engine TOYOTA AVALON 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: AVALON, Model: TOYOTA AVALON 2001Pages: 1897, PDF Size: 26.61 MB
Page 698 of 1897
F10171
Normal Signal Waveform
2 m/s / DivisionGND
1 V / Division
DI-316
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
472 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check translate ECU communication.
REFERENCE: INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Remove the translate ECU.
(b) Connect the oscilloscope to each of the terminals ENG+
or TRC+ and GND of the translate ECU harness side con-
nector.
CHECK:
Start the engine, and check the signal waveform.
OK Check and replace translate ECU.
NG
2 Check for open and short circuit in harness and connector between each of ter-
minals ENG+, ENG-, TRC+ and TRC- of translate ECU and ECM (See page
IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ECM.
Page 701 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-317
473 Author: Date:
2001 AVALON (RM808U)
DTC Normal Code Malfunction in ECM
CIRCUIT DESCRIPTION
If any trouble occurs in the ECM control system, the ECU prohibits ABS & VSC control.
DTC No.DTC Detecting ConditionTrouble Area
Normal Code
Conditions 1., 2,. 3, or 4,continue for 5 sec. or more:
1. Engine malfunction signal is sent from ECM.
2. Shift malfunction signal is sent from ECM
3. The shift position is other than P and N range input volt-
age is 8 V or more.
4. The shift position is PN or rev and D range input voltage
is 8 V or more.ECM circuit
ECM
Brake fluid level
Brake fluid level warning switch circuit
Steering angle sensor
ABS & BA & TRAC & VSC ECU
INSPECTION PROCEDURE
1 Is DTC out put for ECM?
Check DTC on page DI-3.
YES Repair engine control system according to the
output code.
NO
2 Check the DTC for the ABS and VSC (See page DI-252).
*1 Repair ABS and VSC control system according
to the code output.
*2
Check and replace translate ECU.
*1: Output NG code except for DTC of VSC system C1301/42
*2: Output NG code DTC of VSC system C1301/42 only
DI6OF-03
Page 702 of 1897
F09822
ABS & BA &
TRAC & VSC ECU
IND A2031
V V18
IL1 M6 M69
4SLIP
R-B J/B No. 4
4D
4F 413
R-B
Driver Side J/B
1G1
1D10
1B1C 3 41 2IG1 Relay GAUGE
No. 1
W
W-R
2
IG1
AM1 4Ignition Switch
IF17
W-L
551
2 AM1 Engine Room R/B No. 5
B
2G
2H1 1 Engine Room J/B
B-L
F6 1 F10 F81
1
ALT FL Block
IG
Battery
FL MAIN
B Multi Display
4 3
W-BW-L
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-333
489 Author: Date:
2001 AVALON (RM808U)
SLIP Indicator Light Circuit
CIRCUIT DESCRIPTION
The SLIP indicator light blinks during TRAC & VSC operation.
WIRING DIAGRAM
DI6OL-03
Page 709 of 1897
F09811
Battery
FL MAIN
B F61 F10 F81
1
ALT
FL
BlockB-L
2G
2H1 1 5
5 1 2AM1 Engine Room R/B No. 5
Engine Room J/BB W-LW-L
IF17 W-R
2
IG1 AM1 4Ignition Switch WDriver Side J/B
1G1
1B 13
1B3
1C4
3
4 12 IG1 RelayECU-IG
No. 2
W-B
IG Y-R
L-WABS & BA &
TRAC & VSC ECU
A20 V9
VSC Warning
Buzzer
BZ 86
Buzzer1 2
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-339
495 Author: Date:
2001 AVALON (RM808U)
VSC Buzzer Circuit
CIRCUIT DESCRIPTION
The VSC buzzer sounds during VSC operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 3 in case
of not using the TOYOTA hand-held tester.
1 Check operation of the VSC buzzer.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check ºON-OFFº function of the VSC buzzer with the TOYOTA hand-held tester.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
DI6ON-03
Page 712 of 1897
F09820
ABS & BA &
TRAC & VSC ECU
A20
A20CSW
69
J6
J/CWT V8
VSC OFF
Switch
44
Y-RW-L
W-B14 J/B No. 4
4A
4D
4F 4H4F
4D21 8
4 16
16
13 Y-R W-B
Multi Display
M6 M747
R-B
B
BR-B
Driver Side J/B
1G1
1D10
1B3
1C4
34 12 IG1 RelayGAUGE
No. 1
W-R 2
IG1 AM1
4 Ignition Switch
W-L W
IF1 7
W-L
5
5 1 2AM1 Engine Room R/B No. 5
B
2G 2H1
1
B-LW-B
IG II W-B
Battery
FL MAIN
B
F61 F10F81 1
ALT
FL
Block
VSC OFF
Engine Room J/B DI-336
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
492 Author: Date:
2001 AVALON (RM808U)
VSC OFF Indicator Light, VSC OFF Switch Circuit
CIRCUIT DESCRIPTION
This is the TRAC & VSC control main switch. When the VSC OFF switch is pressed, TRAC & VSC control
is deactivated and the VSC OFF indicator light lights up. By turning off the ignition switch, TRAC & VSC con-
trol is surely activated when the ignition switch turns ON next time. Also, the VSC OFF indicator light truns
ºONº when the ECU prohibit TRAC & VSC controls.
WIRING DIAGRAM
DI6OM-03
Page 715 of 1897
F09818
ABS & BA &
TRAC & VSC ECU
VSCW A2070
P-B
R-B 15
4D
4F 134 4F15
4C P-BJ/B No. 4
M6 M6
R-B4
10 Multi Display
Driver Side J/B
1G1
1D 10
1B3
1C4
3
4 12 IG1 RelayGAUGE
No. 1
W-R 2
IG1 AM1
4 Ignition Switch
W-L W
IF1
7
W-L
5
5 1 2AM1 Engine Room R/B No. 5
B2G 2H11W-B
IG B-L
Battery
FL MAIN
B
F61 F10 F81 1
ALT
FL BlockVSC
Engine Room J/B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-327
483 Author: Date:
2001 AVALON (RM808U)
VSC Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU stores DTC to be necessary to shut down VSC operation, the VSC warning light lights on the
combination meter.
WIRING DIAGRAM
DI6OJ-03
Page 723 of 1897
DI6NU-01
F07883
ABS Warning Light
VSC Warning Light
VSC OFF Indicator Light
SLIP Indicator Light
BRAKE Warning Light
DLC2Rear Speed Sensor
Sensor Rotor
Brake Actuator
ABS & BA & TRAC & VSC ECU
VSC OFF Switch Front Speed Sensor
DLC1
ABS Solenoid RelayABS Motor Relay
Room R/B No. 8 Engine
Precharge PumpMaster Cylinder
Pressure Sensor
Parking Brake Switch
Stop Light Switch
Translate ECU
Front Speed Sensor
Sensor Rotor
Sensor Rotor
Rear Speed Sensor
DLC3
Steering Angle Sensor
Yaw Rate Sensor
(Including Deceleration Sensor)
Active Lamp Relay
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-261
417 Author: Date:
2001 AVALON (RM808U)
PARTS LOCATION
Page 727 of 1897
F02201
DLC1
TsTc E
1
BR3904
0.13 sec. 0.13 sec.
ON
OFF
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-255
411 Author: Date:
2001 AVALON (RM808U)
2. SPEED SENSOR SIGNAL CHECK (TEST MODE)
(a) In case of not using TOYOTA hand-held tester:
Check the sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI-325).
(5) Drive vehicle straight forward.
Drive vehicle at a speed faster than 45 km/h (28
mph) for several seconds.
HINT:
The sensor check may not be completed if the front wheels are
spun or the steering wheel is steered during this check.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunction codes are identified at the same
time, the lowest numbered code will be displayed 1st.
(9) After doing the check, disconnect the SST from ter-
minals Ts and E
1, Tc and E1 of DLC1, and turn the
ignition switch OFF.
SST 09843-18020
Page 728 of 1897
F07887
TOYOTA Hand-
held Tester
DLC3
F19119
DLC1
Ts E1
DLC3
CG
Ts
DI-256
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
412 Author: Date:
2001 AVALON (RM808U)
(b) In case of using TOYOTA hand-held tester:
Check the sensor signal.
(1) Hook up the TOYOTA hand- held tester to the
DLC3.
(2) Do step (3) - (6) on the previous page.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the TOYOTA hand-held tester operator's manu-
al for further details.
DTC of speed sensor check function:
Code No.DiagnosisTrouble Area
C1271 / 71Low output voltage of right front speed sensor
Right front speed sensor
Sensor installation
Right front speed sensor rotor
C1272 / 72Low output voltage of left front speed sensor
Left front speed sensor
Sensor installation
Left front speed sensor rotor
C1273 / 73Low output voltage of right rear speed sensor
Right rear speed sensor
Sensor installation
Right rear speed sensor rotor
C1274 / 74Low output voltage of left rear speed sensor
Left rear speed sensor
Sensor installation
Left rear speed sensor rotor
C1275 / 75Abnormal change in output signal of right front speed sen-
sorRight front speed sensor rotor
C1276 / 76Abnormal change in output signal of left front speed sensorLeft front speed sensor rotor
C1277 / 77Abnormal change in output signal of right rear speed sensorRight rear speed sensor rotor
C1278 / 78Abnormal change in output signal of left rear speed sensorLeft rear speed sensor rotor
3. STEERING ANGLE SENSOR ZERO POINT CALIBRA-
TION
NOTICE:
Make sure to perform steering angle sensor zero point cal-
ibration when:
Replacing the steering angle sensor or ECU.
Adjusting the front wheel alignment of the steering
wheel center point in accordance with removal and
installation or replacement of the suspension, axle or
steering parts.
(a) Using the SST, connect terminals Ts and E
1 of DLC1 or
Ts and CG of DLC3
.
SST DLC1: 09843-18020
DLC3: 09843-18040
(b) Turn the ignition switch to the ON position, without start-
ing the engine.
(c) Make sure the steering wheel off center angle is within 3
degrees of center before attempting calibration.
Page 734 of 1897
F07885
1 2 3 4 5 6 7 8 9 10
11 12 13
14
21 22 23 24 25 26
15
16 17 18 19 20
T5
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-265
421 Author: Date:
2001 AVALON (RM808U)
Translate ECU:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
IG1(T5 - 1) - GND (T5 - 14)Y-R e W-BIG switch ON10 - 14
PKB2 (T5 - 2) - GND (T5 -YGWBIG switch ON, paking brake switch ONBelow 2.0PKB2 (T5 2) GND (T5
14)Y-G e W-BIG switch ON, paking brake switch OFF10 - 14
VSC+ (T5 - 4) - VSC- (T5 -
17)W e OEngine idlingPulse generation
SS1 (T5 - 5) - SS2 (T5 - 18)L e B-WEngine idlingPulse generation
RSS (T5 - 6) - GND (T5 - 14)BR e W-BIG switch OFFContinuity
P (T5 10) GND (T5 14)GWWBIG switch ON, shift lever is in P range8 - 14P (T5 - 10) - GND (T5 - 14)G-W e W-BIG switch ON, shift lever is in other than P rangeBelow 1.5
LVL2 (T5 - 11) - GND (T5 - 14)R-W e W-BIG switch ON, fluid level switch ONBelow 1.5
D (T5 12) GND (T5 14)YRWBIG switch ON, shift lever is in D range8 - 14D (T5 - 12) - GND (T5 - 14)Y-R e W-BIG switch ON, shift lever is in other than D rangeBelow 1.5
NEO (T5 - 13) - GND (T5 - 14)Y-B e W-BEngine idlingPulse generation
PKB (T5 - 15) - GND (T5 - 14)Y-G e W-BIG switch OFF, parking brake switch ONBelow 2.0
BRL (T5 16) GND (T5 14)RWWBIG switch ON, BRAKE warning light ONBelow 2.0BRL (T5 - 16) - GND (T5 - 14)R-W e W-BIG switch ON, BRAKE warning light OFF10 - 14
TRC+ (T5 - 20) - TRC- (T5 -
7)BR e W-BEngine idlingPulse generation
Tc (T5 - 21) - GND (T5 - 14)LG-R e W-BIG switch ON10 - 14
ENG+ (T5 - 22) - ENG- (T5 -
9)V e GREngine idlingPulse generation
Ts (T5 - 24) - GND (T5 - 14)LG-B e W-BIG switch ON10 - 14
LBL (T5 - 25) - GND (T5 - 14)L-B e W-BIG switch ON, fluid level switch ONBelow 1.0
CCS (T5 - 26) - GND (T5 - 14)Y-R e W-BIG switch ONBelow 2.0