TOYOTA AVALON 2001 Service Repair Manual

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-625
781 Author
: Date
:
2001 AVALON (RM808U)
POWER WINDOW CONTROL SYSTEM:
SymptomSuspect AreaSee page
All power window system does not operate.
1. Power main relay
2. Driver door control system
3. Passenger door control systemBE-73
DI-676
DI-677
Driver door window system dose not operate.
1. Driver door control ECU
2. Door lock motor circuit (Driver)
3. Body ECU
4. Wire harnessDI-692
DI-692
DI-641
-
Passenger door window system dose not operate.
1. Passenger door control ECU
2. Door lock motor circuit (Passenger)
3. Body ECU
4. Wire harnessDI-714
DI-714
DI-641
-
Rear power window control system does not operate.
(Both left and right)1. Body ECU
2. Wire harnessIN-30
IN-30
Rear power window control system does not operate.
(Only one side)1. Rear power window switch circuit
2. Body ECU
3. Wire harnessDI-645
IN-30
IN-30
POWER DOOR LOCK CONTROL SYSTEM:
SymptomSuspect AreaSee page
ºDoor lock systemº does not operate at all.
1. GAUGE Fuse
2. DOOR Fuse
3. Driver door control ECU
4. Body ECU
5. Wire Harness-
-
DI-676
IN-30
-
Door lock system does not operate by manual switch.
1. Driver door control ECU
2. Body ECU
3. Wire HarnessDI-676
IN-30
-
Door lock system does not operate by door key.
1. Door Key Lock and Unlock Switch circuit
2. Body ECU
3. Wire Harness
4. Door Lock Link DisconnectedDI-637
IN-30
-
-
Fault in 2-Operation unlock function of Driver's side door key lock
and unlock switch.1. Door Key Lock and Unlock Switch circuit
2. Body ECU
3. Wire HarnessDI-637
IN-30
-
Only one door lock does not operate.1. Door Lock Motor circuit
2. Wire HarnessDI-641
-
Key confinement prevention function does not operate.
1. Key unlock warning switch circuit
2. Driver door control system
3. Passenger door control systemDI-637
DI-676
DI-677
Auto lock/unlock system does not operate.
1. Door lock motor circuit
2. Driver door control system
3. Passenger door control systemDI-641
DI-676
DI-677
LUGGAGE COMPARTMENT DOOR OPENER SYSTEM:
SymptomSuspect AreaSee page
Luggage compartment door opener system does not operate.
1. Luggage door switch circuit
2. Luggage door motor circuit
3. Body ECUDI-647
DI-649
IN-30

DI-626
- DIAGNOSTICSBODY CONTROL SYSTEM
782 Author
: Date
:
2001 AVALON (RM808U)
WIRELESS DOOR LOCK CONTROL SYSTEM:
SymptomSuspect AreaSee page
All functions of wireless door lock control system do not operate.
1. Wireless door lock control receiver circuit
2. Key unlock warning switch circuit
3. Body ECUDI-651
DI-637
IN-30
Lock or unlock function does not operate.
1. Door key lock and unlock switch circuit
2. Door unlock detection switch circuit
3. Body ECUDI-688
DI-710
DI-686
DI-708
IN-30
Automatic lock function operates even if any door is opened within
30 seconds after all doors are unlocked by wireless door lock
control system.1. Door courtesy switch circuit
2. Body ECUDI-639
IN-30
Wireless door lock operates, but the buzzer does not sound.
1. Wireless door lock buzzer circuit
2. Wireless door lock receiver circuit
3. Body ECUDI-653
DI-651
IN-30
Buzzer sound, but wireless door lock function does not operate.1. Wireless door lock receiver circuit
2. Body ECUDI-651
IN-30
Luggage compartment door opener wireless function.1. Luggage compartment door opener motor circuit
2. Body ECUDI-649
IN-30
POWER MIRROR CONTROL SYSTEM:
SymptomSuspect AreaSee page
Mirror does not operate.
1. CIG/RAD fuse
2. Mirror switch circuit
3. Mirror motor
4. Body ECU
5. Wire harnessBE-9
DI-515
BE-1 14
IN-30
IN-30
Mirror operates abnormally.
1. Mirror switch circuit
2. Mirror motor
3. Body ECU
4. Wire harnessDI-515
BE-1 14
IN-30
IN-30
HORN SYSTEM:
SymptomSuspect AreaSee page
Horn system does not operate.
1. HORN fuse
2. Horn circuit
3. Wire harnessBE-9
DI-672
IN-30
Horns blow all the time.1. Horn circuit
2. Wire harnessDI-672
IN-30
One horn operates but the other horn does not operate.1. Horn circuit
2. Wire harnessDI-672
IN-30
Horns operate abnormally.1. Horn circuit
2. Wire harnessDI-672
IN-30

DI6LI-01
I11362I11578I11577I13264
B4
B5
- DIAGNOSTICSBODY CONTROL SYSTEM
DI-619
775 Author
: Date
:
2001 AVALON (RM808U)
TERMINALS OF ECU
Terminal No. (Symbols)Wring ColorConditionSTD Voltage (V)
1 e B5-14
(BDR1 eGND1)- e W-BConstant10 - 14 V
2 e B5-14WBIgnition switch OFF or ACCBelow 1 V2 e B5 14
(SIG eGND1)- e W-BIgnition switch ON10 - 14 V
3 e B5-14WBIgnition switch OFFBelow 1 V3 e B5 14
(ACC e GND1)- e W-BIgnition switch ACC or ON10 - 14 V
5 e B5-14WBEach door are openedBelow 1 V5 e B5 14
(ILL e GND1)- e W-BAll door are closed10 - 14 V
7 e B5-14
(BDR2 e GND1)- e W-BConstant10 - 14 V
8 e B5-14WBIgnition switch ON and light control switch HEADBelow 2 V8 e B5 14
(HEAD e GND1)- e W-BIgnition switch ON and light control switch OFF10 - 14 V
9 e B5-14WBIgnition switch ON and light control switch TAILBelow 2 V9 e B5 14
(TRLY e GND1)- e W-BIgnition switch ON and light control switch OFF10 - 14 V
10 e B5-14WBHorn switch position is ONBelow 1 V10 e B5 14
(HORN e GND1)- e W-BHorn switch position is OFF10 - 14 V
11 e B5-14WBBrake pedal is pushed10 - 14 V11 e B5 14
(STOP e GND1)- e W-BBrake pedal is releasedBelow 1 V
B4-1 e B5-14GWWBPark/neutral position switch is except P position10 - 14 VB4 1 e B5 14
(P e GND1)G-W e W-BPark/neutral position switch is P positionBelow 1 V
B4-2 e B5-14BWWBHeadlight control switch position is FLASHBelow 1 VB4 2 e B5 14
(HF e GND1)B-W e W-BHeadlight control switch position is except FLASH10 - 14 V
B4-3 e B5-14RYWBLight control switch HEADBelow 2 VB4 3 e B5 14
(HEAD e GND1)R-Y e W-BLight control switch OFF or TAIL10 - 14 V
B4-4 e B5-14GOWBLight control switch AUTOBelow 2 VB4 4 e B5 14
(AUTO e GND1)G-O e W-BLight control switch OFF, TAIL or HEAD10 - 14 V
B4-5 e B5-14RLWBDriver door closed10 - 14 VB4 5 e B5 14
(DCTY e GND1)R-L e W-BDriver door openedBelow 1 V
B4-6 e B5-14RWBLuggage compartment door is openedBelow 1 VB4 6 e B5 14
(LGC e GND1)R e W-BLuggage compartment door is closed10 - 14 V

DI-620
- DIAGNOSTICSBODY CONTROL SYSTEM
776 Author
: Date
:
2001 AVALON (RM808U) B4-7 e B5-14
GRWBWi l d l k i i ti i itB4 7 e B5 14
(PRG e GND1)G-R e W-BWireless door lock receiver communication circuit-
B4-8 e B5-14YRWBR l ft id i d DOWN tiBl 1VB4 8 e B5 14
(RLD e GND1)Y-R e W-BRear left side power window DOWN operationBelow 1 V
B4-9 e B5-14
(MPX2 e GND1)G-W e W-BMultiplex communication circuit-
B4-10 e B5-14RBWBDaytime running light system is operatingBelow 1 VB4 10 e B5 14
(DRL e GND1)R-B e W-BConstant10 - 14 V
B4-1 1 e Body ground
(GND2 e Body ground)W-BConstantBelow 1 V
B4 13B5 14Headlight control switch position is HI beam or FLASHBelow 1 VB4-13 e B5-14
(HU e GND1)B-R e W-BHeadlight control switch position is except HI beam or
FLASH10 - 14 V
B4-14 e B5-14PWBLight control switch TAIL or HEADBelow 2 VB4 14 e B5 14
(TAIL e GND1)P e W-BLight control switch OFF10 - 14 V
B14-15 e B5-14YGWBParking brake is usedBelow 1 VB14 15 e B5 14
(PKB e GND1)Y-G e W-BParking brake is not used10 - 14 V
B4-16 e B5-14RWWBWith seat belt ONBelow 1 VB4 16 e B5 14
(DBKL e GND1)R-W e W-BNo seat belt ON10 - 14 V
B4-17 e B5-14RYWBKey is insertedBelow 1 VB4 17 e B5 14
(KSW e GND1)R-Y e W-BKey is not inserted 10 - 14 V
B4-18 e B5-14LG RWBDLC3 i ti i itB4 18 e B5 14
(TC e GND1)LG-R e W-BDLC3 communication circuit-
B4-19 e B5-14LWBNormal condition2 - 3.5 VB4 19 e B5 14
(GSW e GND1)L e W-BWhen wire harness is open4 - 6 V
B4-20 e B5-14PLWBBuzzer sound10 - 14 VB4 20 e B5 14
(BZ e GND1)P-L e W-BBuzzer does not soundBelow 1 V
B4-21 e B5-14LWWBWireless door lock control system is operatedBelow 1 VB4 21 e B5 14
(RDA e GND1)L-W e W-BWireless door lock control system is not operated10 - 14 V
B4-22 e B5-14
(RLU e GND1)G-Y e W-BRear left side power window UP operationBelow 1 V
B4-23 e B5-14
(MPX1 e GND1)V e W-BMultiplex communication circuit-
B4-24 e B5-14
(B e GND1)W-G e W-BConstant10 - 14 V
B4-25 e B5-14LWBLuggage compartment door opener switch is operatedBelow 1 VB4 25 e B5 14
(TR+ e GND1)L e W-BLuggage compartment door opener switch is not operated10 - 14 V
B5-1 e B5-14
(ACTD e GND1)L-W e W-BDriver door lock is operating10 - 14 V
B5-2 e B5-15
(ACT+ e ACT-)L-R e LDoor lock is operating10 - 14 V
B5-3 e B5-14OWBDriver door closed10 - 14 VB5 3 e B5 14
(PCTY e GND1)O e W-BDriver door openedBelow 1 V
B5-4 e B5-14WRWBPassenger seat switch OFF10 - 14 VB5 4 e B5 14
(SEAT e GND1)W-R e W-BPassenger seat switch ONBelow 1 V
B5-5 e B5-14LOWBRear door lockedBelow 2 VB5 5 e B5 14
(LSW e GND1)L-O e W-BRear door unlocked10 - 14 V

- DIAGNOSTICSBODY CONTROL SYSTEM
DI-621
777 Author
: Date
:
2001 AVALON (RM808U) B5-6 e B5-14
RLWBIgnition switch ON10 - 14 VB5 6 e B5 14
(ALTL e GND1)R-L e W-BEngine runningBelow 1 V
B5-7 e B5-14
(CLTE e GND1)Y-B e W-BAutomatic light control sensor communication circuit-
B5-8 e B5-14
(CLTS e GND1)LG e W-BAutomatic light control sensor communication circuit-
B5-9 e B5-14
(MPX3 e GND1)R-Y e W-BMultiplex communication circuit-
B5-10 e B5-14
(RRU e GND1)G-B e W-BRear right side power window UP operationBelow 1 V
B5-1 1 e B5-14GRWBPassenger seat belt unfastenedBelow 1 VB5 1 1 e B5 14
(PBEW e GND1)G-R e W-BPassenger seat belt fastened10 - 14 V
B5-13 e Body ground
(CLTC e Body ground)W-B e Body groundConstantBelow 1 V
B5-14 e Body ground
(GND1 e Body ground)W-B e -ConstantBelow 1 V
B5-16 e B5-14RWWBRear door closed10 - 14 VB5 16 e B5 14
(RCTY e GND1)R-W e W-BRear door openedBelow 1 V
B5-17 e B5-14GWBPassenger seat belt unfastenedBelow 1 VB5 17 e B5 14
(PBKL e GND1)G e W-BPassenger seat belt fastened10 - 14 V
B5-18 e B5-14LBWBLuggage compartment door opener switch is operatedBelow 1 VB5 18 e B5 14
(TKU e GND1)L-B e W-BLuggage compartment door opener switch is not operated10 - 14 V
B5-20 e B5-14
(CLTB e GND1)L e W-BAutomatic light control sensor communication circuit-
B5-21 e B5-14
(MPX4 e GND1)G-B e W-BMultiplex communication circuit-
B5-22 e B5-14
(RRD e GND1)R-B e W-BRear right side power window DOWN operationBelow 1 V
B5-23 e B5-14GWWBPassenger seat belt unfastenedBelow 1 VB5 23 e B5 14
(DBEW e GND1)G-W e W-BPassenger seat belt fastened10 - 14 V
B5-25 e B5-14RWBEach door closed10 - 14 VB5 25 e B5 14
(AJAR- e GND1)R e W-BEach door openedBelow 1 V

DI08M-14
Duty Ratio =A + BA
x 100 (%)
ON
OFFA
B
1 cycle
I13618
Cruise Control ECU
MC MO
R-B Cruise Control Actuator
R 1
215
C4
C15
MO
MCP
P II1 15
II1 14
7
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-561
717 Author
: Date
:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC 11, 15 Actuator Motor Circuit
CIRCUIT DESCRIPTION
The actuator motor is operated by signals from the ECU. Acceleration and deceleration signals are trans-
mitted according to changes in the Duty Ratio (See below).
Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity
in one cycle, and B is the period of non-continuity.
DTC No.Detection ItemTrouble Area
11Short in actuator motor circuit.

Actuator motor

Harness or connector between cruise control ECU and
actuator motor

Cruise control ECU
15Open in actuator motor circuit.
Actuator motor
WIRING DIAGRAM

I00004
I00151
2
1
DI-562
- DIAGNOSTICSCRUISE CONTROL SYSTEM
718 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check resistance between terminals MO and MC of actuator motor.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between terminals 1 and 2.
HINT:
If control plate is in fully opened or fully closed positions, resis-
tance can not be measured.
OK:
Resistance: more than 4.2 W
NG Replace cruise control actuator.
OK
2 Check for open and short in harness and connectors between cruise control
ECU and actuator motor (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN-30).

I13617
Cruise Control ECU
4 3
3
W-B8 Stop Light Switch
4Cruise Control Actuator
13
II1
IJJ9
J/CL
9P-B P-B G-B GNDL
AC4
S4
C15
W-B II1
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-563
719 Author
: Date
:
2001 AVALON (RM808U)
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h (9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph), cruise control at the
set speed is resumed.
DTC No.Detection ItemTrouble Area
12Short in actuator magnetic clutch circuit.
Open (0.8 sec.) in actuator magnetic clutch circuit.

STOP Fuse

Stop light switch

Actuator magnetic clutch

Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground

Cruise control ECU
WIRING DIAGRAM
DI08N-15

I14465
STOP Fuse
I00133
21
43
DI-564
- DIAGNOSTICSCRUISE CONTROL SYSTEM
720 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check STOP fuse.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Remove the STOP fuse from instrument panel junction
block.
CHECK:
Check fuse continuity.
OK:
There is continuity.
NG Replace STOP fuse.
OK
2 Check stop light switch.
PREPARATION:
Disconnect the stop light switch connector.
CHECK:
Check continuity between terminals.
Switch positionContinuity
Switch pin free
(Brake pedal depressed)1 - 2
Switch pin pushed in
(Brake pedal released)3 - 4
NG Replace stop light switch.
OK

I00311
4
3
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-565
721 Author
: Date
:
2001 AVALON (RM808U)
3 Check resistance between terminals L and GND of actuator magnetic clutch.
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the actuator connector.
CHECK:
Measure resistance between terminals 3 and 4.
OK:
Resistance: 34.65 - 42.35 W.
NG Replace cruise control actuator.
OK
4 Check for open and short in harness and connectors between cruise control
ECU and actuator magnetic clutch, actuator magnetic clutch and body ground
(See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU (See
page IN-30).