Automatic Transaxle
Anti-Lock Brake System With Electronic Brake Force Distribution (EBD)
ABS With EBD & BA & TRAC & VSC System
Supplemental Restraint System
Cruise Control System
Engine Immobilizer System
Multiplex Communication System
Air Conditioning System (with Check
Mode)
 (with Check
Mode)











In diagnostic trouble code check, it is very important to determine whether the problem indicated by the diag-
nostic trouble code is still occurring or occurred in the past but returned to normal at present. In addition,
it must be checked in the problem symptom check whether the malfunction indicated by the diagnostic
trouble code is directly related to the problem symptom or not. For this reason, the diagnostic trouble codes
should be checked before and after the symptom confirmation to determine the current conditions, as shown
in the table below. If this is not done, it may, depending on the case, result in unnecessary troubleshooting
for normally operating systems, thus making it more difficult to locate the problem, or in repairs not pertinent
to the problem. Therefore, always follow the procedure in correct order and perform the diagnostic trouble
code check.

SS-26
- SERVICE SPECIFICATIONSAUTOMATIC TRANSAXLE
142 Author
: Date
:
2001 AVALON (RM808U) Engine hood x Hood hinge
2626519
Engine hanger x Engine2020014
Cruise control actuator x Body131309
RH drive shaft x Rear side engine mounting insulator3233024
Hole cover x Torque converter clutch housing4142030
Floor shift assembly x Body121209

ST04N-03
B07463
Throttle Cable Clamp
Battery Tray
Cruise
Control
Actuator
Connector
Cruise Control Actuator Cruise Control
Cover
Clamp Hold Down Clamp
Starter Cable
Starter Connector
Starter
Battery
Air Cleaner CapMAF Meter Connector
VSV Connector for
Canister Close ValveAir Hose
ST-2
- STARTINGSTARTER
1255 Author
: Date
:
2001 AVALON (RM808U)
STARTER
COMPONENTS